Motorlet M-701

The Motorlet M-701 is a Czechoslovak jet engine. It was used to power the Aero L-29 Delfín jet trainer, with about 9,250 engines built between 1961 and 1989.

Motorlet M701 turbojet engine (displayed at the Aviation Museum in Košice, Slovakia)
Type Turbojet
National origin Czechoslovakia
Manufacturer Motorlet
First run 1958
Major applications Aero L-29 Delfín
Produced 1961-1989
Number built more than 9,250 [1]

Development and design

In 1955, the Czechoslovakian aero-engine company Motorlet commenced design of a new turbojet engine to power the Aero L-29, a jet trainer being designed by Aero for a competition to equip all Warsaw Pact air forces. The resulting design, designated Motorlet M-701 was a single shaft centrifugal compressor turbojet and was the first jet engine designed in Czechoslovakia (although Motorlet had previously built the Klimov VK-1 under license).[2]

The M-701 was first run in 1958, and engine no.4 was tested on an Avia B-228 flying laboratory in December 1959.[3] Engine no.8 powered the third prototype L-29 when it flew on 12 July 1960 (the first two prototypes had flown the previous year powered by Rolls-Royce Viper engines). The L-29 was selected as the winner of the competition, and was ordered in large numbers, with the M-701 entering production at Jinonice near Prague in 1961. By the time production ended in 1989, more than 9,250 had been built.[3]



Data from Jane's All the World's Aircraft 1971-72.[4]

General characteristics

  • Type: Single shaft centrifugal flow turbojet engine
  • Length: 2,067 mm (81.38 in)
  • Diameter: 896 mm (35.28 in) (Max width): Max height 928 mm (36.53 in)
  • Dry weight: 330 kg (728 lb)


  • Compressor: Single-stage centrifugal
  • Combustors: 7 straight flow combustion chambers
  • Turbine: Single-stage axial-flow with 61 blades


See also

Related lists


  1. M-701 at slovak language
  2. "Walter (Motorlet) M701 (Czech Republic) - Jane's Aero-Engines:". Jane's Aero-Engines. Jane's. 16 July 2008. Retrieved 13 January 2009.
  3. Rada, Jiří (1967). "Projekt letadla L-29 a motoru M701". (in Czech). Retrieved 28 September 2015.
  4. Taylor, John W.R., ed. (1972). Jane's all the world's aircraft. the annual record of aviation development and progress (Sixty-second year of issue. ed.). London: Jane's. p. 631. ISBN 978-0354000949.
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