Public domain
Production. Airplane engines. An airplane engine under special test in a secluded and carefully guarded woodland area near a Midwest engine plant. If the engine meets the exacting requirement imposed by the test engineers, it will yield valuable technical data that will influence the construction of
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Credit lineProduction. Airplane engines. An airplane engine under special test in a secluded and carefully guarded woodland area near a Midwest engine plant. If the engine meets the exacting requirement imposed . 1942-01-01. Palmer, Alfred T., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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