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Encyclopedia > Short Sunderland
Sunderland
Type Military flying boat
Manufacturer Short Brothers
Maiden flight 16 October 1937
Introduced 1938
Retired 1967
Primary users Royal Air Force
French Navy
Royal Australian Air Force
Royal New Zealand Air Force
Variants Short Sandringham
Short Seaford

The Short S.25 Sunderland was a British flying boat patrol bomber developed for the Royal Air Force by Short Brothers, first flown on 16 October 1937 by Shorts' Chief Test Pilot, John Lankester Parker. Based in part upon the S.23 Empire flying boat, the flagship of Imperial Airways, the S.25 was extensively re-engineered for military service. As one of the most powerful and widely used flying boats throughout the Second World War,[1] it terrorized the German U-boat fleet. It took its name from the town of Sunderland in northeast England. Image File history File links Question_book-3. ... Image File history File links Short_Sunderland. ... An aerospace manufacturer is a company or individual involved in the various aspects of designing, building, testing, selling, and maintaining aircraft, aircraft parts, missiles, rockets, and/or spacecraft. ... Short Brothers plc is a British aerospace company, abbreviated Shorts and is now based in Belfast, Northern Ireland, UK. Founded in 1908, Shorts was the first true aviation company in the world, and was a manufacturer of flying boats during the 1920s and 1930s and throughout the Second World War. ... The Maiden flight of an aircraft is the first occasion on which an aircraft leaves the ground of its own accord. ... is the 289th day of the year (290th in leap years) in the Gregorian calendar. ... This is a list of aviation-related events from 1937: Events March March 5 - Imperial Airways opens a new flying boat base at Hythe, Hampshire. ... RAF redirects here. ... The French Navy, officially called the National Navy (French: Marine Nationale) is the maritime arm of the French military. ... The Royal Australian Air Force (RAAF) is the Air Force branch of the Australian Defence Force. ... The Royal New Zealand Air Force (RNZAF) is the air force arm of the New Zealand Defence Force. ... The Short Sandringham was an airliner derivative of the Short Sunderland military flying boat. ... An alternative name for the Short Sunderland Mark IV. ... Boeing 314 A flying boat is an aircraft that is designed to take off and land on water, in particular a type of seaplane which uses its fuselage as a floating hull (instead of pontoons mounted below the fuselage). ... A patrol bomber, or patrol aircraft, is an airplane designed to operate for long times over water in an anti-shipping or anti-submarine role. ... RAF redirects here. ... Short Brothers plc is a British aerospace company, abbreviated Shorts and is now based in Belfast, Northern Ireland, UK. Founded in 1908, Shorts was the first true aviation company in the world, and was a manufacturer of flying boats during the 1920s and 1930s and throughout the Second World War. ... is the 289th day of the year (290th in leap years) in the Gregorian calendar. ... This is a list of aviation-related events from 1937: Events March March 5 - Imperial Airways opens a new flying boat base at Hythe, Hampshire. ... Test pilots are aviators who fly new and modified aircraft in specific maneuvers, allowing the results to be measured and the design to be evaluated. ... John Lankester Parker OBE FRAeS Hon. ... The Short Empire or S.23 was a passenger and mail carrying flying boat, of the 1930s and 1940s, which flew between Britain and British colonies in Africa, Asia and Australia. ... The Imperial Airways Empire Terminal, Victoria, London. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000... U-boat is also a nickname for some diesel locomotives built by GE; see List of GE locomotives October 1939. ... For other uses, see Sunderland (disambiguation). ... For other uses, see England (disambiguation). ...

Contents

Development

The early 1930s saw intense competition in developing long-range flying boats for intercontinental passenger service. The United Kingdom had no match for the new American Sikorsky S-42 flying boats, which were making headlines all over the world. The powers-that-be in Britain felt that "something should be done".[citation needed] The 1930s were described as an abrupt shift to more radical and conservative lifestyles, as countries were struggling to find a solution to the Great Depression, also known as the [[. In East Asia, the rise of militarism occurred. ... The Sikorsky S-42 was the first real transoceanic flying boat. ...


In 1934, the British Postmaster General declared that all first-class Royal Mail sent overseas was to travel by air, effectively establishing a subsidy for the development of intercontinental air transportation in a fashion similar to the U.S. domestic program a decade earlier. In response, Imperial Airways announced a competition between aircraft manufacturers to design and produce 28 flying boats, each weighing 18 tons (18.2 tonnes) and having a range of 700 miles (1,130 km) with capacity for 24 passengers. Year 1934 (MCMXXXIV) was a common year starting on Monday (link will display full 1934 calendar) of the Gregorian calendar. ... In the United Kingdom, the Postmaster General is a now defunct ministerial position. ... Royal Mail is the national postal service of the United Kingdom. ... The Imperial Airways Empire Terminal, Victoria, London. ...


The contract went almost directly to Short Brothers of Rochester, England. Although Short had long built flying boats for the military and for Imperial Airways, none of them were in the class of size and sophistication requested, but the business opportunity was too great to pass up. Oswald Short, head of the company, began a fast-track program to come up with a design for a flying boat far beyond anything they had ever built. Short Brothers plc is a British aerospace company, abbreviated Shorts and is now based in Belfast, Northern Ireland, UK. Founded in 1908, Shorts was the first true aviation company in the world, and was a manufacturer of flying boats during the 1920s and 1930s and throughout the Second World War. ... , Rochester is a town in Kent, England, at the lowest bridging point of the River Medway about 30 miles (50 km) from London. ...


While the first S.23 was under development, the British Air Ministry was taking actions that would result in a purely military version of the big Shorts flying boats. The 1933 Air Ministry requirement "R.2/33" called for a next-generation flying boat for ocean reconnaissance, in which the new aircraft had to have four engines but could be either a monoplane or biplane design. The Short Empire or S.23 was a passenger and mail carrying flying boat, of the 1930s and 1940s, which flew between Britain and British colonies in Africa, Asia and Australia. ... The Air Ministry was formerly a department of the United Kingdom Government, established in 1918 with the responsibility of managing the affairs of the (then newly formed) Royal Air Force. ... This is a partial list of the British Air Ministry specifications for aircraft. ...


The R.2/33 specification was released roughly in parallel with the Imperial Airways requirement, and while Shorts continued to develop the S.23, they also worked on a response to the Air Ministry's need at a lower priority. The military flying boat variant was designated S.25 and the design was submitted to the Air Ministry in 1934.


Chief Designer Arthur Gouge originally intended that a 37 mm gun be mounted in the bow with a single Lewis gun in the tail. Like with the S.23 he tried to make the drag as little as possible. The nose was much longer than that of the S.23.[1]


Saunders-Roe also designed a flying boat, designated the "A.33", in response to the R.2/33 competition, and prototypes of both the S.25 and A.33 were ordered by the Ministry for evaluation. Saunders-Roe Princess G-ALUN History Saunders-Roe Limited was a British aircraft manufacturing company based in East Cowes, Isle of Wight. ...


Design

The S.25 shared much in common with the S.23 but was most notably different in that it had a deeper hull profile. As construction proceeded the armament changed to one Vickers K machine gun in the nose turret and four in the tail. Then there was a change in the tail turret to a powered version and Gouge had to devise a solution for the aftward movement of the centre of gravity (CofG) of the aircraft. The prototype first flew without armament on 16 October 1937. After the preliminary flight trials the prototype (K4774) had the wings swept by 4 degrees and 15 minutes by adding a spacer into the front spar attachments.[1] This moved the centre of lift enough to compensate for the CofG movement. This arrangement flew on 7 March 1938 with Bristol Pegasus XXII of 1,010 hp (753 kW). The Vickers K gun known as the Vickers Gas Operated (VGO) in British service, was a rapid firing machine gun developed for use by observers in aircraft. ... The Browning M1919 was a . ... is the 289th day of the year (290th in leap years) in the Gregorian calendar. ... Year 1937 (MCMXXXVII) was a common year starting on Friday (link will display the full calendar) of the Gregorian calendar. ... is the 66th day of the year (67th in leap years) in the Gregorian calendar. ... Year 1938 (MCMXXXVIII) was a common year starting on Saturday (link will display the full calendar) of the Gregorian calendar. ... Bristol Pegasus piston engine The Pegasus was a 9 cylinder one_row radial aircraft engine designed as the follow-on to the Bristol Aeroplane Companys very successful Bristol Jupiter, following lessons learned in the Mercury effort. ...


