Public domain
Production. Pratt and Whitney airplane engines. Engineers working at the control panel of a test stand at a large Eastern plant study the performance of a new Pratt and Whitney airplane motor. Each engine must meet rigid Air Force requirements before it is shipped to one of our huge aircraft factori
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProduction. Pratt and Whitney airplane engines. Engineers working at the control panel of a test stand at a large Eastern plant study the performance of a new Pratt and Whitney airplane motor. Each en. 1942-01-01. United States. Office Of War Information, Feininger, Andreas. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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