Sukhoi-Gulfstream S-21 was a projected Russian-American supersonic business jet. In the early 1990s Gulfstream Aerospace and the Sukhoi Design Bureau of Moscow began a joint effort to develop a supersonic small business jet code named the S-21. Due to questionable market demand for commercial supersonic air travel commitment to the project wavered and delays mounted. Gulfstream eventually dissolved the partnership although Sukhoi continued work on the S-21.
Made by Sukhoi-Gulfstream.