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EFI, Mil-Spec & Rotary UAV Engines / UAV Servos Actuators / Fuel System Parts

HFE International LLC Visit Website

HFE International is a leading manufacturer and developer of high-reliability fuel injection engines, rotary engines and ground support equipment for drones and UAVs (unmanned aerial vehicles).

Our gasoline and multi/heavy fuel unmanned propulsion solutions are ideal for a wide variety of small UAVs, and are used throughout the world by the U.S. Armed Forces and other high-profile customers. As proof of our ongoing commitment to quality, we are ISO 9001:2015 certified and continually strive to improve customer satisfaction through our superior-quality products and engineering services.

DA70 GenPod – UAV Engine

Easily field-swappable engine for UAVs

HFE DA70 GenPod - UAV EngineThe DA70 GenPod is an easily field-swappable UAV engine that dramatically reduces operational downtime. The entire system, including electronics, fuel pumping system, EFI, ignition, and motor mount isolation, can be removed by simply flipping two clips, saving significant time and costs during scheduled maintenance.

The DA70 GenPod can be integrated into new UAV designs with a minimum of effort, requiring only a power supply, fuel tank connection and throttle position signal. The built-in starter requires only a 5V signal, providing up to 500 W of electrical power for the avionics system and featuring integrated power management.

All GenPod engines include a silent muffler set that reduces acoustic signature and acoustic non-detectability altitude. The unit is available in pusher or tractor configuration, and different cowling options are available upon request.

Inquire about the DA70 GenPod > 

EFI UAV Engines

Highly efficient, fuel injected engines for UAVs

HFE DA35 UAV engineThe DA series of UAV engines features state-of-the-art fuel injection technology for high-efficiency operation, and a special magnet configuration in the propeller hub for easy starting. The built-in engine control module (ECM) can be powered by a single 3-cell Lipo battery of capacity 1500mah or greater, with a total power draw of only 12 watts (1 amp) at full throttle.

All DA UAV engines have been tested from sea level to 10,000 ft altitude, and at temperatures ranging from 10°F to 120°F

HFE DA50 EFI UAV engine


HFE DA70 EFI UAV engine


HFE DA100 EFI UAV engine


HFE DA120 EFI UAV engine


HFE DA150 EFI UAV engine


HFE DA170 EFI UAV engine


Comparison & Specifications:

PowerRPM Range
DA352.2 kW (3 HP)2000 – 8000 RPM
DA503.5 kW (4.5 HP)2000 – 8000 RPM
DA704.2 kW (5.6 HP)2000 – 7000 RPM
DA1005.5 kW (7.3 HP)1500 – 7000 RPM
DA1206.8 kW (9.2 HP)1500 – 6800 RPM
DA1507.8 kW (10.5 HP)1500 – 7000 RPM
DA1709.5 kW (13 HP)1800 – 6500 RPM

View our range of EFI UAV Engines > 

HFE DA35 Mil-Spec UAV engineMil-Spec UAV Engines

MIL-STD-810 tested EFI engines for UAVs

HFE International offers mil-spec versions of its DA series of UAV engines, featuring a state-of-the-art fuel injection system that has been in real-world service on over 700 aircraft and has flown more than 67,000 hours in a wide range of environments around the world.

All mil-spec DA UAV engines have been tested to MIL-STD-810, at altitudes up to 20,000 ft and at temperatures ranging from -10°F to 120°F.

HFE DA50 EFI Mil-Spec UAV engine

DA50 Mil-Spec

HFE DA70 Mil-Spec UAV engine

DA70 Mil-Spec

HFE DA100 Mil-Spec UAV engine

DA100 Mil-Spec

HFE DA120 Mil-Spec UAV engine

DA120 Mil-Spec

HFE DA150 Mil-Spec UAV engine

DA150 Mil-Spec

HFE DA170 Mil-Spec UAV engine