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From Wikipedia, the free encyclopedia

Type Turbojet
Manufacturer Tumansky
First run 1960
Major applications Mikoyan-Gurevich Ye-8
Developed from Tumansky R-11

The Tumansky R-21 was a Soviet turbojet engine of the 1960s. Used for development only, the project was canceled.

Design and development

The Tumansky R-21 was developed at Tushino motor plant (part of OKB-300), headed by Nikolai Georgievich Metskhvarishvili, as a twin-spool axial-flow afterburning turbojet. It was based on the Tumansky R-11 with the goal of increasing thrust and airflow, using a new six-stage compressor with a larger diameter and different rotor blades than its predecessor as well as a new afterburner chamber and variable exhaust nozzle. The increased pressure ratio and turbine inlet temperature required components to be fabricated from advanced alloys.[1] Several contemporary Soviet aircraft were planned to use the R-21, including the Sukhoi T-58, Sukhoi T-6 and the Mikoyan-Gurevich Ye-8. On September 11, 1962 an R-21, fitted to a Ye-8, exploded in mid-air after compressor failure; test pilot Georgy Mosolov survived the ejection at Mach 1.78, but he never fully recovered.[2] Shortly afterward the Ye-8 program was cancelled along with R-21 development in favour of heavier fighter planes such as the Mikoyan-Gurevich MiG-23, which required more powerful engines.


  • R-21F-300 – the only version built.

Specifications (R-21F-300)

General characteristics

  • Type: Afterburning turbojet
  • Length:
  • Diameter: 987 mm (38.9 in)
  • Dry weight: 1,250 kg (2,755 lb)



See also

Related development

Related lists


This page was last edited on 1 May 2021, at 19:27
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