Lyulka AL-7
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.[1]
| AL-7 | |
|---|---|
 | |
| Lyulka AL-7F turbojet engine at the Polish Aviation Museum | |
| Type | Turbojet |
| Manufacturer | Lyulka |
| First run | 1952 |
| Major applications | Sukhoi Su-7 Sukhoi Su-9 Sukhoi Su-11 Tupolev Tu-28 Beriev Be-10 Kh-20 |
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.[2] 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)
Data from
General characteristics
- Type: Afterburning turbojet
- Length: 6650 mm
- Diameter: 1300 mm
- Dry weight: 2,010 kg (4,430 lb)
Components
- Compressor: Single-spool turbojet 9-stage axial compressor
- Combustors: Annular
- Turbine: 2-stage axial
Performance
- Maximum thrust:
- 67.1 kN (15,075 lbf) military power
- 98.1 kN (22,050 lbf) with afterburner
- Overall pressure ratio: 9.5:1
- Turbine inlet temperature: 860 °C (1,580 °F)
- Specific fuel consumption:
- 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
- Thrust-to-weight ratio: 3.4; 5.0 with afterburner
References
Notes
- Gunston 1989, p.100.
- Green, William and Gordon Swanborough. The Great Book of Fighters. St. Paul, Minnesota: MBI Publishing, 2001. ISBN 0-7603-1194-3.
Bibliography
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
