"FS2000 NASA Prototype B737-X"
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This is NASA and USAF prototype supersonic Boeing 737-X.it designed for shuttle pilots training.this plane can reach mach 2.It has two 30000 lbs engines with 35% power on reverse thrust.Full fuel weight is 11000 Kg but the capacity is 3X7570000 liters!.Same as standard Boeing 737 in lower speeds.Very stable at heigh speed.The .air file can use with default boeing 737-400.
