Tandem air propellers / by E.P. Lesley.

Format:

Book

Government document

Author/Creator:

Lesley, E. P. (Everett Parker), 1874-1945, author.

Contributor:

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

Series:

Technical note (United States. National Advisory Committee for Aeronautics) ; 689.

Technical note / National Advisory Committee for Aeronautics ; No. 689

Language:

English

Subjects (All):

Propellers, Aerial.

Propellers, Aerial--Testing.

Propellers--Design and construction.

Propellers.

Physical Description:

1 online resource (10 pages, 16 unnumbered pages) : illustrations.

Place of Publication:

Washington, [D.C.] : National Advisory Committee for Aeronautics, 1939.

Summary:

Tests of 2-blade, adjustable-pitch, counterrotating tandem model propellers, adjusted to absorb equal power at maximum efficiency, were made at Stanford University.

The tests showed that the efficiency of the tandem propellers was from 0.5 to 4 percent greater than that of a 4-blade propeller and, at the high blade-angle settings, not appreciably inferior to that of a 2-blade propeller.

Notes:

Description based on online resource, PDF version; title from title page (TRAIL, viewed October 25, 2021).

"February 1939."

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: Lesley, E. P. (Everett Parker), 1874-1945. Tandem air propellers.

OCLC:

1154792856