Langley’s Propeller Research Tunnel

2 hours ago 1

A man stands inside the entrance of a tunnel, looking up at a small propeller plane. The tunnel, viewed from the side, is like a cylinder with sides curving inward. The photo is in black and white.

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.

Image Credit: NASA

Read More

Read Entire Article