As with the S.23, the Sunderland's fuselage contained two decks with six bunks on the lower one, a galley with a twin kerosene pressure stove, a yacht-style porcelain flush toilet, an anchoring winch and a small machine shop for inflight repairs. The crew was originally intended to be seven but increased in later versions to 11 or more. For other uses, see Kerosene (disambiguation). ... A small portable stove and its container MSR WindPro with skillet, heat reflector, wind shield and isobutane/propane canister A portable stove is a stove specially designed to be portable and lightweight, as for camping. ... “Fine China” redirects here. ... Close coupled cistern type flushing toilet. ...


It was of all-metal construction (a lot flush-riveted) except for the control surfaces that were of fabric-covered metal frame construction. The flaps were Gouge-patented devices that moved rearwards and down, increasing the wing area and added 30% more lift for landing.[2]


The thick wings carried the four nacelle-mounted Pegasus engines and accommodated six drum fuel tanks with a total capacity of 9,200 litres (2,025 Imperial gallons, 2,430 U.S. gallons). Four smaller fuel tanks were added later behind the rear wing spar to give a total fuel capacity of 11,602 litres (2,550 Imperial gallons, 3,037 U.S. gallons), enough for eight- to 14-hour patrols. Imperial Measure was a former system of measurement used in some Commonwealth nations, most notably the United Kingdom and Canada. ...


The specification called for an offensive armament of a 37 mm gun and up to 2,000 pounds (900 kg) of bombs, mines or (eventually) depth charges. The ordnance was stored inside the fuselage and was winched up to racks, under the wing centre section, that could be traversed out through doors on each side of the (bomb room) fuselage above the waterline to their offensive position. Defensive armament included a Nash & Thomson FN-13 powered turret with four .303 Browning machine guns in the extreme tail and a manually operated .303 on either side of the fuselage, firing from ports just below and behind the wings. Much later a twin gun turret was to be dorsal mounted on the upper fuselage, about level with the wing trailing edge, bringing the total defensive armament from three to 18 machine guns. This was more than any other aircraft during the war.[3] Polish wz. ... Depth Charge used by U.S. Navy later in World War II The depth charge is the oldest anti-submarine weapon. ... Nash & Thomson was a British engineering firm that specialised in the production of hydraulically-operated gun turrets for aircraft. ... .303 cartridge The . ... The Browning M1919 was a . ...


Portable beaching gear could be attached by ground crew so that the aircraft could be pulled up on land (beached). The gear consisted of two, two-wheeled struts that could be attached to either side of the fuselage, below the wing, with a two- or four-wheel trolley and tow bar attached under the rear of the hull.


Equipment and on-water management

Like all water-based aircraft there was a need to be able to navigate on water and to control the craft up to and at a mooring. In addition to the standard navigation lights there was also a demountable mooring mast that was positioned on the upper fuselage just aft of the astrodome hatch with a 360 degree white light to show that the aircraft was moored. The crew had to know the common marine signals for watercraft to ensure safety in busy waters.


The craft could be moored to a buoy by a pendant that attached to the keel under the forward fuselage. When the craft was off the buoy the forward end of the pendant was attached to the front of the hull just below the bomb aimer's window. For anchoring there was a demountable bollard that fixed to the forward fuselage from where the front turret was retracted to allow an airman to man the position and pick up the buoy cage or to toss out the anchor. Buoys redirects here. ... A pendant (from Old French) is a hanging object, generally attached to a necklace or an earring. ... For other uses, see Keel (disambiguation). ...


A standard stocked anchor was stowed in the forward compartment alongside the anchor winch. However, depending on the operating area, a number of different kinds of anchor might be carried to cope with, for example, coral, sand or rock anchorages.


For taxiing after landing, the galley hatches were used to extend sea drogues that could be used to turn the aircraft or maintain its across wind progress (by deploying the drogue on one side only), or to slow the forward motion as much as possible (both deployed). When not in use the drogues were hand hauled back inboard, folded and stowed in wall-mounted containers just below the hatches. Operation of the drogues could be a very dangerous exercise if the aircraft was travelling on the water at speed or in strong currents, because the approximately three ft (one metre) diameter drogue would haul up on its five tonne attachment cable end inside the galley very sharply and powerfully. Once deployed it was normally impossible to recover a drogue unless the aircraft was stationary relative to the local tidal flow. This article is about a device used in the marine environment. ...


Another means of direction control on the water was by application of the flight controls, rudder and ailerons. The ailerons would cause asymmetric drag from the airflow and, ultimately, drop a float into the water to cause drag on that wing. Otherwise the pilots could use variable engine power to control the direction and speed of the aircraft on the water. In adverse combinations of tide, wind and destination this could be very difficult. By the time a buoy approach was being made, upwind and uptide, the speed of advance could be brought to a stop by shutting down the inboard engines and blipping the magneto switches on the two outboard engines so that they were, effectively, idling at 250-350 rpm, instead of the 750-800 normally. Otherwise the best that could be done was to attack the mooring buoy with the minimum speed that allowed control of the aircraft and hope that the bow crewman could manage to grab the buoy cage going by and temporarily attach to the aircraft's bollard with a painter. A permanent attachment to the buoy's pendant was then quickly made after the aircraft was bought to a halt on its overrun and while it was being blown or washed back but before reaching the full extent of the mooring lines and the buoy's anchorage.


Access and servicing

Crew and others usually entered the aircraft through the bow compartment door on the left forward side of the aircraft. Each of the compartments, from the front, were fitted with swash doors to maintain waterproof integrity of the compartment to about two ft (600 mm) above normal water level. The doors could be opened for the less agile passengers but they were otherwise normally always kept closed. There were five doors from the front to aft separating the bow from the gun room, the ward room, the galley, the bomb room and the after compartments.


There was another external door in the tail compartment on the right side. This door was intended for boarding from a Braby (U-shaped) pontoon that was used where there was a full passenger service mooring alongside a wharf or similar. This door could also be used to accept passengers or stretcher bound patients when the aircraft was in the open water where the engines had to be kept running to maintain the aircraft's position for the approaching vessel. A pontoon boat, like this small pleasure boat, typically floats and balances by means of two pontoons mounted lengthwise. ... Metung Wharf on Bancroft Bay, Gippsland Lakes, Victoria, Australia A wharf is a fixed platform, commonly on pilings, roughly parallel to and alongside navigable water, where ships are loaded and unloaded. ...


Because the aircraft was kept facing into wind it was not very difficult for ambulatory passengers to stand on the gunwale of their boat and step up into the doorway when the boat was alongside. However, holding a small boat (such as a canoe or whaleboat) at right angles to the aircraft, so that a stretcher could be supported at the far end while it was being fed in through the doorway to a crew member inside, was fraught with difficulty, particularly if the stretcher and occupant was wider than the doorway! Normally the stretcher occupant was most at risk, with the aircraft being the next most vulnerable from the bow of the boat. The gunwale, pronounced gunnel to rhyme with tunnel, is a nautical term describing the top edge of the side of a boat. ... This article is about the boat. ... A modern copy of a traditional whaleboat on display at Mystic Seaport. ...


Normal access to the external upper parts of the aircraft was through the astrodome hatch at the front of the front spar of the wing centre section, just at the rear of the navigator's station.


Bombs were loaded in through the bomb doors that formed the upper half walls of the bomb room on both sides. The bomb racks were able to run in and out from the bomb room on tracks in the underside of the wing. Weapons were hoisted up to the extended racks that were run inboard and then were either lowered to stowages on the floor or prepared for use on the racks above. The doors were sprung loaded to pop inwards from their frames and would fall under gravity so that the racks could run out through the space left in the top of the compartment. The doors could be released locally or remotely from the pilot's position during a bomb run. Normally the weapons were either bombs or depth charges and the racks were limited to a maximum of 1,000 lb (500 kg) each. After the first salvo was dropped it was a race for the crew to get the next eight loaded before the pilot had the aircraft positioned on the next bombing run.


The fixed nose guns (introduced by the Australians) were demounted when the aircraft was waterborne and stowed in the gun room just aft of the bow compartment. The toilet was in the right half of this same compartment and stairs from the cockpit to the bow area divided the two.


Maintenance was performed on the engines by opening panels in the leading edge of the wing either side of the powerplant. A plank could be fitted across the front of the engine on the extensions of the open panels. A small manually started auxiliary petrol engine, which was fitted into the leading edge of the right wing, powered a bilge and a fuel pump for clearing water and other fluids from the fuselage bilges and for refuelling. Generally, the aircraft were reasonably water tight, and two people on a wobble pump could transfer fuel faster than the auxiliary pump.


