Tumansky R-11

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

[edit] Background

The Tumansky R-11 was developed by A.A.Mikulin, S.K. Tumansky, and B.S. Stechkin as an axial-flow high-altitude non-afterburning turbojet for Yakovlev Yak-25RV reconnaissance aircraft. It entered production in 1954. The basic design was very successful and it was evolved into Tumansky R-13 and Tumansky R-25. A total of 20,900 R-11 engines were built.

[edit] 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-15TM, UT and UM.

[edit] 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

Performance

• 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)