Flight measurements of buffet characteristics of the F-104 airplane for selected wing-flap deflections / by Edward L. Friend and Walter J. Sefic.

Format:

Book

Government document

Author/Creator:

Friend, Edward L., author.

Sefic, Walter J., author.

Contributor:

United States. National Aeronautics and Space Administration, issuing body.

Flight Research Center (U.S.)

Series:

NASA technical note ; D-6943.

NASA/TN ; D-6943

Language:

English

Subjects (All):

Buffeting (Aerodynamics).

Flaps (Airplanes).

Airplanes--Handling characteristics.

Airplanes.

Starfighter (Fighter plane).

Physical Description:

1 online resource (47 pages) : illustrations.

Place of Publication:

Washington, D.C. : National Aeronautics and Space Administration, August 1972.

Summary:

A flight program was conducted on the F-104 airplane to investigate the effects of moderate deflections of wing leading- and trailing-edge flaps on the buffet characteristics at subsonic and transonic Mach numbers. Selected deflections of the wing leading and trailing-edge flaps, individually and in combination, were used to assess buffet onset, intensity, and frequency; lift curves; and wing-rock characteristics for each configuration. Increased deflection of the trailing-edge flap delayed the buffet onset and buffet intensity rise to a significantly higher airplane normal-force coefficient. Deflection of the leading-edge flap produced some delay in buffet onset and the resulting intensity rise at low subsonic speeds. Increased deflection of the trailing-edge flap provided appreciable lift increments in the angle-of-attack range covered, whereas the leading-edge flap provided lift increments only at high angles-of-attack. The pilots appreciated the increased maneuvering envelope provided by the flaps because of the improved turn capability.

Notes:

"August 1972."

Includes bibliographical references (pages 12-13).

Description based on online resource, PDF version; title from title page (NASA, viewed on June 21, 2021).

OCLC:

22369131