WesWorld

Repository for information pertaining to aero engines manufactured by the Hirth firm.

Type: 4 cylinder air cooled inverted inline
Bore: 105mm
Stroke: 115mm
Displacement: 3998 cm3
Length: 957mm
Width: 505mm
Height: 726mm
Dry weight: 104kg

Valvetrain: 1 inlet and 1 exhaust valve per cylinder
Fuel type: 77 octane
Cooling system: air

Power output: 105hp at 2500 RPM

Type: 6 cylinder air cooled inverted inline
Bore: 105 mm
Stroke: 115 mm
Displacement: 5.976 litres
Length: 1,276 mm
Width: 490 mm
Height: 735 mm
Dry weight: 149 kg

Valvetrain: 1 inlet and 1 exhaust valve per cylinder, operated by push-rods and rockers
Fuel system: 2 Sum down draught carburetters, automatic mixture control and suitable for inverted flight. Twin Bosch magnetos.
Oil system: Fresh oil, metered for each cylinder. Rockers in oil bath.
Cooling system: air

Power output: 160 hp

Type: Eight cylinder 60 degree inverted V inline engine
Bore: 105 mm
Stroke: 115 mm
Displacement: 7.97 litres
Length: 1,289 mm
Width: 683 mm
Height: 815 mm
Dry weight: 208 kg

Power output: 280 hp at 3,000 rpm

Type: Inverted 60o V-12 cylinder air cooled piston
Bore: 105 mm
Stroke: 115 mm
Displacement: 11.94 litres
Length: 1,507 mm
Width: 680 mm
Height: 853 mm
Dry weight: 270 kg

Supercharger: Light alloy centrifugal type, driven at 3.86 times crankshaft speed.
Fuel system: Supercharger drew through twin Pallas 65VH2 carburetters with automatic mixture control and equipped for inverted flight. One Bosch double magneto with automatic advance.
Oil system: Metered fresh oil to cylinder barrels and crankshaft bearings. Splash lubrication for supercharger and camshaft. Stökicht Sun and planet reduction gear lubricated by high pressure oil.
Cooling system: Air

Power output: maximum 360 hp at 3,000 rpm, rated 300 hp at 2,810 rpm, take off 400 hp