Sperry M-1 Messenger: The Army's Sperry M-1 Messenger tested variable-camber wings at Langley in 1926. NASA Identifier: L1313
Sperry M-1 Messenger: The Sperry M-1 Messenger mounted for testing in the Propeller Research Tunnel, 1927. NASA Identifier: L2067
A Langley researcher ponders the future, in mid-1927, of the Sperry M-1 Messenger, the first full-scale airplane tested in the Propeller Research Tunnel. Contents page photograph published in Winds of Change, 7 More
Description (1927) A Langley researcher ponders the future, in mid-1927, 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. More