Boeing/McDonnell Douglas YC-15A

The YC-15 was McDonnell Douglas' entrant into the U.S. Air Force's Advanced Medium STOL Transport (AMST) competition, to replace the C-130 Hercules as the USAF's standard STOL tactical transport. In the end neither the YC-15 nor Boeing YC-14 was ordered into production, although the YC-15's basic design would be used to form the successful McDonnell Douglas C-17 of the 1990s.