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Encyclopedia > SNECMA Atar Volant

The original Atar Volant or C.400 P1 was a turbojet engine produced by SNECMA (Société National d'Etude et de Construction de Moteurs d'Aviation) engineers, as part of their 'Atar' series. Encased in a basic fairing which could hold fuel and remote-control equipment, the unit weighed 5,600 pounds (2545.5 kg)[1] and generated a thrust of approximately 6,200 pounds; the Atar Volant was able to cause vertical lift, which was precisely its purpose. There were later Atar Volant models, each made improvements and alterations to the previous designs, and eventually resulted in a fully-fledged craft. Turbojets are the simplest and oldest kind of general purpose jet engine. ... An engine is something that produces an effect from a given input. ... Snecma was one of the worlds leading aerospace corporations which merged with SAGEM to form SAFRAN. Snecma is now a subsidiary of the SAFRAN Group and previous Snecma subsidiaries have been reorganised within the wider group. ... Fuel is any material that is capable of releasing energy when its chemical or physical structure is changed or converted. ... Pound may refer to Look up pound in Wiktionary, the free dictionary. ... Thrust is a reaction force described quantitatively by Newtons Second and Third Laws. ... A vertical line. ...

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Background and purpose

The Coléoptère was a VTOL or 'Vertical Take-Off and Landing' aircraft that was designed by SNECMA during the 1950s. While the Coléoptère was not the first VTOL aircraft, none of its predecessors had an annular wing designed to land vertically. The benefit of this annular wing was the requirement for very little landing or take-off space. However, the design of the Coléoptère met with many problems, such as overcoming the torque imparted to a vertical engine by its own turbine wheels and rotating compressor, and discovering and developing a method of balancing the craft on the column of air released from its jet pipe during the take-off and landing phase, as well as, more particularly, during manoeuvres out of the vertical positioning. To address some of these problems, as well as to provide a way to achieve vertical lift, SNECMA set to work on what was to become the first model of the Atar Volants. The Hawker Harrier, one of the famous examples of a plane with VTOL capability. ... This does not cite any references or sources. ... Annular, annulate, &c. ... A Laughing Gull with its wings extended in a gull wing profile Aircraft wing planform shapes: a swept wing KC-10 Extender (top) refuels a trapezoid-wing F/A-22 Raptor A wing is a surface used to produce lift and therefore flight, for travel in the air or another... Torque applied via an adjustable end wrench Relationship between force, torque, and momentum vectors in a rotating system In physics, torque (or often called a moment) can informally be thought of as rotational force or angular force which causes a change in rotational motion. ... Compressor has several meanings: A gas compressor is a mechanical device that takes in a gas and increases its pressure by squeezing a volume of it into a smaller volume. ...


Improvements, alterations and later models

There were at least four Atar Volant models constructed, each improving or making alterations on the last: the first (C.400 P.1), C.400 P.2, C.400 P.3. and the last, the C.450-01. The second in the series had much success at an international air display in Le Bourget, in Paris, and the third became a full-scale coleopter in its own right, due to numerous improvements and alterations made to the model. The C.450-01 model's maiden flight took place in May 1959. Two months later, while being put through its paces, the single prototype crashed. The pilot was seriously injured, and the prototype wrecked, resulting in the abandoning of its development and the project. Le Bourget is a commune of the Seine-Saint-Denis département in France. ... City flag City coat of arms Motto: Fluctuat nec mergitur (Latin: Tossed by the waves, she does not sink) Paris Eiffel tower as seen from the esplanade du Trocadéro. ... 1959 (MCMLIX) was a common year starting on Thursday of the Gregorian calendar. ... It has been suggested that this article or section be merged with prototyping. ... The name PILOT is an acronym, and stands for Programmed Instruction, Learning, Or Teaching. ...


Notes and references

  1. ^ Pound Conversion. Retrieved on 12 May 2007.
  • New Scientist:The Coleopter - a revolutionary experimental aircraft (5 February 1959)
  • French information source (French)
    • Above Source Translated into English (English)

May 12 is the 132nd day of the year (133rd in leap years) in the Gregorian calendar. ... 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...

See also

Icarus and Daedalus Humanitys desire to fly probably dates back to the first time prehistoric man observed birds. ... This is a list of planes capable of vertical take-off and landing arranged under manufacturer. ...

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