Editing Hyper engine (section)

==Program end==
In the end, all of these programs were canceled, and the surviving engines became museum pieces.

Ironically, engines that were not considered under the program; the [[Allison V-1710]], [[Pratt & Whitney R-2800 Double Wasp]], [[Wright R-3350 Duplex-Cyclone]] and [[Pratt & Whitney R-4360 Wasp Major]], all surpassed the USAAC requirements, and continue flying into the 21st century, primarily flying restored [[warbird]] aircraft.