Qeybta hoose ka eeg kadibna ka jawaab su'aasha kadib isla luqada sida qeybta: Qeybta: 1990s, Shaybaadhka Cilmi baarista Ciidanka Cirka (AFRL) wuxuu bilaabay barnaamijka HyTECH ee loogu talagalay kor u qaadista hypersonic. Pratt & Whitney waxay qandaraas ka heleen AFRL si ay u horumariyaan mashiinka scramjet-ka ee ku shaqeeya hydrocarbon kaas oo horseeday horumarinta mashiinka SJX61. Mashiinka SJX61 waxaa markii hore loogu talagalay NASA X-43C, kaas oo ugu dambeyntii la joojiyay. Mashiinka waxaa lagu dabaqay barnaamijka AFRL ee Scramjet Engine Demonstrator dhamaadkii 2003. Gawaarida tijaabada duulimaadka ee scramjet waxaa loo magacaabay X-51 27kii Sebtember 2005. Su'aal: Muxuu ahaa masiirka ugu dambeeya ee barnaamijka diyaaradaha NASA X-43C?
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