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National advisory committee for aeronautics: Report No. 669, Airfoil Section Data Obtained in the N. A. C. A. VariableDensity Tunnel as Affected by Support Interference and Other Corrections, by Eastman N. Jacobs and Ira H. Abbott.32 pages, illustrations, tables, 23 × 29 CMS. Washington, Government Printing Office, 1939. Price to cents

Publisher
Elsevier Science
Year
1940
Tongue
English
Weight
61 KB
Volume
229
Category
Article
ISSN
0016-0032

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✦ Synopsis

Factors derived from wing theory are presented. By means of these factors, the angle of zero lift, the lift-curve slope, the pitching moment, the aerodynamiccenter position, and the induced drag of tapered wings with partial-span flaps may be calculated. The factors are given for wings of aspect ratios 6 and IO, of taper ratios from o.25 to I.OO, and with flaps of various lengths.

An example is presented of the method of application of the factors. Fair agreement with experimental results is shown for two wings of different taper ratio having plain flaps of various spans.

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National advisory committee for aeronaut
National advisory committee for aeronautics: Report No. 416, The N. A. C. A. variable-density wind tunnel: by Eastman N. Jacobs and Ira H. Abbott, 12 pages, illustrations, 23 × 29 cms. Washington, Superintendent of Documents, 1932. Price five cents
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