Cobra maneuver: Difference between revisions
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[[file:Su-27 Cobra 2b.png|thumb|800px|A Su-27 performing the Cobra manoevre]] |
[[file:Su-27 Cobra 2b.png|thumb|800px|A Su-27 performing the Cobra manoevre]] |
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'''Pugachev's Cobra''' (or the '''Pugachev Cobra''') is an example of [[supermanoevreability]] in [[air combat manoevreing]] (ACM), specifically [[post-stall|poststall manoevreing]]. It is a demonstration of the [[pitch (flight)|pitch]] control authority, high [[angle of attack]] (AOA) stability and engine/inlet compatibility at high angles of attack of the aircraft. The manoevre allows for very quick turns which can make an attack fail, or put the pilot in a position to execute an attack. The Pugachev's Cobra is considered to be one of the most dramatic and demanding manoevres performed at air shows worldwide. The manoevre is named after the [[Sukhoi|Sukhoi OKB]] (design bureau) [[Soviet]] test pilot [[Viktor Pugachyov|Viktor Pugachev]], who first performed the manoevre officially in 1989 at the [[Paris]] [[Le Bourget]] [[air show]].<ref>[http://books.google.ae/books?id=p40nOZgeh84C&pg=PA442&dq=Viktor+Pugachev+Cobra&hl=en&ei=Do7vS8OODtK8rAfFocGTBw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCUQ6AEwAA#v=onepage&q=Viktor%20Pugachev%20Cobra&f=false The Illustrated Directory of Fighters] By Mike Spick</ref> |
'''Pugachev's Cobra''' (or the '''Pugachev Cobra''') is an example of [[supermanoevreability]] in [[air combat manoevreing]] (ACM), specifically [[post-stall|poststall manoevreing]]. It is a demonstration of the [[pitch (flight)|pitch]] control authority, high [[angle of attack]] (AOA) stability and engine/inlet compatibility at high angles of attack of the aircraft. The manoevre allows for very quick turns which can make an attack fail, or put the pilot in a position to execute an attack. The Pugachev's Cobra is considered to be one of the most dramatic and demanding manoevres performed at air shows worldwide. The manoevre is named after the [[Sukhoi|Sukhoi OKB]] (design bureau) [[Soviet]] test pilot [[Viktor Pugachyov|Viktor Pugachev]], who first performed the manoevre officially on public in 1989 at the [[Paris]] [[Le Bourget]] [[air show]].<ref>[http://books.google.ae/books?id=p40nOZgeh84C&pg=PA442&dq=Viktor+Pugachev+Cobra&hl=en&ei=Do7vS8OODtK8rAfFocGTBw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCUQ6AEwAA#v=onepage&q=Viktor%20Pugachev%20Cobra&f=false The Illustrated Directory of Fighters] By Mike Spick</ref> |
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Initially Cobra was performed by Sukhoi's test pilot Igor Volk while testing new Su-27.<ref name=buran>[http://www.buran.ru/htm/str56.htm Из космоса — на самолёт!]</ref> |
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== Description == |
== Description == |
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Revision as of 10:16, 8 March 2011
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 | This article needs additional citations for verification. (November 2010) |
Pugachev's Cobra (or the Pugachev Cobra) is an example of supermanoevreability in air combat manoevreing (ACM), specifically poststall manoevreing. It is a demonstration of the pitch control authority, high angle of attack (AOA) stability and engine/inlet compatibility at high angles of attack of the aircraft. The manoevre allows for very quick turns which can make an attack fail, or put the pilot in a position to execute an attack. The Pugachev's Cobra is considered to be one of the most dramatic and demanding manoevres performed at air shows worldwide. The manoevre is named after the Sukhoi OKB (design bureau) Soviet test pilot Viktor Pugachev, who first performed the manoevre officially on public in 1989 at the Paris Le Bourget air show.[1] Initially Cobra was performed by Sukhoi's test pilot Igor Volk while testing new Su-27.[2]
Description
Initially the pilot has to disengage the angle of attack limiter of the plane. This action also disengages the g limiter. After that the pilot must pull back on the stick hard. The aircraft reaches 90–120° angle of attack with a slight gain of altitude and a significant loss of speed. When the elevator is centered, the drag at the rear of the plane causes torque, thus making the aircraft pitch forward. At that time the pilot must add power to compensate for the lift loss. In a properly performed Pugachev's Cobra, the plane maintains almost straight flight throughout the manoeuvre; the plane does not roll or yaw in either direction. Proper entry speed is significant because, if entering at too low a speed, the pilot might not be able to accomplish the manoeuvre; entering at too high a speed might result in the g-force sufficient[clarification needed] for to the airframe to be damaged, or for the pilot to lose consciousness.[3][verification needed]
The Herbst manoeuvre and the Helicopter manoeuvre are other examples of the recent growing use of vectored thrust in manned and unmanned 4.5 and 5th generation aircraft.[4]
Aircraft known to be capable of the manoevre
- Sukhoi Su-27 and variants (Su-30/Su-30MKI to Su-37)
- Mikoyan MiG-35
- F-22 Raptor
- F-16 MATV/VISTA
- F/A-18 HARV
- Boeing F/A-18E/F Super Hornet
- Saab J-35
See also
References
- ^ The Illustrated Directory of Fighters By Mike Spick
- ^ Из космоса — на самолёт!
- ^ What is cobra?, AeroWeb.Lucia.it
- ^ Benjamin Gal-Or, "Vectored Propulsion, Supermanoeuvreability, and Robot Aircraft", Springer Verlag, 1990, ISBN 0-387-97161-0, 3-540-97161-0
External links
- Interview with Pugachev about this manoevre
- Fighter Technology of the Future
- USAF & NATO Report RTO-TR-015 AC/323/(HFM-015)/TP-1 (2001).
