Hirth HM 60

HM 60

Type	Inline piston engine
Manufacturer	Hirth
First run	June 1923
Major applications	Klemm Kl 25

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. 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.^[1]

Variants

HM60
HM60R
HM60R2

Applications

Specifications (HM 60R2)

General characteristics

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)

Components

Valvetrain: 1 inlet and 1 exhaust valve per cylinder.
Fuel system: Carburetor
Fuel type: 74 octane
Cooling system: Air-cooled

Performance

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

References

Notes

↑ Gunston 1989, p.77.

Bibliography

Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9

External links

Wikimedia Commons has media related to Hirth HM 60.

Oldengine.org

Hirth and Heinkel-Hirth aircraft engines

Piston engines	HM 8 HM 60 HM 150 HM 500 HM 501 HM 504 HM 506 HM 508 HM 512 HM 515

Two-strokes	F-23 F-30 F-33 F-36 F-263 2702 2703 2704 2706 3002 3003 3202 3203 3502 3503 3701 3702 3703

Gas turbines	HeS 1 HeS 3 HeS 8 HeS 30 HeS 40 HeS 50 HeS 60 HeS 011

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