Hirth Engines stands as a premier innovator in the realm of advanced two-stroke engines tailored for uavs (unmanned aerial vehicles). With a legacy spanning over 90 years in aviation and three decades dedicated to the drone sector, we are devoted to delivering optimal propulsion solutions while leading the charge in engine technology advancements.
Our engines have been integrated into a diverse array of UAV platforms globally, such as:
- V-200 (UMS Skeldar)
- V-BAT 118 (Shield AI)
- BAT12 (Northrop Grumman)
- Luna (Rheinmetall)
- AWHERO 150 (Leonardo)
Discover more: Hirth UAV Engines
Innovative Two-Stroke Engine Solutions for UAVs
Our cutting-edge two-stroke engines are designed to deliver extraordinary power-to-weight ratios alongside minimal fuel consumption, making them perfectly suited for unmanned aerial operations.
Our engines are meticulously crafted by a team of seasoned professionals at our research and development facility located near Stuttgart, germany. Each component, whether produced in-house or sourced from trusted partners, undergoes stringent testing protocols.
We have engineered a proprietary electronic direct injection system that enhances fuel efficiency and ensures smooth operation, along with various other advantages for UAV applications, including:
- Fuel optimization based on altitude and environmental conditions
- Customizable fuel-air mixtures to meet specific operational needs
- Reduced CO2 emissions through lean mixture settings
- Enhanced mixture formation for cold and hot starts
- Minimized smoke during startup and warm-up phases
- Automatic speed control via fuel injection interruption, preventing misfires
- Tailored engine management systems that integrate seamlessly with existing UAV control and communication networks
We provide both gasoline and heavy fuel engines for UAVs, catering to commercial, military, and maritime sectors. Each base engine can be customized to create tailored solutions that fulfill your specific UAV propulsion requirements.
Specialized Two-Stroke Engines for UAV Applications
23 Series
The air-cooled 23 Series is designed for UAVs with a maximum weight of 120 kg, delivering 50 HP with an exceptional power-to-weight ratio. Built for reliability, it boasts a 1000-hour time between overhauls (TBO) and can be outfitted with various options, including dual ignition, fuel injection, and an electric starter.
32 Series
Delivering 65HP with a leading power-to-weight ratio, the 32 Series of air-cooled engines is perfect for UAV platforms with weight constraints. It offers a 1000-hour TBO at 75% power, ensuring your design is equipped to handle future unmanned aviation challenges.
33 Series
Weighing only 12.7 kg and producing 30HP, the air-cooled 33 series is an excellent option for smaller UAVs. It can be equipped with dual ignition and configured to generate 50W of power for auxiliary needs.
35 Series
Featuring liquid cooling and remarkable durability, the 35 Series provides the highest power-to-weight ratio available in the 70-horsepower category. It can be equipped with dual ignition, an electric starter, and a separate lubrication system for enhanced performance.
A heavy-fuel variant, the 35HF, is also available to meet the demands of maritime and defense applications.
41 series
Built on a proven design that has successfully completed over 20,000 missions in challenging environments, the air-cooled 41 Series showcases the latest advancements in two-stroke UAV engine technology.It employs sophisticated closed-loop control and automatic altitude and temperature adjustments, delivering up to 8.1 HP at 6700 rpm for reliable performance in extreme conditions.
42 Series
Similar to the 41 Series, the air-cooled 42 Series features advanced closed-loop control and automatic altitude and temperature compensation for optimal performance in any habitat. It produces up to 15HP at 6500 rpm and can be equipped with oil injection, various reduction drive options, and starter/generator capabilities of up to 1 kW.
A heavy-fuel variant,the 42HF, is also available to meet the needs of maritime and defense sectors.
