Products / Hirth Engines / 35 Series

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

Hirth Engines / 35 Series

35 Series

Gasoline or heavy fuel liquid-cooled UAV engines with 70HP output

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35 Series

With liquid cooling and exceptional durability, the 35 Series offers the maximum possible power-to-weight ratio available on the 70-horsepower market. It can be optionally equipped with dual ignition, an electric starter, and separate lubrication system.

A heavy-fuel variant, the 35HF, is available to suit the requirements of maritime applications and defense forces. Running on kerosene-based fuels such as Jet A, Jet A1, JP5 and JP8, it can also be equipped with a starter/generator delivering up to 3kW at 28V.

Specifications:

Dimensions (L x W x H): 35: 472 x 410 x 360 mm (18.58 x 16.14 x 14.17”)
35HF: 481.8 x 453 x 443 mm (18.97 x 17.83 x 147.44”)
Weight: 36 kg (79 lb) with exhaust and water in the engine
Displacement: 625 cm3 (38.1 cu in)
Stroke: 69 mm (2.72 in)
Bore: 76 mm (2.99 in)
Max Performance: 44 kW (60 HP) at 5200 rpm
According to DIN 70020
Specification with 194°F coolant
Max Torque: 35: 84 Nm (62 ft.lb) at 5000 rpm
35HF: 67.5 Nm (57.0 ft.lb) at 6000 rpm

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