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R-11
Tumansky R-11
Preserved Tumansky R-11 turbojet engine at the Polish Aviation Museum

The Tumansky R-11 (initially AM-11) is a turbojet engine.

Design and development[]

The Tumansky R-11 was developed by A.A. Mikulin, S.K. Tumansky, and B.S. Stechkin as a twin-spool axial-flow high-altitude non-afterburning turbojet for Yakovlev Yak-25RV reconnaissance aircraft. This engine was the first Soviet twin-spool turbojet. It was first run in early 1956.[1] The basic design was very successful and it was evolved into Tumansky R-13 and Tumansky R-25. Also experimental Tumansky R-21 was an evolution of R-11. A total of 20,900 R-11 engines were built.

Variants[]

  • R-11V-300 - first production version, high-altitude, non-afterburning
  • R-11F-300 (R-37F) - afterburning version, entered production in 1956, used on MiG-21F, P and U.
  • R-11AF-300 - improved version for Yakovlev Yak-28B, L and U.
  • R-11F2-300 - new compressor, afterburner and nozzle, used on MiG-21P, PF and FL.
  • R-11AF2-300 - R-11F2-300 adapted for Yakovlev Yak-28I, R and P.
  • R-11F2S-300 - upgraded version for MiG-21PFM, PFS, S, U and UM, and for Sukhoi Su-15, UT and UM.
  • Shenyang WP-7, Chinese license built copies of the R-11

Specifications (R-11F2S-300)[]

General characteristics
  • Type: Afterburning turbojet
  • Length: 4,600 mm (181.1 in)
  • Diameter: 906 mm (35.7 in)
  • Dry weight: 1,124 kg (2,477 lb)
Components
  • Compressor: Axial compressor, 3-stage LP, 3-stage HP
Performance
  • Maximum thrust:
  • 38.7 kN (8,708 lbf) military power
  • 60.6 kN (13,635 lbf) with afterburner
  • Overall pressure ratio: 8.9:1
  • Turbine inlet temperature: 955 °C (1,750 °F)
  • Specific fuel consumption:
  • 97 kg/(h·kN) (0.95 lb/(h·lbf)) at idle
  • 242 kg/(h·kN) (2.37 lb/(h·lbf)) with afterburner
  • Thrust-to-weight ratio: 53.9 N/kg (5.5:1)


  • List of aircraft engines

References[]

Notes[]

  1. Gunston 1989, p.167.

Bibliography[]

External links[]

All or a portion of this article consists of text from Wikipedia, and is therefore Creative Commons Licensed under GFDL.
The original article can be found at Tumansky R-11 and the edit history here.
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