Purpose of test was to compare six well-known airfoils, the R.A.F. 15, U.S.A. 5, U.S.A. 27, U.S.A. 35-B, Clark Y, and Go ttingen 387, fitted to Sperry Messenger model, at full-scale Reynolds number as obtained in variable-density wind tunnel of Nat. Advisory Comm. for Aeronautics; and to determine scale effect on model equipped with all details of actual airplane; results show large decrease in minimum drag coefficient upon increasing Reynolds number from one-twentieth to full scale; maximum lift coefficient was increased with increasing scale for all airfoils except Go ttingen 387, for which it was slightly decreased; comparison is made between results of these tests and those obtained from tests made in this tunnel on airfoils alone.
Air force tests of Sperry messenger model with six sets of wings
Nat. Advisory Comm. Aeronautics -- Tech. Notes
1927
20 pages
20 Figs.
Report
English
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Air force tests of Sperry Messenger model with six sets of wings
TIBKAT | 1928
|The sperry "messenger" biplane
Engineering Index Backfile | 1921
|Engineering Index Backfile | 1920