Langley’s Propeller Research Tunnel

#NASA #ImageOfTheDay Chief of aerodynamics Elton W. Miller ponders the future of the Sperry M-1 Messenger, the first full-scale airplane tested in the Propeller Research Tunnel. Miller was one of the designers of the Propeller Research Tunnel.

https://www.nasa.gov/image-detail/7605912294-f4e0b4eb2f-o/