Tests of a gust-alleviating flap in the gust tunnel / by Philip Donely and C.C. Shufflebarger.

Format:

Book

Government document

Author/Creator:

Donely, Philip, author.

Shufflebarger, C. C., author.

Contributor:

United States. National Advisory Committee for Aeronautics, issuing body.

Series:

Technical note (United States. National Advisory Committee for Aeronautics) ; 745.

Technical note / National Advisory Committee for Aeronautics ; No. 745

Language:

English

Subjects (All):

Flaps (Airplanes)--Testing.

Flaps (Airplanes).

Wind tunnel testing.

Stability of airplanes.

Physical Description:

1 online resource (11 pages, 13 unnumbered pages) : illustrations.

Place of Publication:

Washington, [D.C.] : National Advisory Committee for Aeronautics, 1940.

Summary:

Tests were made in the N.A.C.A. gust tunnel to determine the effectiveness of long-period dynamically over-balanced flap in reducing airplane accelerations due to atmospheric gusts. For two gust shapes, one gust velocity, one forward velocity, and one wing loading, a series of flights was made with the flap locked and was then repeated with the flap free to operate. The records obtained were evaluated by routine methods.

The results indicate that the flap reduced the maximum acceleration increment 39 percent for a severe gust with a representative gust gradient distance of 8 chord lengths and that, for an extreme gust shape (a sharp-edge gust), the reduction was only 3 percent. The results also indicate that the flap tended to reduce the longitudinal stability of the airplane. Computations made in the effectiveness and the action of the flap were in good agreement with the experimental results.

Notes:

Description based on online resource, title from title screen (viewed May 29, 2020).

"January 1940."

"Langley Memorial Aeronautical Laboratory."

No Federal Depository Library Program (FDLP) item number.

Includes bibliographical references (page 10).

Electronic reproduction. Denton, Texas : University of North Texas, 2011. Electronic reproduction from print master produced by University of North Texas.

Other Format:

Print version: Donely, Philip Tests of a gust-alleviated flap in the gust tunnel

OCLC:

1156324011