STAL Dovern
{{short description|1950s Swedish turbojet aircraft engine}}
| {{Infobox aircraft begin
|name= Dovern |image=STAL Dovern.jpg |caption= }}{{Infobox aircraft engine |type=Turbojet |manufacturer=Svenska Turbinfabriks AB Ljungström |first run=1951 |major applications= Saab 35 Draken (intended) |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
The STAL Dovern was a Swedish turbojet design of the early 1950s, named after a lake in Finspång municipality in Östergötland, Sweden.{{cite web|title=Sjöareal och sjöhöjd|url=http://www.smhi.se/k-data/hydrologi/sjoar_vattendrag/sjoareal_SVAR_2009.pdf|publisher=Swedish Meteorological and Hydrological Institute|access-date=12 April 2014|language=sv|format=.pdf|archive-date=6 March 2012|archive-url=https://web.archive.org/web/20120306085515/http://www.smhi.se/k-data/hydrologi/sjoar_vattendrag/sjoareal_SVAR_2009.pdf|url-status=dead}} 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
The STAL company had been designing steam turbine engines and in the 1940s begun designing gas turbine engines. Their first running engine was the Skuten, ground tested in 1949 but not flown.{{cite book| last= Bridgman| first= Leonard| title= Jane's all the World's Aircraft 1955-56| year= 1955| publisher= Jane's all the World's Aircraft Publishing Co. Ltd.| location= London}} 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.Gunston 1989, p. 165.
Applications
- Avro Lancaster (test bed only)
- Saab 35 Draken (intended application)
Variants
;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 {{convert|10200|lbf|kN|abbr=on|order=flip}} thrust.
Specifications (Dovern IIB)
{{jetspecs
|
|ref=Flight.[http://www.flightglobal.com/pdfarchive/view/1954/1954%20-%201015.html Aero engines 1954 - Flight - 9 April 1954, p. 467] Retrieved: 6 June 2012 Jane's 1955-56
|type=Turbojet
|length={{convert|3850|mm|in|abbr=on|2}}
|diameter={{convert|1095|mm|in|abbr=on|2}}
|weight={{convert|1220|kg|lb|abbr=on}} dry
|compressor=Nine-stage axial flow
|combustion=Nine combustion chambers
|turbine=Single-stage
|fueltype=Aviation kerosene to D.Eng R.D. 2482
|oilsystem=Dry sump with gear pressure and scavenge pumps at {{convert|35|-|45|psi|kPa|order=flip}}
|power=
|thrust={{convert|7260|lbf|kN|abbr=on|2|order=flip}} at 7,200 rpm at sea level for take-off
|compression=5.2:1
|aircon={{convert|54.9|kg/s|lb/s|abbr=on}}
|turbinetemp={{convert|870|C|K F|abbr=on}}
|fuelcon=
|specfuelcon= 0.009 kg/(kN h) (0.92 lb/(lbf h))
|power/weight=
|thrust/weight=2.76:1
}}
See also
{{aircontent
|see also=
|related=
|similar engines=
|lists=
}}
References
{{Commons category}}
;Notes
{{reflist}}
;Bibliography
{{refbegin}}
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}
- {{cite book|last=Kay|first=Anthony L.|title=Turbojet History and Development 1930-1960 Volume 2:USSR, USA, Japan, France, Canada, Sweden, Switzerland, Italy and Hungary |publisher=The Crowood Press|location=Ramsbury|date=2007|edition=1st|isbn=978-1861269393}}
{{refend}}
{{Swedish military gas turbine aeroengines}}