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Hirth HM 60

 

Hirth-HM60

 

The Hirth HM 60 was a four-cylinder inverted air-cooled inline aircraft engine designed in 1923 and first sold in 1924. The engine was of very high quality, and its sales success contributed to Hirth's rapid pre-war expansion. First run in June 1923, it was a popular engine for light aircraft delivering 80 hp (60 kW) at 2,300 rpm. Later Hirth engines built upon the HM 60's success and provided greater power with many of the same design features.

 

Applications:
Fieseler Fi 5
Göppingen Gö 9
Klemm Kl 25
Klemm Kl 35
Klemm Kl 107
Shackleton-Murray SM.1

 

Specifications:

HM 60R2
Type: 4-cylinder air-cooled inverted inline engine.
Bore: 102 mm (4 in)
Stroke: 110 mm (4.33 in)
Displacement: 3.6 L (220 cu in)
Length: 856 mm (33.7 in)
Width: 391 mm (15.4 in)
Height: 688 mm (27.1 in)
Dry weight: 97 kg (214 lb)
Valvetrain: 1 inlet and 1 exhaust valve per cylinder.
Fuel system: Carburetor
Fuel type: 74 octane
Cooling system: Air-cooled
Power output: 80 hp (60 kW) at 2,400 rpm
Compression ratio: 5.8:1
Power-to-weight ratio: 0.3 hp/lb (507 W/kg) at cruise speed

 

 


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