About
John W. 'Jack Boyd holds a plaque presented to Harvey Allen in recognition of his outstanding solution of the reentry heating problem which has been indispensable to the design of the Mercury, Gemini, and Apollo spacecraft (Manned Spacecraft Center, November 14, 1968) Plaque contains samples of tested materials and models of spacecraft. — NASA ARC · 2009. ABD devlet eseri: kamu mali, ticari islerde de serbestce kullanilabilir.
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