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searching for Propeller Research Tunnel 2 found (5 total)

alternate case: propeller Research Tunnel

Bristol Type 92 (800 words) [view diff] exact match in snippet view article find links to article

tests on closely cowled engines in the 20 ft (6.1 m) diameter Propeller Research Tunnel (PRT). The PRT's ability to test full scale cowlings meant that

Aerospace (3,528 words) [view diff] exact match in snippet view article find links to article

invented in Germany and later used on the Boeing 707. The 1927 large Propeller Research Tunnel at NACA Langley confirmed that the landing gear was a major source