page_title: Curtiss P-40 Warhawk variants
section_title: XP-37
hierarchical_section_title: Curtiss P-40 Warhawk variants / Allison-engined Model 75 / XP-37
caption_attribution_description: Curtiss XP-37
context_page_description: The Curtiss P-40 Warhawk was a WWII fighter aircraft that was developed from the P-36 Hawk, via the P-37. Many variants were built, some in large numbers, under names including the Hawk, Tomahawk and Kittyhawk.
context_section_description: In early 1937, after realizing the Hawk 75 was inferior to more modern European designs, the USAAC ordered one P-36 to be modified with an Allison V-1710 inline engine.  The prototype Hawk was fitted with a turbo-supercharged 1,150 hp (860 kW) Allison V-1710-11 engine as the XP-37 (company designation Model 75I).  The cockpit was moved back towards the tail to make room for the massive supercharger, and the engine was cooled by two radiators on either side of the nose.  Armament was one .30 M1919 Browning MG and one .50 M2 Browning MG mounted in the nose.  The XP-37 was plagued with supercharger and visibility problems.
caption: Curtiss XP-37
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