Gunner Asch wrote:

Sounds like a winner for hydrogen fuel..it could use the water formed
as the injectible water.....

True - you could approach 100% recovery from H2/O2 exhaust. I think
that some or all the hydrogen burning engines burn some nitrogen,
though.

Even with hydrocarbon fuels you could reclaim a lot of water from
the exhaust. Something tells me that you've had occasion to run a gas
or propane heater in an enclosed area before. Lots of water appears.


R,
Tom Q.