Curtiss YP-37

The Curtiss YP-37 was an American fighter aircraft developed by Curtiss-Wright in the late 1930s for the United States Army Air Corps (USAAC). A derivative of the Curtiss P-36 Hawk, the YP-37 was designed to improve performance by replacing the P-36's radial engine with a turbo-supercharged, liquid-cooled Allison V-1710 inline engine, resulting in a lengthened fuselage and a rearward-shifted cockpit. Although it demonstrated promising speed, the aircraft suffered from unreliable turbo-superchargers and poor visibility, leading to its cancellation after 14 units were built. The project was abandoned in favor of the more practical Curtiss P-40 Warhawk.