In sheltered moorings or at sea, fuelling was accomplished by a powered or unpowered barge and with engine driven or hand powered pump(s). At regular moorings there would be specially designed refuelling barges to do the job, normally manned by trained marine crew. These vessels could refuel many aircraft during the course of the day. Handling of the fuel nozzles and opening/closing the aircraft fuel tanks would normally be an aircraftman's task. Self propelled barge carrying bulk crushed stone A barge is a flat-bottomed boat, built mainly for river and canal transport of heavy goods. ...


Where there were unreliable fuel supplies, usually at outlying moorings away from any fixed base, it might take a crew of four 3–4 hours to transfer 2,000 gallons (8,900 litres) of fuel into the aircraft. If the barge had a capacity of only about 800 gallons (as was usual) it could take three times that. Oil supplies and minor spares were carried in the aircraft at such outlying bases if the crew were operating autonomously. In serious cases, where refuelling from drums or when the supplies were otherwise in doubt, aircraft were refuelled through Chamois leather filters to separate the dirt, rust and water from the fuel. Chamois leather is leather made from the skin of the chamois, although the term is also commonly used to refer to cloths made from the skin of other animals or a synthetic material version. ...


Airframe repairs were either effected from the inside or waited until the aircraft was in a sheltered mooring, or beached. One of the serious problems was that the heat treated rivets in the hull plates were susceptible to corrosion after a period in salt water (depending on the quality of the heat treatment process). The heads would pop off, from stress corrosion, and leaks would start into the bilges. The only resort was to haul the aircraft out onto the hard and replace them; usually at the cost of many additional heads coming off because of the riveting vibrations. The bilge is the compartment at the bottom of the hull of a ship or boat where water collects so that it may be pumped out of the vessel at a later time. ...


Most maintenance and servicing personnel had tools modified to attach them to their person because dropping a tool normally meant it was gone forever. Glooped, was the explanation for the loss.


Beaching

The beaching gear was large and unwieldy. The main legs had to be ballasted to sink, wheels down, so that the leg could be raised upright into its housing under the wing centre section, and then the lower part was pressed against the fuselage wall where it was pinned. This usually meant that two people would get wet through. The tail trolley was also ballasted to sink under the aft fuselage where the seagoing section of the hull ended. The upper arms of the trolley were raised to locate in mating holes in the exterior skin of the hull where the main weight of the aircraft would ultimately keep it in place; but until then it was precariously unstable.


Meanwhile a rope from the shore to the header buoy at the nose of the aircraft was threaded through the pulley on the buoy and attached to the aircraft's bollard. The shore end of this rope was managed by a person positioned at an electric capstan that would control the release of the aircraft from the buoy. A short rope connected the tail towing eye in the fuselage to another hauling device, most often a tractor, that was able to manoeuvre the aircraft on the slipway and on the hardstanding beyond. A portion of a model depicting a manual capstan in use. ...


When all was ready the bowman cast off from the buoy pendant. The tail was pulled carefully to the slipway and the header buoy rope was paid out from the capstan off to the side. The idea was that the tail trolley should be bought into contact with the submerged section of the slipway as gently as possible, ensuring that the aircraft remained securely in place on the trolley as it started rolling up the slip. A sharp impact on the trolley wheels, located approximately five ft (1.6 m) below the keel, was enough to rotate the trolley around its fuselage attachment arms and dislodge it, allowing the aircraft's keel to strike the slip and thereby sustain damage.


When tidal flow or wind adversely affected the positioning of the aircraft, a situation could arise where the tail and attachments were running true, but the nose of the aircraft had now swung to one extreme of the slipway preventing the main wheels on one side from correctly contacting the slip. Consequently it is not surprising that Sunderlands were not beached for any minor reason.


Once the tail trolley was well up the slipway a steering arm could be inserted into the lower part of the trolley and used to turn the wheels so that the assemblage could be guided to follow the tractor. Movement in the opposite direction was effected by a bridle attached to the front of the lower part of the main legs. On the slipway the tail towing eye was used to restrain the aircraft from running away down the slope.


Damage control

The aircraft was prevented from dipping either wingtip into the water by a large float mounted under each wing on two struts that were braced inboard and outboard by wires. With no wind, the float on the heavier side was always in the water. With some wind the ailerons could be used to balance the craft with both floats out of the water. In severe weather it was not unknown for a float to strike a wave on landing (or takeoff) and to be wiped off completely or left just hanging; in which case, as the craft lost airspeed after landing, members of the crew ran out to the tip of the opposite wing to keep the serviceable float in the water while the aircraft was taxied to the mooring. Running out to the end of the wing in adverse weather was not an easy task, especially after a long patrol.


Aircraft with lower hull damage, from enemy action or otherwise, were patched or had the holes filled with any temporary materials before a landing was attempted and then it might be taxied immediately to the slipway and beached when its wheeled gear was attached, or it might be quickly beached on a sandy shore before it sank. More than two fuselage compartments had to be full of water to sink the aircraft so the damage had to be quite extensive or the distance to shore great. During the Second World War, a number of severely damaged aircraft were deliberately landed on grass airfields.


Marine growths were a constant problem in some areas. The drag caused by long standing growths could be enough to compromise the hull surface so that a fully loaded aircraft would be unable to gain enough speed to become airborne. The aircraft could be taken to a freshwater mooring for sufficient time to kill off the fauna and flora growing on the bottom which would then be washed away during takeoff runs. The alternative was to scrub it off, either in the water or on the hard. Neither was simple, especially in cold weather.


The takeoff run of a flying boat was often only dependent on the length of water that was available. The first problem was to gain sufficient speed for the craft to plane, otherwise there would never be enough speed to become airborne. Once planing, the next problem was to break free from the suction (from Bernoulli's principle) of the water on the hull. This was partly helped by the step in the hull just behind the craft's centre of buoyancy at planing speed. The pilot could rock the ship about this point to try to break the downward pull of the water on the surface of the hull. Somewhat rough water was a help in freeing the hull from the water, but on calm days it was often necessary to have a high speed launch cross in front of the aircraft to cause a break in the water flow under the aircraft. It was a matter of judgement of the coxswain to get the crossing close enough but not too close. Because it was expected that some takeoffs would be protracted affairs, often the crews were not very careful to keep within maximum all up weight limitations and getting airborne just took a little longer. In such cases the flight engineer would ignore the climbing cylinder head temperatures and maintain the use of takeoff power for more than five minutes at a time. A Musto Skiff, planing on a fast reach A planing boats hull skims across the surface of the water rather than pushing through the water in the way a traditional displacement hull works. ... Bernoullis Principle states that for an ideal fluid (low speed air is a good approximation), with no work being performed on the fluid, an increase in velocity occurs simultaneously with decrease in pressure or a change in the fluids gravitational potential energy. ... Today a Launch is a motorboat with an open or half open deck. ... The coxswain (pronounced cox-ən; often called the cox) is the person in charge of a boat, particularly its navigation and steering. ...


On Mk V aircraft, fuel could be dumped from retractable pipes that extended from the hull and were attached the bomb room side of the galley aft bulkhead. It was expected that dumping would be done while airborne, but it could also be done on the water, with care to ensure that the floating fuel went downwind away from the aircraft. A bulkhead is an upright wall within the hull of a ship. ...


Operational history

World War II

During the Second World War, although British anti-submarine efforts were disorganized and ineffectual at first, Sunderlands quickly proved useful in the rescue of the crews from torpedoed ships. On 21 September 1939, two Sunderlands rescued the entire 34-man crew of the torpedoed merchantman Kensington Court from the North Sea. As British anti-submarine measures improved the Sunderland began to show its claws as well. A Royal Australian Air Force (RAAF) Sunderland performed the type's first unassisted kill of a U-boat on 17 July 1940. is the 264th day of the year (265th in leap years) in the Gregorian calendar. ... Year 1939 (MCMXXXIX) was a common year starting on Sunday (link will display the full calendar) of the Gregorian calendar. ... The North Sea is a sea of the Atlantic Ocean, located between the coasts of Norway and Denmark in the east, the coast of the British Isles in the west, and the German, Dutch, Belgian and French coasts in the south. ... The Royal Australian Air Force (RAAF) is the Air Force branch of the Australian Defence Force. ... is the 198th day of the year (199th in leap years) in the Gregorian calendar. ... Year 1940 (MCMXL) was a leap year starting on Monday (link will display the full 1940 calendar) of the Gregorian calendar. ...


As aircrew honed their combat skills, the Sunderland Mark I received various improvements to make it more effective. The nose turret was upgraded to two .303 (7.7 mm) guns instead of one, and new propellers together with pneumatic rubber wing deicing boots were also fitted.


