donjohnston
Pattern Altitude
If their previous track record is any indication, we'll see this in 2050.
generalaviationnews.com
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DeltaHawk launches hydrogen engine development program — General Aviation News
"These tests have demonstrated DeltaHawk’s highly adaptable engine architecture is suitable for hydrogen fuel, and that the company’s patented engine design has applications in a variety of markets in addition to aviation, including zero emission vehicles (ZEV), other commercial power...
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