when Soviet test pilot Viktor Pugachev performed it at the Le Bourget Paris air show in 1989 using a Sukhoi Su-27. The tactic was previously unknown to the public and it was quickly named after Pugachev. Derivatives of the cobra There are several derivatives of the cobra which all initiate it similarly, but end differently. Cobra climb In the cobra climb, the aircraft initiates the cobra, but instead of remaining in altitude and continuing forward, it starts to stall climb (climbing vertically). The maneuver is similar to a regular stall climb except that the change from level flight to stall climb happens much faster. However, unlike a regular climb, this still achieves the effect of the cobra and the aircraft will still stall momentarily which lowers speed and momentum. The maneuver ends with the climb and the aircraft can return to common flight in various ways. Cobra stall In the cobra stall, the aircraft initiates the cobra, but instead of returning to level flight, the aircraft instead fully stalls out after which it applies thrust and rudder to change the direction of the aircraft. Cobra barrel roll In the cobra roll, the aircraft initiates the cobra but instead of returning to level flight, the aircraft uses its ailerons and rudder to initiate a barrel roll at the peak of the initial nose climb which ends the maneuver with a barrel roll. Cobra hover The cobra hover is an extension of the original maneuver in which an aircraft initiates the cobra but remains in the "cobra state" for a longer period of time by the use of thrust control, thus achieving the "hover" part of the maneuver. After which the aircraft can complete the maneuver in various ways depending on its energy. Cobra turn The cobra turn is an air combat maneuver. It is a variation on the cobra maneuver where the aircraft performs the pull-up, but instead of returning to level flight applies rudder or thrust vectoring and turns downward. The aircraft achieves a negative angle of attack, ending the maneuver in a dive, therefore regaining airspeed sooner than the common cobra. John Turner of BAE considers the cobra maneuver to have little use in air combat maneuvering. It could also be argued that the combat effect is likely to be similar to the “Vectoring In Forward Flight" or VIFFing maneuver. In theory, VIFFing allows the aircraft to effectively slow