Skip Top nav bar link group topnav end piece go to business section go to education section go to history section go to gallery section go to news section go to organizations section go to research section go to search engine go to site index topnav end piece
NASA Meatball NASA Dryden F-18 High Alpha Research Vehicle (HARV) banner
F-18 HARV on ramp close-up of actuated nose strakes F-18 HARV on ramp close-up of actuated nose strakes

Photo Number: EC95-43057-8
Photo Date: March 24, 1995

Formats: 480x611 JPEG Image (87 KBytes)
1005x1280 JPEG Image (463 KBytes)
2400x3055 JPEG Image (4,564 KBytes)

Description: Outlined with gold stripes are the hinged nose strakes, modifications made to NASA's F-18 HARV (High Alpha Research Vehicle) at the Dryden Flight Research Center, Edwards, California.

Actuated Nose Strakes for Enhanced Rolling (ANSER) were installed to fly the third and final phase in the HARV flight test project. 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.

Early wind tunnel tests indicated that the strakes would be as effective in yaw control at high angles of attack as rudders are at lower angles. 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; High Alpha Reseach Vehicle; strakes; nose strakes; ANSER; Actuated Nose Strakes for Enhanced Rolling

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

NASA Website Privacy Statement