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Encyclopedia > Turn and bank indicator
Turn and Bank Indicator, also called a Turn and Slip
Turn and Bank Indicator, also called a Turn and Slip
Turn coordinator. Note that angle of bank is not sensed directly, this indication is showing a rate one turn to the right based on the (simple) rate gyro in the insrtument
Turn coordinator. Note that angle of bank is not sensed directly, this indication is showing a rate one turn to the right based on the (simple) rate gyro in the insrtument

In aviation, the turn and bank indicator shows both the rate of turn and the coordination (slip or skid) of the turn. The rate of turn is indicated from a rate gyroscopically and the coordination of the turn is shown by either a pendulum or a heavy ball mounted in a curved sealed glass tube. No pitch information is provided. Wikipedia does not have an article with this exact name. ... Illustration of the face of a turn-and-slip indicator This article is about aircraft instruments. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Aviation refers to flying using aircraft, machines designed by humans for atmospheric flight. ... A gyroscope For other uses, see Gyroscope (disambiguation). ... Simple gravity pendulum assumes no air resistance and no friction of/at the nail/screw. ...


A more correct term for this instrument is Turn and Slip. This is more correct because is it not the aircraft angle of bank that is sensed, for this an Artificial Horizon (AH) instrument or equivalent is required. Attitude indicator (with integrated localizer and glideslope indicators) Drawing An attitude indicator (AI) or artificial horizon is an instrument used in an aircraft to inform the pilot of the orientation of the airplane relative to the ground. ...


The rate of turn is the actual rate at which the airplane is changing its heading, sensed by a simple rate gyro held in gymbals and restrained by springs. Tick marks, sometimes called "dog houses" on some makes of instruments because of their shape, generally show a 'standard rate turn'. The standard rate (Rate One) for most airplanes is 3 degrees per second, or 2 minutes per 360 degrees. In cloud, using these figures "timed turns" can be made in order to conform with the required Air Traffic patterns. For a change of heading of 90 degrees, a rate 1 turn for 30 seconds is required. This article is about aviation. ...


The ball or pendulum indicator senses side-force at the instrument. This detects whether the aircraft is side-slipping during a turn. In a properly co-ordinated turn, no side-slip should be present because it causes extra aerodynamic drag. This is because side-slip is when the airflow is at a lateral (sideways) angle to the centre-line of the fuelage. Such a lateral airflow angle is conventionally known as "Beta", compared to the angle of the wing chord to the airflow which is known as "alpha", the so-called "angle of attack".


In slow speed aircraft such as gliders, a so-called "yaw string" can be fitted on the outside of the cockpit canopy. This senses the sideslip (beta) angle directly and the pilot can make corrections to "keep the string in the middle". It often consists of a piece of wool 3 or 4 inches (8 or 10 centimetres) long. The yaw string serves the same purpose as the ball in the turn and slip indicator except that it is more sensitive and removes the need to look at the instrument panel.


 
 

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