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NASA Meatball NASA Dryden F-18 High Alpha Research Vehicle (HARV) banner
F-18 HARV in flight with actuated nose strakes F-18 HARV in flight with actuated nose strakes

Photo Number: EC95-43249-02
Photo Date: Aug 1995

Formats: 591x480 JPEG Image (106 KBytes)
1260x1024 JPEG Image (664 KBytes)

Description: NASA's F-18 from the Dryden Flight Research Center, Edwards, California, soars over the Mojave Desert while flying the third and final phase of the HARV (High Alpha Research Vehicle) program. A set of control surfaces called strakes were installed in the nose of the aircraft.

The strakes, outlined in gold and white, provided improved yaw control at steep angles of attack. Normally folded flush, the units -- four feet long and six inches wide -- can be opened independently to interact with the nose vortices to produce large side forces for control. Testing involved evaluation of the strakes by themselves as well as combined with the aircraft's Thrust Vectoring System. The strakes were designed by NASA's Langley Research Center, then installed and flight tested at Dryden.

Keywords: F-18 High Alpha Research Vehicle; HARV; strakes; nose strakes; Langley; steep; AOA; thrust vectoring system; ANSER

Last Modified: February 6, 2002
Responsible NASA Official: Marty Curry
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