The Resistance of Spheres in Wind Tunnels and In Air (1924)
NASA Technical Reports Server (NTRS) · leaf 12
11 THE RESISTANCE OF SPHERES IN WIND TUNNELS AND IN AIR. became necessary when it was found that the ring honeycomb, 2 by 6 inches (5 by 15 centimeters) tubes, was insufficient to counteract the torque of the propeller. The result was Fig. 11.—Variable density No. 2 wind tunnel. naturally a coarse… … Fio. 12.—Resistance ot sphere in variable density tunnel. Only the 20-centimeter (7.874 inches) sphere was tested in the variable density tunnel. A heavy steel bar was made fast to the main balance ring so that it was coincident with the hon-
NASA Technical Reports Server (NTRS)
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