- SNECMA Atar Volant
The original Atar Volant or C.400 P1 was a
turbojet engine produced bySNECMA (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 holdfuel and remote-control equipment, the unit weighed 5,600 pounds (2550 kg) [cite web|url=http://users.tpg.com.au/doktormj/kilograms2pounds.htm|title=Pound Conversion|accessdaymonth=12 May|accessyear=2007 ] and generated athrust of approximately 6,200pounds-force (27.6 kN); the Atar Volant was able to causevertical 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.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 anannular 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 thetorque imparted to a vertical engine by its ownturbine wheel s and rotatingcompressor , and discovering and developing a method of balancing the craft on the column of air released from itsjet 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.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 , inParis , 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 singleprototype crashed. The pilot was seriously injured, and the prototype wrecked, resulting in the abandoning of its development and the project.Notes and references
;Specific;General
* [http://www.newscientist.com/article/mg19225780.013-the-coleopter--a-revolutionary-experimental-aircraft.html New Scientist:The Coleopter - a revolutionary experimental aircraft (5 February 1959)]
* [http://modelbox.free.fr/photoscopes/Coleo_Phot/index.html French information source] fr icon
** [http://translate.google.com/translate?hl=en&sl=fr&u=http://modelbox.free.fr/photoscopes/Coleo_Phot/index.html&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3DAtar%2BVolant%26hl%3Den Above Source Translated into English]See also
*
History of Aviation
*List of VTOL aircraft External links
* [http://luftfahrtmuseum.com/htmi/itf/atvol.htm Virtual Aviation Museum]
Wikimedia Foundation. 2010.