You lose 2 seats on either side of the jet, given over to water tanks. Once the jet is up, you start pumping liquid water into a porous exhaust manifold, and we get steam at 10 atmospheres. We introduce this to the combustion gases before they enter the engine.
My experience with steam turbines 1984, tells me we do Molecular Nuclear Fusion
So we get so much heat – we keep boiling off more water. We can turn the aviation fuel down, until we are langing.
So we see jet engines are fusion devices. I would replace the nickel turbine blades, with ceramic ones, coated with TiO. So we run the engine at 3,000oC – the planes travels at mach 10.