STAL Dovern

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Dovern
STAL Dovern.jpg
Type Turbojet
Manufacturer Svenska Turbinfabriks AB Ljungström
First run 1951
Major applications Saab 35 Draken (intended)

The STAL Dovern was a Swedish turbojet design of the early 1950s, named after a lake in Finspångs municipality in Östergötland, Sweden.[1] Intended to power the Saab 35 Draken, this aircraft was powered by the Rolls-Royce Avon instead. The Dovern did not enter production.

Design and development[edit]

The STAL company had been designing gas turbine engines since 1935. Their first running engine was the Skuten (witch), ground tested in 1949 but not flown.[2] The Dovern was the next design, featuring a nine-stage axial compressor and single-stage turbine. First run in 1951, the engine was flight tested during 1953 using an Avro Lancaster provided by Air Service Training. The engine was installed underneath in a nacelle faired-in to the Lancaster's bomb bay. After several thousand hours of ground running and more than 300 hours of flight testing the engine was not selected, the Rolls-Royce Avon being preferred.[3]

Applications[edit]

Variants[edit]

Dovern
Base variant.
Dovern IIA
Basic engine without de-icing
Dovern IIB
Compressor bleed air system added for ice protection.
Dovern IIC
Afterburning version producing 45 kN (10,200 lbf) thrust.

Specifications (Dovern IIB)[edit]

Data from Flight.[4] Jane's 1955-56[2]

General characteristics

  • Type: Turbojet
  • Length: 1,095 mm (43.11 in)
  • Diameter: 3,850 mm (151.57 in)
  • Dry weight: 1,220 kg (2,690 lb) dry

Components

  • Compressor: Nine-stage axial flow
  • Combustors: Nine combustion chambers
  • Turbine: Single-stage
  • Fuel type: Aviation kerosene to D.Eng R.D. 2482
  • Oil system: Dry sump with gear pressure and scavenge pumps at 240–310 kilopascals (35–45 psi)

Performance

See also[edit]

Comparable engines
Related lists

References[edit]

Notes
  1. ^ "Sjöareal och sjöhöjd" (.pdf) (in Swedish). Swedish Meteorological and Hydrological Institute. Retrieved 12 April 2014. 
  2. ^ a b Bridgman, Leonard (1955). Jane's all the World's Aircraft 1955-56. London: Jane's all the World's Aircraft Publishing Co. Ltd. 
  3. ^ Gunston 1989, p. 165.
  4. ^ Aero engines 1954 - Flight - 9 April 1954, p. 467 Retrieved: 6 June 2012
Bibliography
  • Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
  • Kay, Anthony L. (2007). Turbojet History and Development 1930-1960 Volume 2:USSR, USA, Japan, France, Canada, Sweden, Switzerland, Italy and Hungary (1st ed.). Ramsbury: The Crowood Press. ISBN 978-1861269393.