McDonnell Douglas YC-15
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Yc15-1_072.jpg
The YC-15 was McDonnell-Douglas' entry into the USAF's Advanced Medium STOL Transport (AMST) competition, to replace the C-130 Hercules as the USAF's standard STOL tactical transport. The AMST project introduced a number of innovative features, such as under-surface blowing, which used double-slotted flaps to direct part of the jet exhaust downwards, while the rest of the exhaust passed through and downward over the flaps, introducing the Coanda effect.
The YC-15, as well as Boeing's entry into the competition, the YC-14, met or exceeded the specifications of the contest. However, the project was cancelled before either product could be chosen. The YC-15 would see a new life, however, when it was developed into the highly successful C-17 Globemaster III, which included several YC-15 innovations, such as under-surface blowing.
The first flight was August 26, 1975.
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