Universal Hydrogen's modified Dash 8 incorporates the hydrogen fuel cell propulsion system in place of the Pratt & Whitney PW123 turboprop on its right wing.
Zero-emission propulsion developer ZeroAvia has partnered with UAE renewable energy company Masdar to explore the production and supply of green hydrogen.
Remaining regional aircraft OEMs ATR and Embraer continue to wait for fresh, strong demand. If the hesitation is structural, the outlook could stay grim.