Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: N'afọ 1990, ụlọ ọrụ nyocha nke ndị agha ụgbọelu (AFRL) bidoro mmemme HyTECH maka ngwa ngwa hypersonic. Pratt & Whitney natara nkwekọrịta site na AFRL iji mepụta engine scramjet nke na-agba mmanụ ọkụ nke mere ka mmepe nke SJX61 engine. E bu n'uche ka SJX61 engine maka NASA X-43C, nke mechara kagbuo. A na-eji engine ahụ eme ihe na AFRL's Scramjet Engine Demonstrator program na ngwụsị afọ 2003. A họpụtara ụgbọelu nnwale ụgbọelu scramjet dị ka X-51 na 27 Septemba 2005.  Ajụjụ: Olee ihe mechara mee ụgbọelu X-43C nke NASA?
kagbuo