A farkon shekarun 1990, Gulfstream Aerospace da Sukhoi Design Bureau sun fara haɗin gwiwa don haɓaka ƙaramin jirgin sama na kasuwanci, lambar da ake kira S-21. Saboda ƙarancin buƙatun kasuwa don zirga-zirgar jiragen sama na kasuwanci, sadaukar da kai ga aikin ya raunana kuma jinkiri ya hau.A ƙarshe Gulfstream ya rushe haɗin gwiwa, kodayake Sukhoi ya ci gaba da aiki a kan S-21. Tambaya: Menene kamfanonin jiragen sama biyu suka ƙirƙira tare?
S-21 (a cikin Turanci)