TRECOM technical reports. 63-77. [Experimental research] CH-21A helicopter airframe deformation under dynamic crash condition, one of series of reports pertaining to dynamic crash test of Army CH-21A helicopter [with bibliography; prepared by [William H. Reed and Donald F. Carroll] Aviation Safety Engineering and Research, 2871 Sky Harbor Blvd., Phoenix, Ariz., Division (Task 1A024701A12101, contract DA 44-177-AMC-888(T); technical of Flight Safety Foundation, Inc.

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