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Wikipedia / Turbomeca Turmo

The Turbomeca Turmo is a family of French turboshaft engines manufactured for helicopter use. Developed from the earlier Turbomeca Artouste, later versions delivered up to . A turboprop version was developed for use with the Bréguet 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.

Design and development

The Turmo was initially developed with a single-stage centrifugal compressor, annular combustion chamber and single stage turbine. Power output was from a single-stage free power turbine and was initially .

During early post-war helicopter development, the use of cold and hot rotor tip-jetss was widely investigated. To provide large mass-flow air for efficient operation of the tip-jets, Turbomeca developed a gas turbine driven gas producer, powered by the free power-turbine of the Turmo to deliver the required gas flow.

Variants

Data from:-Jane's all the World's Aircraft 1957–58

  1. Turmo I: The initial version of the Turmo; max continuous gearbox output at 3,000 rpm, at 33,750 rpm gas generator speed.

  2. Turmo II:Developed version of the Turmo I; max continuous gearbox output at 34,000 rpm gas generator speed.

  3. Turmo III:With 2-stage free power-turbine, pressure ratio 5.7:1; Maximum shaft output , max continuous at 33,400 rpm

  4. Turmo IIIB:

  5. Turmo IIIC:A turboshaft powering the Sud-Aviation Frelon prototypes.

  6. Turmo IIIC2: Developed from the IIIC delivering maximum output

  7. Turmo IIIC3: Maximum rating at 33,500 rpm for production Super Frelon helicopters

  8. Turmo IIIC4: Military variant.

  9. Turmo IIIC5:

  10. Turmo IIIC6:

  11. Turmo IIIC7:

  12. Turmo IIID:Turboprop for the proposed Breguet Br 942 STOL transport, maximum rating .

  13. Turmo IIID2: at 22,460 free turbine rpm

  14. Turmo IIID3: at 33,500 rpm

  15. Turmo IIIF: at 32,100 rpm for use on Turbotrain and Turboliner

  16. Turmo IVB: Military Variant

  17. Turmo IVC: Civil Variant

  18. Turmo IV-CA:Licence production in Romania

  19. Turmo VI:Turboprop engine with two axial stages, one centrifugal compressor stage and two free power turbine stages, rated at at 32,000 rpm.

  20. Turmo XII: for use on Class T 2000 Turbotrain and TGV 001.

  21. WZ-6:Licence production at the Changzhou Lan Xiang Machinery Works in the People's Republic of China.

Applications

  1. Turboshaft

  2. Sud-Est SE.3140 Alouette II

  3. Aérospatiale SA 321 Super Frelon

  4. Aérospatiale SA 330 Puma

  5. Bölkow Bo 46

  6. IAR 330

  7. SNCASE SE.3200 Frelon

  8. N.300 Naviplane

  9. Turboprop

  10. Breguet Br 940 Integral

  11. Bréguet 941

  12. Breguet 941S

  13. Automobile

  14. Renault Étoile Filante

  15. Train

  16. Turbotrain

  17. SNCF Class T 2000

  18. Turboliner

  19. TGV 001

Specifications (Turmo IIIC7)

See also

References

Further reading