NACA Mach Number Indicator for Use in High-Speed Tunnels
Abstract:
Principles of operation of the NACA Mach number indicator are explained, which measures ratio of indicated dynamic pressure to static pressure. The unit performs with efficient accuracy in the NACA 8-foot high-speed tunnel. General design considerations are discussed, and the indicator may also be used to determine local Mach numbers on aerodynamic bodies, and be adapted as a flight Mach number indicator enabling the pilot to read directly his proximity to limiting conditions.
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Collection: TR