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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.

Langley’s Propeller Research Tunnel

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

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TakenSeptember 9, 1926
Image CreditNASA
Size1536x1086px