Technical Report Archive & Image Library (TRAIL) - 2 Matching Results

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Effect of variation of chord and span of ailerons on rolling and yawing moments in level flight

This report presents the results of an investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wing sections. Some attention is devoted to a study of the effect of scale on rolling and yawing moments and to the effect of slightly rounding the wing tips. The results apply to level flight with the wing chord set at an angle of attack of +4 degrees and to conditions of zero pitch, zero yaw, and zero roll of the … more

Date: July 10, 1928

Creator: Heald, R. H. & Strother, D. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Full-scale wind-tunnel tests of a propeller with the diameter changed by cutting off the blade tips

Tests were conducted in order to determine how the characteristics of a propeller are affected by cutting off the tips. The diameter of a standard 10-foot metal propeller was changed successively to 9 feet 6 inches, 9 feet 0 inches, 8 feet 6 inches, and 8 feet 0 inches. Each propeller thus formed was tested at four pitch settings using an open cockpit fuselage and a D-12 engine. A small loss in propulsive efficiency is indicated. Examples are given showing the application of the results to prac… more

Date: December 10, 1929

Creator: Wood, Donald H.