Although the .303 guns lacked range and hitting power, the Sunderland had a fair number of them and it was a well built machine that was hard to destroy. On 3 April 1940, a Sunderland operating off Norway was attacked by six German Junkers Ju 88 medium bombers and managed to shoot one down, damage another enough to send it off to a forced landing, and drove off the rest. The Germans are reported to have nicknamed the Sunderland the "Fliegendes Stachelschwein" (Flying Porcupine) due to its defensive firepower and to the several prominent antennas protruding from it. is the 93rd day of the year (94th in leap years) in the Gregorian calendar. ... Year 1940 (MCMXL) was a leap year starting on Monday (link will display the full 1940 calendar) of the Gregorian calendar. ... The Junkers Ju 88 was a WW2 Luftwaffe twin-engine multi-role aircraft. ...


Sunderlands also proved themselves in the Mediterranean theatre. They performed valiantly in evacuations during the German seizure of Crete, carrying a surprising number of passengers, and one performed the reconnaissance mission to observe the Italian fleet at anchor in Taranto before the famous Royal Navy Fleet Air Arm's torpedo attack on 11 November 1940; the Battle of Taranto. For other uses, see Crete (disambiguation). ... Taranto is a coastal city in Apulia, southern Italy. ... This article is about the navy of the United Kingdom. ... The Fleet Air Arm is the branch of the Royal Navy responsible for the operation of the aircraft on board their ships. ... is the 315th day of the year (316th in leap years) in the Gregorian calendar. ... Year 1940 (MCMXL) was a leap year starting on Monday (link will display the full 1940 calendar) of the Gregorian calendar. ... This article is about the 1940 battle. ...


New weapons made the flying boats more deadly in combat. In 1939, one 100 lb anti-submarine bomb hit HMS Snapper merely breaking its light bulbs whilst other bombs had reportedly bounced up and hit their launch aircraft. In early 1943 these ineffective weapons were replaced by Torpex depth charges that would sink to a predetermined depth and then explode. This eliminated the problem of bounce back, and the shock wave propagating through the water augmented the explosive effect. Torpex is a secondary explosive 50% more powerful than TNT by weight. ...


While the bright Leigh searchlight was rarely fitted to Sunderlands, ASV Mark II radar allowed the flying boats to effectively target U-boats operating on the surface. In response, the German submarines began to carry a radar warning system known as "Metox", also known as the Cross of Biscay due to the appearance of its receiving antenna that was tuned to the ASV frequency and gave the submarines early warning that an aircraft was in the area. The Leigh Light (abbreviated L/L) was a British World War II era anti submarine device used in the Second Battle of the Atlantic. ... This article or section does not cite its references or sources. ...


Kills fell off drastically until ASV Mark III radar was introduced in early 1943, which operated in the centimetric band and used antennas mounted in blisters under the wings outboard of the floats, instead of the cluttered stickleback aerials. Sunderland Mark IIIs fitted with ASV Mark III were designated Sunderland Mark IIIAs.


Centimetric radar was invisible to Metox and completely baffled the Germans at first. Admiral Karl Dönitz, commander of the German U-boat force, suspected that the British were being informed of submarine movements by spies. In August 1943, a captured RAF airman misled the Germans by telling them that the aircraft were homing on the signals radiated by the Metox,[4][5] and consequently U-boat commanders were instructed to turn them off. Karl Dönitz (IPA pronunciation:  ) (born 16 September 1891; died 24 December 1980) was a German naval leader, who commanded the German Navy (Kriegsmarine) during the second half of World War II. Dönitz was also President of Germany for 23 days after Adolf Hitlers suicide. ...


In any case, the Germans responded by fitting U-boats with one or two 37 mm and twin quad 20 mm flak guns to shoot it out with the attackers. While Sunderlands could suppress flak to an extent by hosing down the U-boat with their nose turret guns, the U-boats had the edge by far in range and hitting power. To help improve the odds, the Australians first fitted their aircraft in the field with an additional four .303s in fixed mounts in the nose, allowing the pilot to add fire while diving on the submarine before bomb release. Most aircraft were similarly modified. The addition of single .50 calibre (12.7 mm) flexibly mounted M2 Browning machine guns in the (previously emptied) beam hatches behind and above the wing trailing edge also became common. This article is about the . ...


2 June 1943

The rifle calibre .303 guns lacked hitting power, but the Sunderland retained its reputation for being able to take care of itself. This reputation was enhanced by an air battle between eight Ju 88C long range heavy fighters and a single RAAF Sunderland Mark III of No. 461 Squadron RAAF on 2 June 1943. This battle was one of several stories of the type's operations related by author Ivan Southall, who flew in Sunderlands during the war.[6] There were 11 crewmen on board the Sunderland; nine Australians and two British.[7] The crew was on an anti-submarine patrol and also searching for remains of BOAC Flight 777, an airliner that had left Lisbon the day before and subsequently had been shot down over the Bay of Biscay. The Junkers Ju 88 was a WW2 Luftwaffe twin-engine multi-role aircraft. ... A heavy fighter is a fighter aircraft designed to be used in the long-range role, or while carrying heavier weapons loads. ... A No. ... is the 153rd day of the year (154th in leap years) in the Gregorian calendar. ... Year 1943 (MCMXLIII) was a common year starting on Friday (the link will display full 1943 calendar) of the Gregorian calendar. ... BOAC Flight 777, a scheduled British Overseas Airways Corporation civilian airline flight on 1 June 1943 from Portela Airport in Lisbon, Portugal to an airport at Whitchurch near Bristol, United Kingdom, was attacked by eight German Junkers Ju 88s and crashed into the Bay of Biscay, killing several notable passengers... For other uses, see Lisbon (disambiguation). ... Map of the Bay of Biscay. ...


In the late afternoon, one of the crew spotted the eight Ju 88s. Bombs and depth charges were dumped while the pilot, Flt. Lt. Colin Walker, "redlined" the engines. Two Ju 88s made passes at the flying boat, one from each side, scoring hits and managing to disable one engine while the Sunderland went through wild "corkscrew" evasive manoeuvres. On the third pass of the fighters, the dorsal turret gunner managed to shoot one down. Another Ju 88 disabled the tail turret, but the next fighter that made a pass was hit by the dorsal and nose turrets and was shot down as well. The Junkers Ju 88 was a WW2 Luftwaffe twin-engine multi-role aircraft. ... A Flight Lieutenants sleeve/shoulder insignia Flight Lieutenant (abbreviated as Flt Lt and pronounced as flight lef-tenant, see Lieutenant) is a junior commissioned rank in the Royal Air Force and the air forces of many Commonwealth countries. ...


Still another fighter attacked, destroying the Sunderland's radio gear, wounding most of the crew in varying degrees and mortally wounding one of the side gunners (Flight Sergeant "Ted" Miles). A Ju 88 tried to attack from the rear but the tail turret gunner had managed to regain some control over the turret and shot it down. The surviving fighters continued to attack, but the nose gunner damaged one of these, setting its engines on fire. Two more of the attackers were also hit and the final pair disengaged and departed. Luftwaffe records indicate that the latter were the only two that made it back to base. Wikipedia does not have an article with this exact name. ...


The Sunderland was heavily damaged. The crew threw everything they could overboard and nursed the aircraft back to the Cornish coast, where Walker managed to land and beach it at Praa Sands. The crew waded ashore, carrying their dead comrade, while the surf broke the Sunderland up. Walker received the Distinguished Service Order and several of the other crew members also received medals. For other uses, see Cornwall (disambiguation). ... Praa Sands (properly pronounced pray; prah or prar are incorrect) is a coastal village in the Parish of Breage, located off the main road between Helston and Penzance in Cornwall, England, UK. Formerly serving the local mining industry, it is now predominantly a tourist-oriented area. ... DSO medal The Distinguished Service Order (DSO) is a military decoration of the United Kingdom, and formerly of other Commonwealth countries, awarded for meritorious or distinguished service by officers of the armed forces during wartime, typically in actual combat. ...


Walker went on to a ground job while the rest of the crew was given a new Sunderland. That Sunderland and its crew disappeared without a trace over the Bay of Biscay two months later after reporting by radio that they were under attack by six Ju 88s.


