![Sperry M-1 Messenger, the first full-scale airplane tested in the Propeller Research Tunnel.](https://www.nasa.gov/wp-content/uploads/2023/03/431384main_naca_sperrym1_full.jpg)
The NACA: A Look Back
In mid-1927, a Langley Laboratory researcher ponders the future of the Sperry M-1 Messenger, the first full-scale airplane tested in the Propeller Research Tunnel. Standing in the exit cone is Elton W. Miller, Max M. Munk's successor as chief of aerodynamics.
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https://www.nasa.gov/image-detail/naca-look-back-18/
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