Title

F-105F Transonic Buffet Study and Effect of Maneuvering Flaps

Date

1969

Index Abstract

Coming Soon

Photo Quality

Complete

Report Number

AFFDL TR 69-37

Creator

Margolin, Milton

Chung, Jung G.

Corporate Author

Fairchild Hiller Corporation

Extent

232

NTRL Accession Number

AD693650

Identifier

AD0693650

Access Rights

Notice(s)

Distribution Classification

1

Contract

F33657-68-C-1057

DoD Project

None Given

DoD Task

None Given

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Special Scanning Requirements

fold out pages

Abstract

A flight test investigation was made using a Republic F-105F aircraft to obtain data related to high subsonic-transonic buffet and the effects of utilizing a maneuvering flap. Flight tests were made at nominal altitudes of 25,000 feet and 35,00 feet. At each altitude, data was collected at three Mach numbers from level flight to maximum usable lift. A related investigation was made using a 1/22-scale model of the F-105F aircraft in the NASA Langley High-Speed Wind Tunnel. The wind tunnel tests were made at three Mach numbers (0.80, 0.85 and 0.90) and data was obtained from zero angle-of-attack to the strain gage balance limits. Flight test results compare readily to wind tunnel data. The boundary layer profiles between flight test and wind tunnel are quite similar. The angles of attack at buffet onset are also comparable. Selection of the leading edge flap and trailing edge flap deflection may be made on the basis of the greatest normal force coefficient at buffet onset, but the final criterion will be level of buffet intensity apparent to the pilot. This level may be varied with the leading edge flap deflection.

Report Availability

Full text available

Date Issued

1969-07

Laboratory

Air Force Flight Dynamics Laboratory

Provenance

AFRL/VACA

Type

report

Format

1 online resource