A Boeing B-29 Superfortress used by NACA for engine cooling research in June 1944.
(NASA Photograph.)

NACA B-29 Superfortress

A Boeing B-29 Superfortress used by NACA for engine cooling research in June 1944. (NASA Photograph.)

A Boeing B-29 Superfortress used by NACA for engine cooling research in June 1944.
(NASA Photograph.)

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