Yakovlev Yak-77
Role Short-range airliner
National origin Russia
Manufacturer Yakovlev
Introduction 1993
Status Project only
Number built 0

The Yakovlev Yak-77 was a planned large business or regional commuter jet. Work began in 1992, but no prototype was ever produced.[1]

History

The Yakovlev Yak-77 was to have been a large business jet and regional commuter, considerably larger than the earlier Yakovlev Yak-48. Little information has been released about this design.[1]

Development

Work on the Yak-77 began in 1992, the project manager being S A Yakovlev. The aircraft was to have two AE 3010/12 turbofans, uprated members of the Allison 3000 family of two-shaft turbofans, each with a takeoff rating of 4,500 kg (9,920 lb). Avionics were to have been a Collins Pro Line 4 system.[1][2]

In configuration for a business jet, the aircraft would have had seating for eight in a generous cabin. Configured as a regional commuter it would have seated 32 in rows of 2+2. Streatched versions with seating for up to 70 were studied. The aircraft was to have entered production at Saratov in 1994. Certification was expected in 1996 to 1997, though no prototype was ever produced.[1]

Specifications (Yak-77)

Data from Yakovlev aircraft since 1924[1]

General characteristics

  • Crew: 2
  • Capacity: 8 to 32 passengers
  • Length: 20.45 m (67 ft 1 in)
  • Wingspan: 21.55 m (70 ft 8 in)
  • Wing area: 55 m2 (590 sq ft) ~
  • Max takeoff weight: 25,234 kg (55,631 lb)
  • Powerplant: 2 × Allison AE 3010/12 turbofan engines, 44.1 kN (9,920 lbf) thrust each

Performance

  • Maximum speed: 800 km/h (500 mph, 430 kn)
  • Max operating Mach no.: M0.8
  • 'Economical cruise Mach no.: M0.75 / 800 km/h (500 mph; 430 kn) at 12,500 m (41,010 ft) up
  • Range: 10,000 km (6,200 mi, 5,400 nmi) with 8 pax
6,000 km (3,700 mi; 3,200 nmi) with 32 pax
  • Service ceiling: 12,500 m (41,000 ft)
  • Balanced runway length: 2,200 m (7,218 ft)

References

  1. 1 2 3 4 5 Gordon, Yefim; Gunston, Bill (1997). Yakovlev aircraft since 1924 (1st ed.). London: Putnam. p. 213. ISBN 0851778720.
  2. ↑ Grant, Tina (6 August 1996). International directory of company histories. Vol. 15. St. James Press. ISBN 978-1558622180.

See also

Aircraft of comparable role, configuration, and era

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