Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A farkon 1937, USAAC ta umarci Curtiss don daidaitawa daya P-36 zuwa sabon injin Allison V-1710 mai sanyaya mai sanyaya mai sanyaya tare da 1,150 hp (860 kW). An sanya Curtiss XP-37, jirgin sama ya yi amfani da ainihin samfurin 75 na jirgin sama tare da radiators da aka saka a gefen fuselage a kusa da injin. An matsar da matukin jirgi zuwa baya don a sami wuri don radiators da tsarin turbocharger mai girma, da kuma daidaita jirgin. Jirgin ya tashi a watan Afrilu na 1937, ya kai 340 mph (550 km / h) a 20,000 ft (6,100 m). Kodayake turbo-supercharger ba shi da tabbaci sosai kuma hangen nesa daga matukin jirgi a lokacin tashi da saukowa kusan babu shi, USAAC ta kasance mai ban sha'awa da aikin da aka yi alkawarinsa don yin odar 13 gwajin gwajin YP-37s da kayayyakin ajiya a farashin kwangila na $ 531,305.12. Da yake yana da ingantattun kayan aiki da kuma turbo-supercharger, jirgin ya fara tashi a watan Yuni na 1939. Duk da haka, powerplant ya kasance ba abin dogara da kuma aikin da aka soke a cikin ni'imar wani Curtiss zane, da P-40.  Tambaya: A wace shekara ne jirgin saman da aka inganta ya fara tashi?
1939 shekara