Curtiss XP-37
![]() YP-37 The Curtiss Aeroplane Company of Buffalo, New York, used the basic airframe of the Model 75 Hawk to create the re-engined XP-37. The XP-37's Allison V-1710-11, equipped with a General Electric turbo-supercharger, was rated at 1,000 bhp. Engineers at Curtiss promised the US Army Air Corps that this in-line powered offspring of the more familiar P-36 Mohawk (or Hawk 75) would be able to attain a level flight speed of no less than 340 mph.
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