A Bell YP-39 Airacobra flown by NACA from 1941 to 1944. (NASA/Langley Research Center Photograph.)
(NASA/Langley Research Center Photograph.)

Bell YP-39 Airacobra at NACA

A Bell YP-39 Airacobra flown by NACA from 1941 to 1944. (NASA/Langley Research Center Photograph.)

A Bell YP-39 Airacobra flown by NACA from 1941 to 1944. (NASA/Langley Research Center Photograph.)
(NASA/Langley Research Center Photograph.)

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