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Retrofit
Hydrogen-electric propulsion system for Bonanza airframe retrofit
Stralis are currently testing their hydrogen electric propulsion system (HEPS) with two Bonanza A36 aircraft. The test program is underway and Stralis have completed a successful propellor spin using hydrogen at Brisbane International Airport in 2024, and the first hydrogen test flight is planned for Q3 2025.
Hydrogen-electric outperforms battery and fossil fuel aircraft on payload range. Competing hydrogen-electric developers use low-temperature fuel cells, which are mature but too heavy, limiting range and payload capabilities. The Stralis hydrogen-electric propulsion system uses high-temperature PEM fuel cells which are 6X lighter and have improved performance.
Estimated 60% reduction in engine maintenance costs compared to turbines.
Low fuel costs compared to fuels currently used in turbine engines.
Unlike battery-electric, HEP delivers ranges suitable for commercial, regional routes.
Quieter, emission-free flight with zero carbon dioxide, nitric oxide or soot.
Bonanza A36-HE Retrofit Payload Range. Current Hydrogen-Electric vs. Battery vs. Fossil Fuel vs. Stralis Hydrogen-Electric
We integrate our proprietary fuel cell system, liquid hydrogen tanks and electric motors into aircraft, starting with our iconic Bonanza-A36-HE. Our Hydrogen Electric Propulsion System can provide an upgrade for battery-electric aircraft, can replace conventional engines, and can be incorporated into new aircraft designs.
Learn more about why hydrogen
Stralis are seeking expressions of interest from the Bonanza community, for upgrades of aircraft worldwide using our proprietary hydrogen-electric propulsion system.
Register your interest›
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Follow the journey of our test aircraft, ahead of our first product launch.