This Day in Aviation History
August 26th, 1975
First flight of the McDonnell Douglas YC-15.

The McDonnell Douglas YC-15 was a four-engine short take-off and landing (STOL) tactical transport. It was McDonnell Douglas’ entrant into the United States Air Force’s Advanced Medium STOL Transport (AMST) competition to replace the Lockheed C-130 Hercules as the USAF’s standard STOL tactical transport. In the end, neither the YC-15 nor the Boeing YC-14 was ordered into production, although the YC-15’s basic design would be used to form the successful C-17 Globemaster III…..

Wikipedia, McDonnell Douglas YC-15:

YouTube, McDonnell Douglas YC-15 STOL Tactical Transport:

YouTube, McDonnell-Douglas YC-15 Flight test:
Via Tom Dozier

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