We can work the details out, using an air fan linked to a toy jet engine. We turn on the air, as if we were flying at 500 mph.
In the middle of the jet engin we have a Venturi nzzel, so as we turn no the water it boils. This does boilig Molecular Nuclear Fusion
1 H2O+TU ->2He++O2++4e-+E2+X-ray.
We then get a ribbon of steam plasma – this does 100 times more Molecular Nuclear Fusion
2 H++e- ->n0 these neutrons bond with the other ions
3 16O2+ +s n0 ->8H++6e-
4 H++r n0 ->Er3+L+X-ray
We have a ribbon of star meterial streaking out of our jet. Suface temperatur e10 millonoC. Bulk gas temperature 3000oC. Hence the importance of the air jet.
We boil of water, and use this steam in place of combustion products.
So we can modify a small jet, to fly at Mach 8 off regular water. We do need thermal tiles to prevent the front of the jet melting.