Tank tests to determine the effects of the chine flare of a flying-boat hull : N.A.C.A. model series 62 and 69 / by Joe W. Bell and Roland E. Olson.

Format:

Book

Government document

Author/Creator:

Bell, Joe W., author.

Olson, Roland E., author.

Contributor:

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

Series:

Technical note (United States. National Advisory Committee for Aeronautics) ; 725.

Technical note / National Advisory Committee for Aeronautics ; No. 725

Language:

English

Subjects (All):

Seaplanes--Hulls.

Seaplanes.

Seaplanes--Models--Testing.

Physical Description:

1 online resource (15 pages, 23 unnumbered pages) : illustrations.

Place of Publication:

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

Summary:

Twenty-two models of flying-boat hulls were tested in the N.A.C.A. tank for the purpose of determining the effects of water resistance and spray of 13 variations in the transverse section of the bottom of the forebody and of three variations in the form of the afterbody. The forebodies were of the same over-all dimensions and differed in the type and amount of chine flare. The afterbodies included one with a pointed plan form and straight buttocks, one with a second step and concave buttocks. The depth of the step at the keel was the same in all models.

In general, the effect of chine flare on the resistance was small although, at speeds just above the hump, the resistance of forms with chine flare was generally less than the resistance of the form without chine flare. The chine flare reduced the height of the forward part of the spray where the spray leaves the chine of the model above the water level but had little effect on the spray where the chine of the model was below the water level. In cases of extreme flare, the spray forming just ahead of the step seemed to be higher.

Notes:

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

"August 1939."

"Langley Memorial Aeronautical Laboratory."

No Federal Depository Library Program (FDLP) item number.

Includes bibliographical references (page 14).

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

Other Format:

Print version: Bell, Joe W. Tank tests to determine the effects of the chine flare of a flying-boat hull, N.A.C.A. model series 62 and 69

OCLC:

1156323733