We take a present subsonic jet, and when it is up in the air, we turn on a water feed. On the jet exhaust, there is a ring of Venturi nozzles – these use the rush of high pressure gas to create suction.
At the point of turning from liquid to vapour, we do Molecular Nuclear Fusion
This is why a present jet engine gives off X-rays, as the combustion products, including steam in turbulent flow, does Molecular Nuclear Fusion. So a present jet engine does nuclear fusion.
Now though, the water droplets we suck in, meet the jet exhaust at 1,400oC. Jets used to be titanium, but now they use Nimonics.
Jet turbines lay in the power range of ceramics, and this would allow the engine to run at 1,800oC – with a resulting increase in drive,
This is incidental, as the boiling water should take us up to 1,600oC – with the present turbines: the temperature is generated outside the engine.
This is going to take us up to Mach 8. Using a present jet. We might want to look at using Ti plane panels, to prevent them melting – as we are outside the temperature range for Al alloy.
So we are going to reduce the transatlantic time from 10 hours, to under 2½. We turn off the water to land as normal.
We decrease the carbon footprint to cross the Atlantic by a fact of 4: but I keep telling you, plants turn extra CO2 into extra biomass, over the land and seas.
Man CAN'T increase the 2 parts per million CO2 left in the air by photosynthesis. The Cretaceous mass extinction happened as CO2 levels FELL to 1ppm. Life only recovered as animals evolved to metabolise plant biomass, with the oxygen they excrete.