Modern Drawings/Air/Russia/Fighters/Su-27_Su-37/SU-27UB-Prototypes.htm | Update: -



Ffirst Su-27UB prototype.

 




Second Su-27UB prototype. It was used for inflight refueling system tests.
Record flight to route: Moscow-Kmsomolsk-na-Amure-Moscow in 1987.

 

 

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