The "Kulbit" (also known as the "Frolov chakra") is an aerial maneuver developed by Russian pilots in which the aircraft performs an extremely tight loop, often not much wider than the length of the aircraft itself. It is an example of post-stall maneuvering, a type of supermaneuverability. Like most post-stall maneuvers, it demonstrates pitch control outside of the normal flight envelope wherein pitch control is made possible by having aerodynamic flow over the aircraft's elevators or stabilators. The name "Kulbit" is derived from the Russian Кульбит, meaning “somersault”. The alternate name, "Frolov's Chakra", refers to Russian test pilot Yevgeni Frolov, the pilot who first carried out the maneuver, while "chakra" is a yogic term, meaning “vortex” or “whirlpool”.
The Kulbit drastically decreases the aircraft's speed and could theoretically be used to cause a pursuing aircraft to overshoot its target. The maneuver is closely related to the famous "Pugachev's Cobra" maneuver, but the Kulbit completes the loop that the Cobra almost immediately cuts off.
Aircraft known to be able to execute the "Kulbit"
The following aircraft are currently known to be able to execute the "Kulbit":
- Sukhoi Su-35
- Sukhoi Su-37
- Sukhoi Su-30MKI/SM
- Su-47 Berkut
- PAK-FA
All have performed the Kulbit in airshow displays in the past.
- The SU-family aircraft execute the "Frolov chakra"
- A page containing a movie file of the Kulbit maneuver (listed as "Somersault, loop min radius")[dead link]
- Video showing the Su-30MKI Flanker showing off its Thrust Vectoring and doing a Cobra and a Kulbit[dead link]