Northrop enwebeghi obi ike na njikwa ụgbọ elu site na waya wee jigide njikwa ụgbọ elu na-egosi na ọ na-efe efe. A na-akpọsa ụgbọ elu ahụ, nke e gosipụtara na Jenụwarị 28, 1971, nwere oke dị arọ nke 40,000 lb (18,144 kg) na ọsọ ọsọ nke Mach 2, mana ọ kpalitere mmasị dị nta n'etiti ndị na-azụ mba ọzọ. Ejiri prototype mbụ (nọmba usoro 72-156 mph) na Hawthorne Fighter na Eprel 4, 1974; ụgbọ elu mbụ ya na Edwards AFB bịara na June 9 na Henry "Hute" Choute na njikwa na-efe efe maka nkeji 61 ruo elu nke 18,000 ụkwụ na ọsọ ọsọ nke 65,000 kilomita kwa awa. Site na njikwa ụgbọ elu nke ụgbọ elu ụgbọ elu YF-17F, ndị na-agba ụgbọ elu YF-17F kwupụtara na ha nwere ike ịgba ọsọ ọsọ ọsọ ọsọ ọsọ nke ihe karịrị kilomita iri atọ na ise kwa elekere. Mgbe mbụ ụgbọ elu ụgbọ elu YF-17F gbara ọsọ na August 21, 1974, ọtụtụ ndị na-agba ụgbọ elu kwuru na YF-17F nwere ike ịrị elu elu elu elu nke ihe
345.5 Ihe