Ngitshele ngeSukhoi-Gulfstream
Context:I-Sukhoi-Gulfstream S-21 kwakuyi-jet yebhizinisi yaseRussia-yaseMelika.  Ekuqaleni kwawo-1990, i-Gulfstream Aerospace ne-Sukhoi Design Bureau baqala umzamo ohlanganyelwe wokuthuthukisa indiza yebhizinisi encane engaphansi kwezwi, igama lekhodi elithi S-21. Ngenxa yesidingo semakethe esiphikisanayo sokuhamba ngezindiza kwezentengiselwano, ukuzibophezela kuphrojekthi kwaphela amandla futhi ukubambezeleka kwanda.  I-Gulfstream yagcina ixazulule ubudlelwano, yize iSukhoi yaqhubeka nokusebenza ku-S-21.  I-S-21 ingakwazi ukuhamba ngesivinini esingu-Mach 2+ futhi ucwaningo oluningi nentuthuko kuye kwaya ekuphatheni ukuphazamiseka kwemiphumela ye-transonic phenomena ehlobene nesivinini somoya esingu-Mach 1.  Kusukela ngo-2012, iphrojekthi ibingazange ithole noma iyiphi imali yesikhathi sokuthuthukiswa sika-2013-2025 futhi ibonakala ikhanseliwe.
I-Sukhoi-Gulfstream S-21 kwakuyi-jet yebhizinisi yaseRussia-yaseMelika.  Ekuqaleni kwawo-1990, i-Gulfstream Aerospace ne-Sukhoi Design Bureau baqala umzamo ohlanganyelwe wokuthuthukisa indiza yebhizinisi encane engaphansi kwezwi, igama lekhodi elithi S-21. Ngenxa yesidingo semakethe esiphikisanayo sokuhamba ngezindiza kwezentengiselwano, ukuzibophezela kuphrojekthi kwaphela amandla futhi ukubambezeleka kwanda.