Turbulence Factors of NACA Wind Tunnels as Determined by Sphere Tests (1937)
NASA Technical Reports Server (NTRS) · leaf 6
TURBULENCE FACTORS OF N. A. C. A. WIND TUNNELS AS DETERMINED BY SPHERE TESTS … Figure 2a.—An 8-inch sphere mounted on the drag balance. To pressure (0 Static tube Test sphere Emery knife edges Pressure capsule and rubber diaphragm Figure 2b.—Sketch of the sphere drag balance.
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