An Investigation of the Aerodynamic Characteristics of an Airplane Equipped with Several Different Sets of Wings (1929)
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10 REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS 4" (9" la" 40 S" 12" 0" Angle of attache, a Anale of attack, a Fig. 12.—Sperry Messenger tests. Characteristics of Gottingen 387 Fig. 13.—Sperry Messenger tests. Lift vs. angle of attack. Glide at wings. Glide at—^=1,075. (Limited data) —^… … "^0° 4" 8" 12" 16" 16° 4° 6" 12" Angle of attack, a Angle of attack, a Fig. 15.—Sperry Messenger tests. L/D vs. angle of attack. Glide at Fig. 14.—Sperry Messenger tests. Drag vs. angle of attack. Glide at V V =1.075 = 1.075 nD nD
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