Tests of a contra-propeller for aircraft / by William M. Benson.

Format:

Book

Government document

Author/Creator:

Benson, William M., author.

Contributor:

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

Series:

Technical note (United States. National Advisory Committee for Aeronautics) ; 677.

Technical note / National Advisory Committee for Aeronautics ; No. 677

Language:

English

Subjects (All):

Propellers, Aerial--Testing.

Propellers, Aerial.

Physical Description:

1 online resource (13 pages, 9 unnumbered pages) : illustrations.

Place of Publication:

Washington, [D.C.] : National Advisory Committee for Aeronautics, 1938.

Summary:

Tests of an 8-blade contra-propeller of 32-inch diameter in combination with a 4-blade, 36-inch diameter, adjustable pitch, metal propeller at pitch settings of 15 degrees, 25 degrees, 35 degrees, and 45 degrees at 0.75 R were made in the wind tunnel at Stanford University.

The tests showed a significant increase in effective thrust of the combination over that of the propeller along for values of V/nD somewhat below those for maximum efficiency and without a corresponding increase of power absorbed. From 1/2 percent to 2-1/2 percent in propulsive efficiency was thus gained in this range. In all but one case, however, the peak propulsive efficiency of the combination was found to be from 1 to 2 percent less than that of the propeller alone.

Notes:

Title from title screen (viewed May 12, 2020).

"November 1938."

"Stanford University."

No Federal Depository Library Program (FDLP) item number.

Includes bibliographical references (page 11).

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

Other Format:

Print version: Benson, William M. Tests of a contra-propeller for aircraft

OCLC:

1154320735