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https://en.wikipedia.org/wiki/Cessna_AT-17_Bobcat The Cessna AT-17 Bobcat was a twin-engined advanced trainer aircraft designed and made in the United States, and used during World War II to bridge the gap between single-engined trainers and twin-engined combat aircraft. The AT-17 was powered by...

more at http://www.thedrive.com/the-war-zone/17465/usaf-eyeing-new-props-and-upgraded-engines-to-breathe-extra-life-into-old-c-130hs ...."Since 2008, the 92-1536 has served as test bed for a number of proposed modifications to more than 130 other H-series aircraft still in service across the Air...

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