Postwar

At the end of the Second World War, a number of new Sunderlands built at Belfast were simply taken out to sea and scuttled as there was nothing else to do with them. Despite this indignity, there was plenty of life left in the Sunderland. In Europe it was removed from service relatively quickly; however, in the Far East, where well developed runways were less common and large land based maritime patrol aircraft like the new Avro Shackleton could not be used so easily, there was still a need for it, and it remained in service with the Far East Air Force at Singapore until 1959, and with the Royal New Zealand Air Force's No. 5 Squadron RNZAF and No. 6 Squadron RNZAF until 1967. A former RNZAF Sunderland that is yet to be restored is exhibited at the Museum of Transport and Technology, Auckland. This article is about the city in Northern Ireland. ... The Shackleton was a Royal Air Force long-range patrol bomber developed from the Avro Lincoln bomber with a new fuselage. ... The RAF Far East Air Force was the command organisation that controlled all Royal Air Force assets in the east of Asia. ... The Royal New Zealand Air Force (RNZAF) is the air force arm of the New Zealand Defence Force. ... At the outbreak of hostilities in the Pacific, operated Short Singapores from Fiji against Japan on maratime patrol and antisubmarine duties. ... A Seasprite of No. ... The Museum of Transport and Technology (MOTAT) is a museum located in Western Springs, Auckland, New Zealand. ... For other uses, see Auckland (disambiguation). ...

A RNZAF Sunderland MR.5 with a USN P-5 and a RAAF P-2 in 1963
A RNZAF Sunderland MR.5 with a USN P-5 and a RAAF P-2 in 1963

During the Berlin Airlift (which lasted from June 1948 until August 1949) ten Sunderlands and two Hythes were used to transport goods—especially salt— from Finkenwerder on the Elbe near Hamburg to the isolated city, landing on the Havelsee lake beside RAF Gatow until it iced over.[8] This is the only known operational use of flying boats within central Europe. The Soviet Union blocked Western rail and road access to West Berlin from June 24, 1948 - May 11, 1949. ... First Touch Down of A380 in Finkenwerder Hamburg Finkenwerder Airport (IATA: XFW, ICAO: EDHI) is an airport in the southwest part of Hamburg, Germany. ... This article is about a river in Central Europe. ... For other uses, see Hamburg (disambiguation). ... Havelsee is a town in the Potsdam-Mittelmark district, in Brandenburg, Germany. ... Gatow Airport is an airport in the city of Berlin, Germany. ...


The French Navy Escadrille 7FE, which received Sunderlands when it was formed in 1943 as No. 343 Squadron RAF, continued to operate them until December 1960, the last unit to operate Sunderlands in the Northern Hemisphere.[9] The French Navy, officially called the National Navy (French: Marine Nationale) is the maritime arm of the French military. ...


RAF Sunderlands also saw service in the Korean War with No. 209 Squadron RAF,[10] and with the Royal New Zealand Air Force until the mid-1960s.[11] Belligerents United Nations: Republic of Korea Australia Belgium Canada Colombia Ethiopia France Greece Luxembourg Netherlands New Zealand Philippines South Africa Thailand Turkey United Kingdom United States Naval Support and Military Servicing/Repairs: Japan Medical staff: Denmark Italy Norway India Sweden DPR Korea PR China Soviet Union Commanders Syngman Rhee Chung... The Royal New Zealand Air Force (RNZAF) is the air force arm of the New Zealand Defence Force. ...


Variants

Prototype

The first S.25, now named the Sunderland Mark I, flew from the River Medway on 16 October 1937. The deeper hull and installation of nose and tail turrets gave the Sunderland a considerably different appearance from the Empire flying boats. The prototype was fitted with Bristol Pegasus X engines, each providing 709 kW (950 hp), as the planned Pegasus XXII engines of 753 kW (1,010 hp) were not available at the time. Rivers in Kent, showing the Medway. ... is the 289th day of the year (290th in leap years) in the Gregorian calendar. ... Year 1937 (MCMXXXVII) was a common year starting on Friday (link will display the full calendar) of the Gregorian calendar. ... Bristol Pegasus piston engine The Pegasus was a 9 cylinder one_row radial aircraft engine designed as the follow-on to the Bristol Aeroplane Companys very successful Bristol Jupiter, following lessons learned in the Mercury effort. ...


The 37 mm gun, originally intended as a primary anti-submarine weapon, was dropped from the plans during the prototype phase and replaced with a Nash & Thomson FN-11 nose turret mounting a single .303 inch (7.7 mm) Vickers GO machine gun. The turret could be winched back into the nose, revealing a small "deck" and demountable marine bollard used during mooring manoeuvres on the water. The change of armament in the nose to the much lighter gun moved the centre of gravity rearwards. .303 cartridge The . ... Vickers Gas Operated Type Machine gun Nationality UK Era History Date of design Production period Service duration Operators UK War service Specifications Type Calibre 0. ... // A bollard is a short vertical post. ... In physics, the center of gravity (CoG) of an object is the average location of its weight. ...


After the first series of flights the aircraft was returned to the workshop and the wing was swept 4.25° to the rear, thereby moving the centre of pressure into a more reasonable position in relation to the new centre of gravity. This left the engines and wing floats canted out from the aircraft's centreline. Although the wing loading was much higher than that of any previous RAF flying boat a new flap system kept the takeoff run to a reasonable length and the aircraft first flew with the new wing sweep and the uprated Pegasus XXII engines on 7 March 1938. The Center of Pressure (or CoP) is the point on an aircraft where all of the aerodynamic forces act. ... RAF redirects here. ... Flaps are hinged surfaces on the trailing edge of an airplane wing which, when deployed, increase the lift (and drag) of a wing by changing the camber of the airfoil. ... is the 66th day of the year (67th in leap years) in the Gregorian calendar. ... Year 1938 (MCMXXXVIII) was a common year starting on Saturday (link will display the full calendar) of the Gregorian calendar. ...


Official enthusiasm for the type had been so great that in March 1936, well before the first flight of the prototype, the Air Ministry ordered 21 production examples.


Meanwhile, delivery of the Saro A33 was delayed and it did not fly until October 1938. The aircraft was written off after it suffered structural failure during high speed taxi trials and no other prototypes were built.


Sunderland Mark I

The RAF received its first Sunderland Mark I in June 1938 when the second production aircraft (L2159) was flown to 230 Squadron at RAF Seletar, Singapore. By the outbreak of war in Europe, in September 1939, RAF Coastal Command was operating 40 Sunderlands. No. ... RAF Seletar was a Royal Air Force station in Singapore. ... Coastal Command was an organization within the Royal Air Force tasked with protecting the United Kingdom from naval threats. ...


The main offensive load was up to 2,000 lb (907 kg) of bombs (usually 250 or 500 lb), mines (1,000 lb) or other stores that were hung on traversing racks under the wing centre section (to and from the bomb room in the fuselage). Later, depth charges (usually 250 lb) were added. By late 1940 two Vickers K machine guns had been added to new hatches that were inserted into the upper sides of the fuselage just aft of the wing, with appropriate slipstream deflectors. A second gun was added to the nose turret. This article is about explosive devices. ... The El Chino Mine located near Silver City, New Mexico is an open-pit copper mine Mining is the extraction of valuable minerals or other geological materials from the earth, usually (but not always) from an ore body, vein, or (coal) seam. ... Depth Charge used by U.S. Navy later in World War II The depth charge is the oldest anti-submarine weapon. ... The Vickers K gun known as the Vickers Gas Operated (VGO) in British service, was a rapid firing machine gun developed for use by observers in aircraft. ...


New constant speeding propellers and deicing boots were installed during 1940 too.


As the defensive weaponry improved the aircraft became a formidable foe, even though it was far from base, travelled fairly slowly (120 kts and down to about 90 for long range cruise) and was usually at low altitude. But a Sunderland off Norway on 3 April 1940 was attacked by six Junkers Ju 88 with the result that one was shot down, one forced to immediately land and the others went home, much wiser. Later, over the Bay of Biscay eight JU 88 attacked one Sunderland escorting a convoy and three were shot down by the patrol aircraft. The Junkers Ju 88 was a WW2 Luftwaffe twin-engine multi-role aircraft. ...


A Sunderland made the vital reconnaissance of Taranto before the FAAs attack on the Regia Marina on 11 November 1940. Taranto is a coastal city in Apulia, southern Italy. ... The Fleet Air Arm is the branch of the Royal Navy responsible for the operation of the aircraft on board their ships. ... The Italian Regia Marina (literally: Royal Navy) dates from the proclamation of the Kingdom of Italy in 1861 after Italian unification. ...


