Products / Hirth Engines / 41 Series

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Cutting-Edge Two-Stroke Gasoline & Heavy Fuel Engines for Unmanned Aerial Vehicles

Hirth Engines / 41 Series

41 Series

Air-cooled 8.1HP two-stroke engines with automatic altitude & temperature compensation

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41 Series

Based on a proven design that has flown over 20,000 real-world missions in the most demanding environments, the air-cooled 41 Series offers the latest in two-stroke UAV engine technology. Utilizing advanced closed-loop control and automatic altitude and temperature compensation, it delivers up to 8.1 HP at 6700 rpm and ensures ultra-reliable starting and performance under a wide range of harsh environmental conditions.

41 Series engines can be equipped with a variety of options, including a starter/generator delivering up to 1kW, two exhaust styles, and an oil injection system.

Specifications:

Dimensions (L x W x H): 259 x 286 x 308 mm (10.2 x 11.25 x 12.12”)
Weight: 3400g (7.5 lb) with exhaust system, sensors and wiring harness
600g (1.33 lb) additional subcomponents (ECU, ignition system, fuel supply etc)
Displacement: 100 cm3 (6.3 cu in)
Stroke: 34 mm (1.34 in)
Bore: 44 mm (1.73 in)
Max Performance: 6 kW (8.1 HP) at 6700 rpm
According to DIN 70020

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