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[Inside of the whirl test machine]

Description: Photograph of the inside of the whirl test machine during the whirl testing of the XH-40 helicopter.
Date: July 3, 1956
Partner: UNT Libraries Special Collections

[Part of the whirl test machinery]

Description: Photograph of a portion of the machinery used in whirl testing the XH-40.
Date: July 3, 1956
Partner: UNT Libraries Special Collections

[XH-40 cabin roof and fixture]

Description: Photograph of the cabin roof and fixture of the XH-40 on the assembly line.
Date: July 3, 1956
Partner: UNT Libraries Special Collections
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