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NASA Meatball NASA Dryden F-18 High Alpha Research Vehicle (HARV) banner
F-18 HARV in flight F-18 HARV in flight
Photo Number: EC91-495-15
Photo Date: September 13, 1991
Formats: 558x480 JPEG Image (86 KBytes)
1191x1024 JPEG Image (609 KBytes)
2000x1720 JPEG Image (730 KBytes)
Description: The modified F-18 flown by NASA's Dryden Flight Research Center, Edwards, California, for high angle of attack research cruises over the nearby desert. A thrust vectoring system, linked to the aircraft's flight control system, was installed on each of the engine exhaust nozzles. The system moves a set of three paddles on each engine to redirect thrust for directional control and increased maneuverability at angles of attack at up to 70 degrees.

Data from the F-18 high angle of attack program produced information to validate computer codes and wind tunnel results and led to design methods providing better performance in future aircraft.
Keywords: F-18 High Alpha Research Vehicle; HARV; thrust vectoring
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