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Sukhoi-Gulfstream S-21 was a projected Russian-American supersonic business jet.

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S-21
Sukhoi SSBJ project model
Role	Supersonic business jet Type of aircraft
Manufacturer	Sukhoi Design Bureau/Gulfstream Aerospace

In the early 1990s, Gulfstream Aerospace 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.[1]

Gulfstream eventually dissolved the partnership, although Sukhoi continued work on the S-21.

The S-21 would be capable of sustained cruise at Mach 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.[2]

Specifications (S-21)

General characteristics

• Crew: 2
• Capacity: 6–10 passengers and 2,999 lb (907 kg) useful load
• Length: 124 ft 2 in (37.86 m)
• Wingspan: 65 ft 5 in (19.93 m)
  
• Wingsweep: 32° unswept 68° swept
• Height: 27 ft 1 in (8.26 m)
• Empty weight: 54,167 lb (24,570 kg)
• Max takeoff weight: 114,200 lb (51,800 kg)
  
  • With Fuel: 58,465 lb (26,519 kg)
• Powerplant: 3 × Aviadvigatel D-21A1 turbofan, 16,535 lbf (73.55 kN) thrust each

Performance

• Maximum speed: Mach 2+
• Range: 4,600 mi (7,403 km, 4,000 nmi) at Mach 0.95
  
• Range: 2,715 mi (4,369 km, 2360 nmi) at Mach 1.4
• Service ceiling: 63,900 ft (19,477 m)
• Thrust/weight: 0.43

See also

• Business jet
• Hypersonic transport
• Supersonic business jet
• Supersonic transport

Aircraft of comparable role, configuration, and era

• Aerion SBJ
• QSST
• Quiet Spike
• Tupolev Tu-444

Related lists

• List of civil aircraft

References

External links

Media related to Sukhoi S-21 at Wikimedia Commons

На других языках

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[de] Suchoi S-21

Die Suchoi S-21 (russisch Сухой С-21) war ein Projekt zur Entwicklung eines Überschall-Businessjets.

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- [en] Sukhoi-Gulfstream S-21

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[ru] SSBJ

Sukhoi Supersonic Business Jet (SSBJ, С-21) — отменённый[источник не указан 1471 день] советский, затем российско-американский проект сверхзвукового пассажирского самолёта бизнес-класса, разрабатывавшегося ОКБ Сухого. В поисках финансирования ОАО Сухой сотрудничало по данному проекту с компаниями Gulfstream Aerospace, Dassault Aviation, а также рядом китайских компаний. В настоящее время дальнейшая судьба С-21, как и Ту-444, остаётся неясной.

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