The aircraft was not a great success at landing and taking off from rough water, but, other than in the open sea, it could be handled onto and off a short chop, by a skilled pilot. Many rescues were made, early in the war, of crews that were in the channel having abandoned or ditched their aircraft, or abandoned their ship. In May 1941, during the Battle of Crete Sunderland transported as many as 82 armed men from place to place in one load. Steep ocean swells were never attempted, however a calm ocean could be suitable for landing and takeoff. Combatants Greece United Kingdom New Zealand Australia Nazi Germany Kingdom of Italy Commanders Bernard Freyberg Kurt Student Strength United Kingdom: 15,000 Greece: 11,000 Australia: 7,100 New Zealand: 6,700 Total: 40,000 (10,000 without fighting capacity[2]) Germany: 14,000 paratroopers 15,000 mountain troopers 280...


Beginning in October 1941, Sunderlands were fitted with ASV Mark II radar (Air to Surface Vessel). This was a primitive low frequency radar system operating at a wavelength of 1.5 m, featuring a row of four prominent "stickleback" yagi antennas on top of the rear fuselage, two rows of four smaller aerials on either side of the fuselage beneath the stickleback antennas, and a single receiving aerial mounted under each wing outboard of the float and angled outward. For other uses, see Radar (disambiguation). ... A Yagi-Uda antenna. ...


A total of 75 Sunderland Mark I were built: 60 at Shorts' factories at Rochester, England and Belfast, Northern Ireland, and 15 by Blackburn Aircraft at Dumbarton. , Rochester is a town in Kent, England, at the lowest bridging point of the River Medway about 30 miles (50 km) from London. ... This article is about the city of Belfast in Northern Ireland. ... Blackburn Beverley photographed in 1964. ... Dumbarton (Dùn Breatainn in Scottish Gaelic) is a burgh in Scotland, lying on the north bank of the River Clyde where the River Leven flows into the Clyde estuary. ...


The RAF allocated the AP1566 series of air publications to the Sunderland.


Sunderland Mark II

In August 1941, production moved to the Sunderland Mark II that featured Pegasus XVIII engines with two speed superchargers, providing 794 kW (1,065 hp) each.


The tail turret was changed to an FN.4A turret that retained the four .303 (7.7 mm) guns of its predecessor but provided twice the ammunition capacity with 1,000 rounds per gun. Late production Mark IIs also had an FN.7 dorsal turret, mounted offset to the right just behind the wings and fitted with twin .303 (7.7 mm) machine guns. The hand held guns behind the wing were removed in these versions.


Only 43 Mark IIs were built, with five manufactured by Blackburn.


Sunderland Mark III

A Sunderland Mark III operated by No. 461 Squadron RAAF
A Sunderland Mark III operated by No. 461 Squadron RAAF

Production quickly went on in December 1941 to the Sunderland Mark III,[12] which featured a revised hull configuration as tested on a Mark I the previous June. This modification improved seaworthiness, which had suffered as the weight of the Sunderland increased with new marks and field changes. In earlier Sunderlands, the hull "step" that allows a flying boat to "unstick" from the surface of the sea was an abrupt one, but in the Mk III it was a curve upwards from the forward hull line. Image File history File linksMetadata 461_Sqn_Sunderland_(AWM_P01520. ... Image File history File linksMetadata 461_Sqn_Sunderland_(AWM_P01520. ... A No. ...


The Mark III turned out to be the definitive Sunderland variant, with 461 built. Most were built by Shorts at Rochester and Belfast, a further 35 at a new (but temporary)[13] Shorts plant at White Cross Bay, Lake Windermere;[14][15] while 170 were built by Blackburn Aircraft. The Sunderland Mark III proved to be one of the RAF Coastal Command's major weapons against the U-boats, along with the Consolidated PBY Catalina. Lake Windermere Windermere is the largest natural lake in England, and is entirely within in the Lake District National Park. ... Blackburn Beverley photographed in 1964. ... Consolidated may refer to: Consolidated (band) Consolidated Aircraft (later Convair) the aircraft manufacturer This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. ... PBY Catalina was the United States Navy designation for an American and Canadian-built flying boat of the 1930s and 1940s. ...


As the U-boats began to use Metox passive receivers the ASV Mk II became a good signal that an aircraft was in the area, and the number of sightings diminished drastically. The RAF response was to upgrade to ASV Mk III, operating in the 50 cm band, with antennas that could be faired into fewer more streamlined blisters. During the Mk III's life there were a large number of almost continuous improvements made. ASV Mk IIIA, four more machine guns in a fixed position in the wall of the forward fuselage just behind the turret (developed on RAAF aircraft first) with a simple bead and ring sight for the pilot. U-boat is also a nickname for some diesel locomotives built by GE; see List of GE locomotives October 1939. ...


While early guns were provided with only 500 rounds each you can bet that some gunners took more rounds than were authorised because 14-hour patrols were certain to run into trouble in some operating areas, and for many hours on end. Later, 1,000 round ammunition boxes were installed in the turrets. The beam hatch guns were removed a from Mk II aircraft but Mk IIIs and then Mk Is gained much more capable .5 guns, one each side. This article is about the . ...


Offensive weapons loads increased too. The introduction of the hydrostatically fused 250 lb (114 kg) depth charge meant that additional weapons could be carried on the floor of the bomb room in wooden restraints, along with ammunition boxes of 10 and 25 lb anti-personnel bombs that could be hand launched from various hatches to harass U-boat crews manning their twin 37 and dual quadruple 20&nbspmm cannons. Depth Charge used by U.S. Navy later in World War II The depth charge is the oldest anti-submarine weapon. ...


As the radar units became more effective there were more night patrols to catch U-boats on the surface charging their batteries. But attacking them in the dark was a problem that was solved by carrying one inch (25.4 mm), electrically initiated flares and dropping then out of the rear chute in the aircraft as it got close to the surface vessel. Sunderlands never carried Leigh lights, probably because the flares were sufficient. The Leigh Light (abbreviated L/L) was a British World War II era anti submarine device used in the Second Battle of the Atlantic. ...


By this time the crew workload had increased so much that it needed at least 10 to crew the aircraft. During attacks they were sorely pressed to get all of the necessary work done and crews took many shortcuts that possibly proved fatal in some cases.


In early 1944 the ordinance load in the aircraft and the length of patrols, meaning maximum fuel loads, required that much more powerful engines were needed. It was decided to fit 1,200 hp (898 kW) P&W R1830-90B, Twin Wasp, powerplants. These were commonly available and maintenance crews on Catalina, Liberator and Dakota aircraft were familiar with them. This lead to the production of the Mk V aircraft. Categories: Stub | Aircraft piston engines ... Catalina may refer to: In geography: Catalina, Arizona Catalina, Romania Santa Catalina, Ilocos Sur Santa Catalina, Negros Oriental Santa Catalina Island, California Santa Catalina Mountains Catalina, New South Wales Cătălina, Romania In transportation: Catalina 30, twenty nine foot 10 inch long fiberglass sailboat first produced in 1974 by... The Consolidated B-24 Liberator was an American heavy bomber that was produced in greater numbers than any other American combat aircraft during World War II and still holds the record as the most produced allied aircraft. ... The Douglas C-47 Skytrain or Dakota is a military transport that was developed from the Douglas DC-3 airliner. ...


Sunderland Mark IV

Main article: Short Seaford

The Sunderland Mark IV was an outgrowth of the 1942 Air Ministry Specification R.8/42, for a generally improved Sunderland with more powerful Bristol Hercules engines, better defensive armament and other enhancements. The new Sunderland was intended for service in the Pacific. Although initially developed and two prototypes built as the "Sunderland Mark IV" it was different enough from the Sunderland line to be given a different name, the S.45 Seaford. An alternative name for the Short Sunderland Mark IV. ... Bristol Hercules engine The Hercules was a 14_cylinder two_row radial aircraft engine produced by the Bristol Engine Company starting in 1939. ... For other meanings of Pacific, see Pacific (disambiguation). ...


Relative to the Mark III, the Mark IV had a stronger wing, larger tailplanes and a longer fuselage with some changes in form for better performance in the water. The armament was heavier with .50 inch (12.7 mm) machine guns and 20 mm Hispano cannon. The Hispano Suiza 20 mm cannon was one of the most widely used aircraft weapons of the 20th century, used by British, American, French, and many other military services. ...


The changes were so substantial that the new aircraft was redesignated the Short Seaford. Thirty production examples were ordered; the first delivered too late to see combat and only eight production Seafords were completed and never got beyond operational trials with the RAF. An alternative name for the Short Sunderland Mark IV. ...


