Sukhoi-Gulfstream S-21 was a projected Russian-American

supersonic business jet A supersonic business jet (SSBJ) is a business jet travelling above the speed of sound: a supersonic aircraft. Some manufacturers are designing or have been designing SSBJs, but none are currently available. Usually intended to transport about t ...

. In the early 1990s,

Gulfstream Aerospace Gulfstream Aerospace Corporation is an American aircraft company and a subsidiary of General Dynamics. Gulfstream designs, develops, manufactures, markets, and services business jet aircraft. Gulfstream has produced more than 2,000 aircraft sinc ...

and the Sukhoi Design Bureau 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 weakened and delays mounted. Gulfstream eventually dissolved the partnership, although Sukhoi continued work on the S-21. The S-21 would be capable of sustained cruise at

Mach The Mach number (M or Ma), often only Mach, (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a Boundary (thermodynamic), boundary to the local speed of sound. It is named after the Austrian physi ...

2+ and much research and development has gone into the management of the troublesome transonic effects phenomena associated with near Mach 1 air speeds. As of 2012, the project had not received any funding for the 2013-2025 development period and appeared to be cancelled.

Specifications (S-21)

References

External links

{{Supersonic transport Abandoned civil aircraft projects 2000s Russian business aircraft S-21 Supersonic business jets Trijets 2000s United States business aircraft

Specifications (S-21)

See also

References

External links