Sukhoi’s Su-37 Terminator Fighter Could Hit Mach 2.5 and Flip a Full 360 Degrees in a Tiny Patch of Sky. Only 1 Was Built and No Buyer Ever Paid to Put It Into Production.

Sukhoi’s Su-37 Terminator Fighter Could Hit Mach 2.5 and Flip a Full 360 Degrees in a Tiny Patch of Sky. Only 1 Was Built and No Buyer Ever Paid to Put It Into Production.

The Su-37 began as T10M-11, the 11th of Sukhoi's Su-27M prototypes. Sukhoi fitted it with Lyulka-Saturn AL-37FU turbofans whose nozzles swiveled about 15 degrees up or down, so the engines could steer the jet at extreme angles of attack and low speeds, when normal control surfaces lose their bite. A digital fly-by-wire system tied engines and controls together. At the 1996 Farnborough International Airshow, it flew a more dangerous version of Pu…