Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Mukutanga 1937, USAAC akarayira Curtiss kuchinja mumwe P-36 itsva mvura-dzaserera turbo-supercharged Allison V-1710 injini pamwe 1,150 hp (860 kW). Yakasarudzwa Curtiss XP-37, ndege akashandisa yepakutanga Model 75 airframe pamwe radiators vakatasva pamativi fuselage kumativi injini. Kokiti yakaendeswa kure kumashure kuitira kuti pave nenzvimbo yemaradiator uye turbocharger yakakura, uye kuti ndege irambe yakadzikama. Ndege yakabhururuka muna April 1937, ichisvika 340 mph (550 km/h) pa 20,000 ft (6,100 m). Kunyange zvazvo turbo-supercharger akanga zvikuru isingavimbiki uye maonero kubva Cockpit pamusoro yasimuka uye kumhara akanga chaizvoizvo kusavapo, USAAC akanga zvakakwana intrigued kubudikidza akavimbisa kuita kuti arayire 13 basa bvunzo YP-37s uye kupembedza panguva chibvumirano mutengo $531,305.12. Yakagadziridzwa aerodynamics uye turbo-supercharger yakavimbika zvikuru, ndege yacho yakatanga kubhururuka muna June 1939. Zvisinei, simba rakanga risina kuvimbika uye chirongwa chacho chakarambidzwa nokuda kwechimwe chigadzirwa cheCurtiss, P-40.  Mubvunzo: Ndeipi gore rakatanga kubhururuka ndege iyi yakagadziridzwa?
Muna 1939