Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  N'ụzọ: Nnyocha gosiri na otu onye na-eme ka ihe na-eguzogide ihe na-ezughị ezu na nnukwu akụkụ nke mwakpo, a gbanwere ya na ndị na-eme ka ihe na-eguzogide ihe abụọ, na-atụgharị na 45 °, na-eme ka e nwee "ntọala ogologo oge", nke na-eme ka njikwa dịkwuo mma. Northrop ejighi obi ike na njikwa ụgbọ elu site na waya ma jigide njikwa ụgbọ elu na-arụ ọrụ. Ụgbọelu nke a rụpụtara, nke ekpughere na 28 Jenụwarị 1971, kwupụtara oke ibu nke 40,000 lb (18,144 kg) na oke ọsọ nke Mach 2, mana ọ kpalitere obere mmasị n'etiti ndị na-azụ mba ọzọ. E gosipụtara ihe mbụ (nọmba usoro 72-1569) na Hawthorne na 4 Eprel 1974; ụgbọ elu mbụ ya na Edwards AFB bịara na 9 June na Henry "Hank" Chouteau na njikwa na-efe efe maka nkeji 61 na-eru elu nke 18,000 ụkwụ na ọsọ ọsọ nke 610 kilomita kwa elekere. Chouteau mechara kwuo na, "Mgbe ndị na-emepụta anyị kwuru na YF-17 ha ga-enyeghachi ụgbọelu ahụ na onye ọkwọ ụgbọelu, ha pụtara ya. Ọ bụ ụgbọelu ndị na-anya ụgbọelu na-alụ ọgụ". YF-17 nke abụọ (s/n 72-1570) gbara ụgbọ elu mbụ ya na 21 Ọgọst. Site na 1974, YF-17 na-asọmpi megide General Dynamics YF-16. Abụọ YF-17 prototypes gbara 288 ule ụgbọ elu, ngụkọta nke 345.5 awa. YF-17 ruru ọsọ ọsọ nke Mach 1.95, oke ibu nke 9.4 g, na oke elu nke ihe karịrị 50,000 ft (15,000 m). Ọ nwere ike iru 34° n'akụkụ nke ọgụ na-aga n'ihu na ụgbọ elu, na 63° na ịrị elu na 50 kt (58 mph, 93 km/h).  Ajụjụ: Olee mgbe ụgbọelu YF-17 nke abụọ fepụrụ?
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