Joint Report on Standardization Tests on N.P.L. R.A.F 15 Airfoil Model (1930)
NASA Technical Reports Server (NTRS) · leaf 13
12 BEPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS most of the discrepancies are ironed out when the wall effect correction is applied, as shown in Figure 13. The two outstanding differences from mean values are the high maximum lift obtained in the McCook Field tests and the low minimum drag… … 32 .32 .28 .24 0 20 .20 20 J6 .16 40% J2 60 ^ .12 K CD' .08 .08 80 ,04 .04 100 0 16° 20c -4° of of Figure 15 Figure 14 The third group consists of only two tests, one at 98.4 ft. per sec, the other at 100 ft. per sec. In this group the polar plots (figs. 16 and 17) show close agreement, but the…
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