Wax iiga sheeg diyaaradda Sukhoi-Gulfstream
Context:Sukhoi-Gulfstream S-21 wuxuu ahaa diyaarad ganacsi oo supersonic ah oo Ruush-Mareykan ah.  Horraantii 1990-yadii, Gulfstream Aerospace iyo Sukhoi Design Bureau waxay bilaabeen dadaal wada jir ah oo lagu horumarinayo diyaarad ganacsi oo yar oo supersonic ah, oo loo yaqaan 'S-21'. Sababtoo ah baahida suuq ee su'aasha leh ee safarka hawada ganacsi ee supersonic, ballanqaadka mashruuca ayaa daciifay oo dib u dhac ku yimid.  Gulfstream ugu dambeyntii waxay kala dirtay iskaashiga, in kasta oo Sukhoi ay sii waday shaqada S-21.  S-21 waxay awood u yeelan laheyd safar joogto ah Mach 2+ iyo cilmi baaris badan iyo horumarin ayaa loo galay maaraynta dhibaatooyinka dhibaatooyinka saameynta transonic ee la xiriira xawaaraha hawada ee Mach 1.  Laga soo bilaabo 2012, mashruucu ma helin wax maalgelin ah muddada horumarinta 2013-2025 wuxuuna u muuqday mid la joojiyay.
Diyaaradda Sukhoi-Gulfstream S-21 waxay ahayd diyaarad ganacsi oo supersonic ah oo Ruush-Mareykan ah.  Horraantii 1990-yadii, Gulfstream Aerospace iyo Sukhoi Design Bureau waxay bilaabeen dadaal wada jir ah oo lagu horumarinayo diyaarad ganacsi oo yar oo supersonic ah, oo loo yaqaan 'S-21'. Sababtoo ah baahida suuq ee su'aasha leh ee safarka hawada ganacsi ee supersonic, ballanqaadka mashruuca ayaa daciifay oo dib u dhac ku yimid.