Lyulka AL-7
| {{Infobox Aircraft Begin
|name= AL-7 |image = Lyulka AL-7F turbojet.jpg |caption = Lyulka AL-7F turbojet engine at the Polish Aviation Museum }} {{Infobox Aircraft Engine |type= Turbojet |national origin = |manufacturer= Lyulka |first run= 1952 |major applications=Sukhoi Su-7 |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
The Lyulka AL-7 was a turbojet designed by Arkhip Mikhailovich Lyulka and produced by his Lyulka design bureau. The engine was produced between 1954 and 1970.Gunston 1989, p.100.
Design and development
The AL-7 had supersonic airflow through the first stage of the compressor. TR-7 prototype, developing 6,500 kgf (14,330 lbf, 63.7 kN) of thrust, was tested in 1952, and the engine was initially intended for Ilyushin's Il-54 bomber. The afterburning AL-7F version was created in 1953. In April 1956, the Sukhoi S-1 prototype, equipped with the AL-7F, exceeded Mach 2 at 18,000 m (70,900 ft), which led to the production of the Su-7 "Fitter" and Su-9 "Fishpot", equipped with this engine.Green, William and Gordon Swanborough. The Great Book of Fighters. St. Paul, Minnesota: MBI Publishing, 2001. {{ISBN|0-7603-1194-3}}.{{clarify|date=March 2011|reason=What about Su-11, and the engine versioning F-1, F-2, F-3, ...?}} Later, the engine was adopted for the Tu-128 "Fiddler" in 1960, and for the AS-3 "Kangaroo" cruise missile. The Beriev Be-10 jet flying boat used a non-afterburning AL-7PB with stainless steel compressor blades.
Variants
;AL-7:Non-afterburning military turbojet.
;AL-7F: Afterburning versions of the AL-7F, typically, the AL-7F1-100 used in the Sukhoi T-49.
Specifications (AL-7F)
{{jetspecs
|
|ref={{citation needed|date=June 2012}}
|type=Afterburning turbojet
|length={{cvt|6650|mm|in|abbr=on}}
|diameter={{cvt|1300|mm|in|abbr=on}}
|weight= {{convert|2010|kg|abbr=on}}
|compressor=Single-spool turbojet 9-stage axial compressor
|combustion=Annular
|turbine=2-stage axial
|fueltype=
|oilsystem=
|power=
|thrust=
- 67.1 kN (15,075 lbf) military power
- 98.1 kN (22,050 lbf) with afterburner
|compression=9.5:1
|aircon=
|turbinetemp=860 °C (1,580 °F)
|fuelcon=
|specfuelcon=
- 95.0 kg/(h·kN) (0.94 lb/(h·lbf)) at idle
- 98.9 kg/(h·kN) (0.97 lb/(h·lbf)) military power
- 229.0 kg/(h·kN) with afterburner
|power/weight=
|thrust/weight= 3.4; 5.0 with afterburner
}}
See also
{{aircontent
|see also=
|related=
|lists=
|similar engines=
}}
References
=Notes=
{{reflist}}
=Bibliography=
{{refbegin}}
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}
{{refend}}
External links
{{commons category|Lyulka AL-7}}
- [http://www.leteckemotory.cz/motory/al-7 AL-7 on LeteckeMotory.cz] (cs)
{{Lyulka aeroengines}}