Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Nazarin ya nuna cewa mai tsayayyar tsayayyar tsaye bai isa ba a manyan kusurwoyi na kai hari, kuma an canza shi zuwa masu tsayayyar tsayayyar tsaye guda biyu, wanda aka ɗora a 45 °, wanda ya haifar da ƙirar " kwanciyar hankali na tsawon lokaci ", wanda ke haɓaka haɓaka. Northrop bai kasance da tabbaci ba a cikin sarrafawa ta hanyar waya kuma ya riƙe sarrafawar jirgin da aka yi ta hanyar inji. Jirgin da aka samu, wanda aka bayyana a ranar 28 ga Janairu, 1971, ya tallata matsakaicin nauyin 40,000 lb (18,144 kg) da matsakaicin saurin Mach 2, amma ya tayar da sha'awa kaɗan tsakanin masu siye na ƙasashen waje. An ƙaddamar da samfurin farko (lambar lamba 72-1569) a Hawthorne a ranar 4 ga Afrilu, 1974; Jirginsa na farko a Edwards AFB ya zo a ranar 9 ga Yuni tare da Henry "Hank" Chouteau a kan sarrafawa yana tashi na tsawon minti 61 yana kaiwa tsawan ƙafa 18,000 da matsakaicin saurin mil 610 a kowace awa. Chouteau daga baya ya lura cewa, "Lokacin da masu zanenmu suka ce a cikin YF-17 za su ba da jirgin sama ga matukin jirgi, suna nufin hakan. Jirgin jirgin sama ne na matukin jirgi". Na biyu YF-17 (s / n 72-1570) ya fara tashi a ranar 21 ga Agusta. Ta hanyar 1974, YF-17 ya yi gasa da Janar Dynamics YF-16. Kayan samfurin YF-17 guda biyu sun tashi 288 gwajin jirgi, jimillar awanni 345.5. YF-17 ya sami saurin gudu na Mach 1.95, babban nauyin nauyin 9.4 g, da kuma mafi girman tsawo na fiye da 50,000 ft (15,000 m). Zai iya samun kusurwar kai hari na 34 ° a cikin jirgin sama, da 63 ° a hawa a 50 kt (58 mph, 93 km / h).  Tambaya: Sa'o'i nawa ne YF-17s suka tashi?
345.5 da kuma