WSK SO-3

SO-1/SO-3

SO-1 engine on display at the Polish Aviation Museum
Type	Turbojet
National origin	Poland
Manufacturer	WSK PZL Rzeszów
First run	November 1948
Major applications	PZL TS-11 Iskra
Number built	580

The WSK SO-1 and WSK-SO-3 are Polish turbojet engines designed by the Instytut Lotnictwa (Institute of Aeronautics ) and manufactured by WSK PZL Rzeszów, to power the PZL TS-11 Iskra jet trainer. Thirty SO-1s were built, this being superseded by the improved SO-3, of which a further 580 were built.^[1] The engine has a seven-stage compressor, annular combustion chambers, and a single-stage turbine.

Variants

SO-1: Original production. Overhaul life 200 hours.^[2]
SO-3: Improved version of SO-3, intended for tropical use. Modified compressor, combustion chamber and turbine.^[2] Overhaul life 400 hours.^[3]
SO-3W22: Modified version for PZL I-22 Iryda, 10.79 kN (2,425 lbf) rating, renamed PZL-5.^[4]

Applications

Specifications (SO-3)

Compressor intake

Data from Jane's All The World's Aircraft 1988-89.^[2]

General characteristics

Type: Turbojet
Length: 2,157 mm (84.7 in)
Diameter: 707 mm (27.8 in) width, 764 mm (30.1 in) height
Dry weight: 321 kg (708 lb)

Components

Compressor: Seven-stage all-steel axial compressor
Combustors: Annular with 24 combustors
Turbine: Single-stage axial flow

Performance

Maximum thrust: 10.8 kN (2,425 lbf) take-off, 9.8 kN (2,205 lbf) continuous
Overall pressure ratio: 4.8:1
Specific fuel consumption: 29.6 g/(kN·s) (1.04 lb/(lbf·h))
Thrust-to-weight ratio: 3.4:1

References

Wikimedia Commons has media related to WSK SO-3.

↑ Lambert 1993, p.630.
1 2 3 Taylor 1988, p.699.
↑ http://www.amw.com.pl/zos_product_info.php?zos_products_id=59
↑ Taylor 1996, p.572.

Lambert, Mark. Jane's All The World's Aircraft 1993-94. Coulsdon, Surry, UK:Jane's Data Division, 1993. ISBN 0-7106-1066-1.
Taylor, John W. R. Jane's All The World's Aircraft 1988-89. Coulsdon, Surry, UK:Jane's Defence Data, 1988. ISBN 0-7106-0867-5.
Taylor, Michael J. H. Brassey's World Aircraft & Systems Directory 1996/97. London:Brassey's, 1996. ISBN 1-85753-198-1.

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