Home
Now available with generator options.
UAV Engines, Propulsion Systems & Accessories
HFE International designs and manufactures heavy-fuel and multi-fuel propulsion systems for UAVs and unmanned platforms. From our facility in Tucson, Arizona, we build EFI UAV engines, GenPod field-swappable propulsion units, Wankel rotary engines, power management systems and the ground support equipment that keeps them flying.
We are AS9100D and ISO 9001:2015 certified, and we supply UAV manufacturers, aerospace integrators, defense contractors and government customers worldwide, including the United States and Canadian Armed Forces. Founded in 2010, HFE has produced over 2,000 propulsion systems now in service across 28 countries.
UAV ENGINES & PROPULSION SYSTEMS
Shop EFI, MIL SPEC, DA Engines and More
Our DA series of EFI conversions runs from the DA-35 at 2.8 hp to the DA-215 at 14.9 hp, alongside MIL-SPEC variants tested to MIL-STD-810 and AIE Wankel rotary engines from 5 to 120 bhp for heavy-fuel operation. EFI gives reliable high-altitude starting, consistent fuel mapping and lower fuel burn than a carbureted engine of the same displacement. Starter alternator options are available across the range.
-
-
Select options This product has multiple variants. The options may be chosen on the product pageAll Engines, Mil Spec EFI EnginesDA 100 EFI MIL SPEC UAV Engine
Price range: $23,017.50 through $26,023.46 -
Select options This product has multiple variants. The options may be chosen on the product page
VOLZ SERVOS & ACTUATORS
Shop high-performance servos from Volz
We supply the full Volz servo line, built by a German manufacturer with more than 40 years in actuator development and qualified against the engines and airframes we support. Every servo is specified for the job it does rather than picked from a catalog, so you are not matching part numbers across suppliers. Contact us for sizing help on a new integration.
ELECTRONICS, SENSORS & POWER MANAGEMENT
Shop ECMs, PMUs, Temperature Sensors and more.
Our electronics range runs from the HFE ECM Lite to the Currawong Mil Spec ECM, which adds MIL-STD-810 testing, cold start to -40 C and EMI shielding. Alongside them we stock power management units, cylinder head temperature sensors, Currawong ESCs, solder cup connectors and wire harnesses, each specified against the engine it serves.
TRENDING PRODUCTS
Shop new arrivals and customer favorites.
Frequently Asked Questions About UAV Engines
A heavy-fuel engine runs on kerosene-based fuels such as JP-8, JP-5 or Jet A rather than gasoline. Military operators favor them because a single fuel supply serves aircraft, vehicles and generators, and because heavy fuels are far safer to store and handle aboard ship.
HFE International designs and manufactures heavy-fuel and multi-fuel propulsion systems for unmanned aircraft. The range covers EFI UAV engines, MIL-SPEC engines, GenPod field-swappable propulsion units, Wankel rotary engines, power management systems, servos, sensors and UAV ground support equipment.
Electronic fuel injection meters fuel electronically against engine and air data, where a carburetor relies on airflow through a fixed jet. EFI starts and runs reliably across altitude and temperature swings without manual adjustment, holds a more consistent air-fuel ratio, and typically burns less fuel for the same power.
A GenPod is a complete line-replaceable propulsion unit from HFE International, combining engine, mounts, fuel system, ignition and generator in one sealed assembly. A field crew swaps the entire pod instead of repairing an engine on the flight line. GenPod is available in 70, 100, 120 and 150 configurations.
Yes. HFE International is a business-to-business supplier to UAV manufacturers, aerospace integrators, defense contractors and government agencies worldwide, including the United States and Canadian Armed Forces. We hold AS9100D and ISO 9001:2015 certification.
HFE International is based at 8060 E. Research Ct., #170, Tucson, AZ 85710, in a 10,000 sq ft facility with an 8,000 sq ft production area. Engines are designed, built and overhauled there. The team is reachable on +1 (520) 578-0818 or at contactus@hfe.aero, Monday to Friday, 9:00AM to 5:00PM Mountain Time.
The DA series of EFI UAV engines runs from the DA-35 through the DA-50, DA-70, DA-100, DA-120, DA-150 and DA-215, covering 2.8 to 14.9 hp. MIL-SPEC variants and AIE Wankel rotary engines are also available, the rotary range running from 5 to 120 bhp for heavy-fuel operation, with starter alternator options across most of the range.