The 23 Series is an air cooled two-stroke engine that makes an excellent choice for light aviation devices weighing up to 120kg.
Sets world-class standards in its power-to-weight ratio for the 50-horsepower market achieving performance and reliability unmatched in the industry.

This engine series offer a time between overhauls of 1000 hours and is fit to take on any challenge in the future.

-50 HP
-Air Cooled
-2-Stroke
-World standard power-to-weight ratio
-Fit to take on any challenge in light aviation

The 32 Series air cooled two-stroke engines offer the highest power-to-weight ratios available in the 65-horsepower market.
Ideally suited for use in light and ultralight aviation, hovercraft, gyro and helicopters and all applications where weight could be an issue.

This engine series offer a time between overhauls of 1000 hours at 75% power and is fit to take on any challenge in the future.

-65 HP
-Air Cooled
-2-Stroke
-Ultimate power to weight ratio
-Ideal for light aviation, hovercraft, gyro or helicopters

The 33 Series air cooled two-stroke engines offer the ultimate power-to-weight ratios available in the 30-horsepower market.
Makes the best choice for use in light and ultralight aviation, powered parachutes and all applications where weight could be an issue.

This engine series offer a time between overhauls of 1000 hours at 75% power and is fit to take on any challenge in the future.

-30 HP
-Air Cooled
-2-Stroke
-Light weight
-Best suited for light aviation and powered parachutes

The 35 Series liquid cooled two-stroke engines offer the maximum power-to-weight ratios available in the 70-horsepower market.
Offers an ideal choice for use in light and ultralight aviation, hovercraft, gyro and helicopters and all applications where weight could be an issue.

This engine series offer a time between overhauls of 1000 hours at 75% power and is fit to take on any challenge in the future.

-70 HP
-Liquid Cooled
-2-Stroke
-Highest power to weight ratio
-Perfect for light aviation, hovercraft, gyro or helicopters

The 35 HF is a water cooled, reed valve controlled 2-cylinder-inline-2-stroke engine with air assisted direct injection.
This liquid cooled 2-stroke powerhouse offers maximum power-to-weight ratio and extreme operational range in all conditions. The 3504 HF is Heavy Fuel ready and NATO compliant, providing a superior propulsion system for maritime, military and civilian machines.

Recognised for its exceptional performance and durability, the 35HF offers a time between overhauls of 1000 hours.

-60 HP
-2-Stroke
-Liquid Cooled
-Heavy Fuel
-Maximum Performance in Extreme Conditions
-Highest Power-to-Weight Ratio
-NATO Compliant

The 41 Series air cooled two-stroke engines utilise advanced closed-loop control, optimising performance for extreme environmental conditions.
Based on the world-renowned 4103 engine – which has flown more than 20,000 missions in theatre across the globe – the new 41 Series has been updated with the latest in engine technology providing a top shelf propulsion system that meets the demanding requirements of the unmanned aerial vehicle (UAV) market.

This engine series features automatic altitude and temperature compensation allowing reliable start and operation in a wide operating range.

-2-Stroke
-Air Cooled
-Exceptional reliability
-Latest unmanned aerial vehicle (UAV) technology
-Maximum performance in extreme conditions

The 42 Series air cooled two-stroke engines utilise advanced closed-loop control, optimising performance for extreme environmental conditions.
Based on the well-known S1211 and S1212 engines – which have been proven in theatre – the new 42 Series have been updated with the latest in engine technology providing a top shelf propulsion system that meets the demanding requirements of the unmanned aerial vehicle (UAV) market.

This engine series features automatic altitude and temperature compensation allowing reliable start and operation in a wide operating range.

-2-Stroke
-Air Cooled
-State-of-the-art engine technology
-Best performance for unmanned aerial vehicles (UAV)
-Ultimate control in extreme conditions

The 42 Series air cooled two-stroke engines utilise advanced closed-loop control, optimising performance for extreme environmental conditions.
The newest 4202 Heavy Fuel Engine of Hirth in the 13hp class offers the best power to weight ratio and performance on the top for your system. Our JET-A1 Engine Series prove their reliability over the last couple of months in several endurance test.

High TBO and low maintenance efforts characterize this engine type with roots based on the well-known 4201 gasoline engine.

-2-Stroke
-Air Cooled
-State-of-the-Art Engine Technology
-Best Performance for Unmanned Aerial Vehicles (UAV)
-Ultimate Control in Extreme Conditions
-Starter-Generator-System