The modified R44 has a hydrogen tank under the tailboom and two cooling nacelles on either side of the cabin.
Credit: Unither Bioelectronics
The first flight of a hydrogen-powered helicopter has been accomplished in Canada by Unither Bioelectronics. A subsidiary of bioetechnology company United Therapeutics (UT), Unither modified the piston-powered Robinson R44 to hydrogen-electric propulsion using a fuel cell power system. The first...
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