An automatic speed control for wind tunnels / by A.F. Zahm.

Format:

Book

Government document

Author/Creator:

Zahm, Albert Francis, 1862- author.

Contributor:

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

Series:

Technical note (United States. National Advisory Committee for Aeronautics) ; 278.

Technical notes / National Advisory Committee for Aeronautics ; No. 278

Language:

English

Subjects (All):

Wind tunnels.

Air flow.

Air speed--Automatic control.

Air speed.

Physical Description:

1 online resource (15 pages, 3 unnumbered pages) : illustrations.

Place of Publication:

Washington, [D.C.] : National Advisory Committee for Aeronautics, 1928.

Summary:

Since 1901 it has been good wind tunnel practice to generate the air flow by some type of suction fan or screw, and to determine the air speed by means of a pitot-static tube, or the tunnel wall pressure, or the rotational spped of the fan. Usually it is desirable to keep the air speed or preferably the impact pressure of the stream constant for some minutes consecutively, while taking observations. To maintain such constancy the fan can be held at a suitable speed either by hand control or by some automatic device.

The present article describes an automatic control that has been used in several forms, since 1921, in the wind tunnels at the Washington Navy Yard.

Notes:

Description based on online resource, PDF version; title from title page (TRAIL, viewed June 3, 2020).

"February 1928."

No Federal Depository Library Program (FDLP) item number.

Includes bibliographical references (page 15).

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

Other Format:

Print version: Zahm, Albert Francis, An automatic speed control for wind tunnels

OCLC:

1127388953