Turbomeca Turmo

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Turbomeca Turmo IIIB.jpg
Turbomeca Turmo IIIB
Type Turboshaft/turboprop
Manufacturer Turbomeca
Major applications Aérospatiale Puma
Aérospatiale Super Frelon
Developed into Bristol Siddeley Nimbus

The Turbomeca Turmo is a French turboshaft engine developed for helicopter use. A descendant of Turbomeca's pioneering Artouste design, later versions delivered around 1,200 kW (1,610 shp). A turboprop version was developed for use with the Breguet 941 transport aircraft.

Current versions are built in partnership with Rolls-Royce, and the engine is produced under licence by the Chinese Changzhou Lan Xiang Machinery Works as the WZ-6 and Romanian Turbomecanica Bucharest as the Turmo IV-CA.


Turmo IIIC
A 890 kW (1,200 hp) turboshaft powering the Sud-Aviation Frelon prototypes.
Turmo IIIC2
Developed from the IIIC delivering 970 kW (1,300 hp) maximum output
Turmo IIIC3
Maximum rating 1,100 kW (1,500 hp) at 33,500 rpm for production Super Frelon helicopters
Turmo IIIC4
Turmo IIIC5
Turmo IIIC6
Turmo IIIC7
Turmo IIID
Turboprop for the proposed Breguet Br 942 STOL transport, maximum rating 913 kW (1,225 hp).
Turmo IIID2
996 kW (1,335 hp) at 22,460 free turbine rpm
Turmo IIID3
1,080 kW (1,450 hp) at 33,500 rpm
Turmo IVB
Turmo IVC
Turmo IV-CA
Licence production in Romania
Turmo VI
Turboprop engine with two axial stages, one centrifugal compressor stage and two free power turbine stages, rated at 1,300 kW (1,800 hp) at 32,000 rpm.
Licence production at the Changzhou Lan Xiang Machinery Works in the People's Republic of China.



Specifications (Turmo IIIC7)[edit]

Data from Flight International.[1]

General characteristics

  • Type: Two-shaft turboshaft
  • Length: 182 cm (71.6 in)
  • Diameter: 71.6 cm (28.2 in)
  • Dry weight: 325 kg (716 lb)


  • Compressor: Single-stage axial, single-stage centrifugal
  • Combustors: Annular, reverse-flow
  • Turbine: Two-stage compressor turbine, two-stage power turbine


See also[edit]

Related lists


  1. ^ Flight International 7 January 1978, p. 69. Retrieved: 18 December 2012
  • Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 163.

External links[edit]