Preliminary wing model tests in the variable density wind tunnel of the National Advisory Committee for Aeronautics (1926)
NASA Technical Reports Server (NTRS) · leaf 14
stant for all angles of attack and values of lift. When plotted against the lift, the curve will be a straight line parallel to the lift axis. M-Lxl- *™489„X^ 57.3 1+^ 4 where: M=moment about 25 per cent of chord Z=lift l- ■ lever arm = —~r 4 c = chord = 12.7 cm a*=effective angle of attack=6.216°… … a o.o -o.i -as -03 -0.4 -as , Q,(obouf quarter chord) Fio. 23.—Test 80-7. Tank pressure 15.8 atmospheres. Dynamic pressure j=5S0 kg/m». Reynolds Number 2,910,000. AirtbO with two skids The computed and the observed values of moment coefficient are shown in the chart of observed values for the N. A.…
NASA Technical Reports Server (NTRS)
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