Sunderland Mark V

A Sunderland Mk. V
A Sunderland Mk. V

The next production version was the Sunderland Mark V, which evolved out of crew concerns over the lack of power of the Pegasus engines. The weight creep (partly due to the addition of radar) that afflicted the Sunderland had resulted in running the Pegasus engines at combat power as a normal procedure and the overburdened engines had to be replaced regularly.


Australian Sunderland crews suggested that the Pegasus engines be replaced by Pratt & Whitney R-1830-9OB Twin Wasp engines. The 14-cylinder engines provided 895 kW (1,200 hp) each and were in use on RAF Consolidated Catalinas and Douglas Dakotas, making logistics and maintenance straightforward. Categories: Stub | Aircraft piston engines ... The PBY Catalina was the definitive air-sea rescue aircraft of the 1930s and 1940s. ... Douglas DC-3 VH-AES at Avalon in 2003. ...


Two Mark IIIs were taken off the production lines in early 1944 and fitted with the American engines. Trials were conducted in early 1944 and the conversion proved all that was expected. The new engines (and propellors) provided greater performance with no real penalty in range. In particular, a Twin Wasp Sunderland could stay airborne if two engines were knocked out on the same wing while, in similar circumstances, a standard Mark III would steadily lose altitude.


Production was switched to the Twin Wasp version and the first Mark V reached operational units in February 1945. Defensive armament fits were similar to those of the Mark III, but the Mark V was equipped with new centimetric ASV Mark VI C radar that had been used on some of the last production Mark IIIs as well.


One hundred and fifty-five Sunderland Mark Vs were built and another 33 Mark IIIs were converted to Mark V specification. With the end of the war, large contracts for the Sunderland were cancelled and the last of these great flying boats was delivered in June 1946, with a total production of 749 aircraft.


Transport variants

In late 1942, the British Overseas Airways Corporation (BOAC) obtained six Sunderland Mark IIIs and modified them for service as mail carriers to Nigeria and India, with primitive accommodation for seven passengers. Armament was removed, with gun positions being faired over, and simple seating fitted in place of the bunks. As such they were operated by BOAC and the RAF jointly from Poole to Lagos and Calcutta. Minor modifications to the engine angles and flight angle resulted in a significant increase in the cruise speed, which was a relatively unimportant issue for the combat Sunderlands. In the immediate postwar period, locally modified ex-RNZAF Mark IIIs were used by New Zealand's National Airways Corporation to link South Pacific Islands in the Coral Route before TEAL Short Sandringhams took over after 1947. Year 1942 (MCMXLII) was a common year starting on Thursday (the link will display the full 1942 calendar) of the Gregorian calendar. ... BOAC Logo The British Overseas Airways Corporation (BOAC) was the British state airline from 1939 until 1946 and the long-haul British state airline from 1946. ... Poole is a coastal town, port and tourist destination, situated on the shores of the English Channel, in the ceremonial county of Dorset in southern England. ... This article is on Calcutta/Kolkata, the city. ... The Royal New Zealand Air Force or RNZAF is the air operations arm of the New Zealand Defence Force. ... National Airways Corporation was the national domestic airline of New Zealand. ... Tasman Empire Airways Limited (TEAL) was the forerunner of Air New Zealand. ... The Short Sandringham was an airliner derivative of the Short Sunderland military flying boat. ...


BOAC obtained more Mark IIIs and gradually came up with better accommodation for 24 passengers, including sleeping berths for 16. These conversions were given the name Hythe and BOAC operated 29 of them by the end of the war.


A more polished civilian conversion of the Sunderland was completed by the manufacturer as the postwar Short Sandringham. The Sandringham Mk.I used Pegasus engines while the Mk.II used Twin Wasp engines. The Short Sandringham was an airliner derivative of the Short Sunderland military flying boat. ...


Operators

Military operators

Flag of Australia Australia
No. 10 Squadron RAAF
No. 40 Squadron RAAF
No. 461 Squadron RAAF
Flag of Canada Canada
Royal Canadian Air Force
No. 422 Squadron RCAF
No. 423 Squadron RCAF
No. 461 Squadron RCAF
Flag of France France
French Navy
No. 343 Squadron RAF, later Escadrille 7FE[16]
Flottille 1FE
Flottille 7F
Flottille 27F
Escadrilles 12S
Escadrilles 50S
Escadrilles 53S
Flag of New Zealand New Zealand
No. 5 Squadron RNZAF
No. 6 Squadron RNZAF
No. 490 Squadron RNZAF
Flag of Norway Norway
Norwegian Air Force
No. 330 Squadron RAF
Flag of Portugal Portugal
Flag of South Africa South Africa
No. 35 Squadron SAAF
Flag of the United Kingdom United Kingdom
No. 85 Squadron RAF
No. 88 Squadron RAF
No. 95 Squadron RAF
No. 119 Squadron RAF
No. 201 Squadron RAF
No. 202 Squadron RAF
No. 204 Squadron RAF
No. 205 Squadron RAF
No. 209 Squadron RAF
No. 210 Squadron RAF
No. 228 Squadron RAF
No. 230 Squadron RAF
No. 240 Squadron RAF
No. 246 Squadron RAF
No. 259 Squadron RAF
No. 270 Squadron RAF
No. 235 Operational Conversion Unit RAF

Image File history File links This is a lossless scalable vector image. ... The Royal Australian Air Force (RAAF) is the Air Force branch of the Australian Defence Force. ... No. ... No. ... A No. ... Image File history File links This is a lossless scalable vector image. ... “RCAF” redirects here. ... Image File history File links This is a lossless scalable vector image. ... The French Navy, officially called the National Navy (French: Marine Nationale) is the maritime arm of the French military. ... Image File history File links Flag_of_New_Zealand. ... The Royal New Zealand Air Force (RNZAF) is the air force arm of the New Zealand Defence Force. ... At the outbreak of hostilities in the Pacific, operated Short Singapores from Fiji against Japan on maratime patrol and antisubmarine duties. ... A Seasprite of No. ... Also known as 490 (NZ) Squadron, Royal Air Force Fortunate as the New Zealand squadron of the RAF which saw the least action, 490 formed 28 March 1943 with Royal New Zealand Air Force aircrew at Jui near Freetown in West Africa under Wing Commander D W Baird. ... Image File history File links Flag_of_Norway. ... Ranks Norwegian military ranks Luftforsvaret or the Royal Norwegian Air Force (RNoAF) is the air force of Norway. ... No. ... Image File history File links Flag_of_Portugal. ... Portuguese naval jack The Portuguese Navy (Portuguese: Marinha Portuguesa, also known as Marinha de Guerra Portuguesa or as Armada Portuguesa) is the naval branch of the Portuguese Armed Forces which, in cooperation with the other branches of the Portuguese military, is charged with the defence of Portugal. ... Image File history File links Flag_of_South_Africa. ... The South African Air Force (SAAF) (Afrikaans: Suid-Afrikaanse Lugmag) is the air force of South Africa. ... 35 Squadron SAAF is a squadron of the South African Air Force. ... Image File history File links Flag_of_the_United_Kingdom. ... RAF redirects here. ... Categories: | ... Epitoma Formed too late to take part in the First World War, 120 Squadron spent 1918 and 1919 flying communication and mail flights in Western Europe until it was disbanded late in 1919. ... No. ... No. ... No. ...

Commercial operators

Aerol neas Argentinas is Argentinas largest domestic and international airline. ... Ansett Australia or Ansett was a major Australian domestic and international airline, flying many passengers around Australia and to many destinations in Asia at its height in 1996. ... Rose Bay is a harbourside, eastern suburb of Sydney, in the state of New South Wales, Australia. ... For other uses, see Port Jackson (disambiguation). ... For the island off Solomon Islands, see Ontong Java Atoll Lord Howe Island is a small island in the Pacific Ocean 600 km (373 mi) east of the Australian mainland. ... is the 253rd day of the year (254th in leap years) in the Gregorian calendar. ... Year 1974 (MCMLXXIV) was a common year starting on Tuesday (link will display full calendar) of the 1974 Gregorian calendar. ... Aquila Airways was founded by Barry Aikman using two ex Royal Air Force Short Sunderland flying boats for freight work. ... After technical problems with the Comet, BOAC resumed jet service with imported Boeing 707s. ... Det Norske Luftfartselskap, DNL, Norways flag carrier between 1933 and 1948. ... Scandinavian Airlines System or SAS is a multi-national airline for Denmark, Norway and Sweden, and the leading carrier in the Scandinavian countries, based in Stockholm, Sweden and owned by SAS AB. It is a founding member of the Star Alliance. ... National Airways Corporation was the national domestic airline of New Zealand. ... Qantas Airways Limited (IPA: ) is the national airline of Australia. ... Tasman Empire Airways Limited (TEAL) was the forerunner of Air New Zealand. ...

