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Walter Pollux

Walter Pollux IIR


The Walter Pollux was a Czechoslovakian nine-cylinder, aircooled, radial engine for powering light aircraft that first ran in 1936. The engine produced 335 kW (450 hp) at 1,800 rpm.

The first known use was on the Fieseler F 2 Tiger in 1934.


Pollux II
Direct drive engine

Pollux II-R
Geared engine, reduction ratio 0.666:1


Aero A.204
Avia B.122
Fieseler F2 Tiger
Praga BH-41


Pollux IIR
Type: 9-cylinder radial piston engine
Bore: 135 mm (5.3 in)
Stroke: 170 mm (6.7 in)
Dry weight: 340.6 kg (751 lb)
Valvetrain: One intake and one exhaust valve per cylinder
Fuel system: Carburettor
Fuel type: Petrol
Cooling system: Air-cooled
Power output: 358 kW (480 hp) at 2,070 rpm
Compression ratio: 6:1
Power-to-weight ratio: 1 kW/kg (0.64 hp/lb)






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