EVERETT, WA (March 25, 2025) — ZeroAvia has been awarded an AFWERX Small Business Innovation Research (SBIR) grant to study the integration of hydrogen-electric propulsion systems with autonomous flight technology in Cessna Caravan aircraft. The project addresses specific research priorities identified by the Department of the Air Force (DAF).
Hydrogen-Electric UAV Development
The feasibility study will explore creating an 8,000 lb autonomous aircraft with hydrogen-electric propulsion that offers:
- Reduced engine noise and low thermal signature for decreased detectability
- Improved range and flight duration compared to conventional electric UAVs
- Faster turnaround times between missions
Key Hydrogen Advantages for Military Applications
Hydrogen provides several strategic benefits as an aviation fuel:
- On-site production capability using electricity and water, simplifying logistics for defense operations
- Highest energy-to-weight ratio of any chemical energy source
- Potential maximum range exceeding 2,000 nautical miles (nearly 4,000 km) for this aircraft class
California-based Reliable Robotics will collaborate with ZeroAvia to investigate applicable autonomous flight systems throughout the study.
Advancing Defense Innovation
The DAF’s Open Topic SBIR/STTR program, launched in 2018, expanded the scope of defense-funded innovations. ZeroAvia’s participation supports U.S. national defense capabilities through the strategic integration of autonomy and fuel cell technologies.
Commercial Aviation Progress
ZeroAvia is currently advancing its ZA600 powertrain—a 600kW hydrogen-electric system that converts hydrogen to electricity via fuel cells to drive electric motors—through civil aviation certification. The company recently achieved a significant regulatory milestone with the FAA’s issuance of a G-1 issue paper for this electric propulsion system.
The Cessna Caravan, manufactured by Textron, is the initial targeted airframe for both commercial and potential military applications.
Did You Know? Airbus ZeroE Hydrogen Aircraft Redesigned with Four Engines