Specifications (Sunderland III)

Data from Jane's Fighting Aircraft of World War II[18]


General characteristics

  • Crew: 8—11 (two pilots, radio operator, navigator, engineer, bomb-aimer, three to five gunners)
  • Length: 85 ft 4 in (26.0 m)
  • Wingspan: 112 ft 9½ in (34.39 m)
  • Height: 32 ft 10½ in (10 m)
  • Wing area: 1,487 ft² (138 m²)
  • Empty weight: 34,500 lb (15,663 kg)
  • Loaded weight: 58,000 lb (26,332 kg)
  • Powerplant:Bristol Pegasus XVIII nine-cylinder radial engines, 1,065 hp (794 kW) each

The distance AB is the wing span of this Aer Lingus Airbus A320. ... Bristol Pegasus piston engine The Pegasus was a 9 cylinder one_row radial aircraft engine designed as the follow-on to the Bristol Aeroplane Companys very successful Bristol Jupiter, following lessons learned in the Mercury effort. ... The radial engine is an internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel. ...

Performance

V speeds are speeds that define certain performance and limiting characteristics of an aircraft. ... V speeds are speeds that define certain performance and limiting characteristics of an aircraft. ... Stall speed is an aerodynamic term. ... The maximal total range is the distance an aircraft can fly between takeoff and landing, as limited by fuel capacity in powered aircraft, or cross-country speed and environmental conditions in unpowered aircraft. ... In aeronautics, a ceiling is the maximum density altitude an aircraft can reach under a set of conditons The service ceiling attempts to capture the maximum usable altitude of an aircraft. ... This page is a candidate to be moved to Wiktionary. ... In aerodynamics, wing loading is the loaded weight of the aircraft divided by the area of the wing. ... Power-to-weight ratio is a measure commonly used when comparing various vehicles (or engines), including automobiles, motorcycles and aircraft. ...

Armament

  • up to 16× 0.303 inch (7.7 mm) Browning machine guns
  • Browning 0.5 inch (12.7 mm) machine gun
  • various defensive and offensive munitions, including bombs, mines and depth charges carried internally and, some, winched out beneath the wings. Manually launched flares, sea markers and smoke-floats.

.303 cartridge The . ... The Browning M1919 was a . ... This article is about the . ...

See also

Related development Gatow Airport is an airport in the city of Berlin, Germany. ...

Comparable aircraft The Short Sandringham was an airliner derivative of the Short Sunderland military flying boat. ... An alternative name for the Short Sunderland Mark IV. ... The Stirling was a World War II heavy bomber design built by Short Brothers. ...

Related lists The Kawanishi H8K (二式大型飛行艇, Type 2 Large Flying Boat. ... PBM-3 Mariner of the U.S. Navy. ... ... An early PB2Y-2 in flight. ... The Saunders-Roe (Saro) S.36 Lerwick was a Second World War reconnaissance monoplane flying-boat of the RAF, replacing the biplane Londons. ...

Many aircraft types have served in the Royal Air Force since it was formed in 1918 by the merger of the Royal Flying Corps and Royal Naval Air Service. ...

References

Notes

  1. ^ a b c Eden 2004, p. 442.
  2. ^ Eden 2004, p. 443.
  3. ^ Eden 2004, p. 443–444.
  4. ^ Johnson 1978, p. 229.
  5. ^ Miller, David. U-Boats: The Illustrated History of The Raiders of The Deep. London: Brassey's Inc., 2002. ISBN 1-57488-246-5.
  6. ^ Southall, Ivan. Fly West. Woomera: Australia: Angus and Robertson, 1976. ISBN 0-20713-002-7.
  7. ^ Flight Lieutenant Colin B. Walker (RAAF), Flight Sergeant E.C.E. "Ted" Miles (RAF, killed), F/Sgt Fuller (RAF), F/O Dowling, F/Sgt Miller, F/O Amiss, Sgt Lane, F/O Simpson, Sgt Watson, F/Sgt Goode, Sgt Turner (all RAAF)
  8. ^ The Berlin Blockade. Spiritus Temporis history Community Retrieved: 28 January 2007.
  9. ^ Barnes and James 1989, p. 559.
  10. ^ Image of four Sunderlands over RAF Seletar, Singapore
  11. ^ RNZAF Sunderlands
  12. ^ Eden 2004, p. 444–445.
  13. ^ The agreement with the Friends of the Lake District for the factory to be constructed on Windermere was conditional on its being dismantled when no longer needed. This agreement was kept and not a trace exists of the factory which had once boasted some of the largest aircraft hangars in the World
  14. ^ The Westmoreland Gazette archives 28 November 2002
  15. ^ The Way We Were—Lakeland Industries
  16. ^ Barnes and James 1989, p. 359.
  17. ^ Kiwi Aircraft Images.
  18. ^ Bridgman 1946, p. 137.

is the 28th day of the year in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 332nd day of the year (333rd in leap years) in the Gregorian calendar. ... Also see: 2002 (number). ...

Bibliography

  • Barnes C.H. and James, Derek N. Shorts Aircraft since 1900. London: Putnam, 1989. ISBN 0-85177-819-4.
  • Bridgman, Leonard, ed. “The Short S-25 Sunderland.” Jane’s Fighting Aircraft of World War II. London: Studio, 1946. ISBN 1-85170-493-0.
  • Eden, Paul, ed. The Encyclopedia of Aircraft of WW II. Leicester, UK: Silverdale Books/Bookmart Ltd, 2004. ISBN 1-84509-013-6.
  • Grant, Mark. Australian Airpower 1914 to 1945. Marrickville, NSW: Topmill P/L, 1996. ISBN 1-876043-28-8.
  • Johnson, Brian. The Secret War. London: BBC (British Broadcasting Corporation), 1978. ISBN 0-56317-769-1.
  • Short Sunderland (AP1566). (Suffixes A through E for Mk I through V, -PN and Vols 1 through 4 for Pilots Notes, General Description, Maintenance, Overhaul and Parts Manuals) London: RAF (Air Publication), 1945.

External links

Wikimedia Commons has media related to:
  • Fighting the U-boats: Short Sunderland
  • Video of static preserved exhibit at IWM Duxford
Aviation encompasses all the activities relating to airborne devices created by human ingenuity, generally known as aircraft. ... This is a timeline of aviation history. ... This list of aircraft is sorted alphabetically, beginning with the name of the manufacturer (or, in certain cases, designer). ... This is a list of aircraft manufacturers (in alphabetic order). ... List of aircraft engines: // Two- and four-stroke rotary, radial, inline. ... This is a list of aircraft engine manufacturers both past and present. ... This is a list of airlines in operation (by continents and country). ... This is a list of air forces, sorted alphabetically by country, followed by a list of former countries air forces. ... This is an incomplete list of aircraft weapons, past and present. ... Below is a list of (links to pages on) missiles, sorted alphabetically by name. ... A Boeing 720 being flown under remote control as part of NASAs Controlled Impact Demonstration The following is a list of Unmanned aerial vehicles developed and operated by various countries around the world. ... This is a list of experimental aircraft. ... The SR-71 Blackbird is the current record holder. ... Flight distance records without refueling. ... It has been suggested that this article or section be merged with List of altitude records reached by different aircraft types. ... The flight endurance record is the amount of time spent in the air. ... Aircraft with a production run greater than 5,000 aircraft. ...

  Results from FactBites:
 
Short Sunderland MR5 airplane pictures & aircraft photos - RAF Museums (214 words)
Seven hundred and forty-nine Sunderlands were built, and they served throughout the war.
The Sunderland finally retired from RAF service in 1959 when the last aircraft were scrapped at RAF Seletar, Singapore.
The Sunderland was produced as a military development of the 'C'-Class Empire flying-boat operated by Imperial Airways.
Short Sunderland - Definition, explanation (3127 words)
The Sunderland, S.25, was a flying boat patrol bomber, developed for the Royal Air Force by Short Brothers, based on their successful S.23 Empire flying boats, the flagship of Imperial Airways.
On 3 April 1940, a Sunderland operating off Norway was attacked by six German Junkers Ju 88 fighters, and managed to shoot one down, damage another enough to send it off to a forced landing, and drive off the rest.
A total of 75 Sunderland Mark Is were built, produced at Shorts factories at Rochester, England and Belfast, Northern Ireland, as well as 15 of the 75 built by Blackburn Aircraft at Dumbarton.
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