<prompt> Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu: Passage: Mukutanga kwema1990, Gulfstream Aerospace neSukhoi Design Bureau vakatanga kushanda pamwe chete kuti vagadzire ndege duku yebhizimisi inopfuura inzwi, yakatumidzwa kuti S-21. Nokuda mubvunzo pamusika kudiwa vezvokutengeserana supersonic ndege kufamba, kuzvipira kuti chirongwa kuneta uye kunonoka vakaungana. Gulfstream pakupedzisira rakaparara kudyidzana, kunyange Sukhoi akaramba basa iri S-21. Mubvunzo: Ndeipi yakanga iri ndege iyo makambani maviri akagadzira pamwe chete?  <response>: S-21 