#6161
Dr_Barnowl
Participant

You seem to have misunderstood something. since what i am trying to describe is basically a form of afterburner for the DPF

Energy is conserved – you can’t buy additional kinetic energy by adding inert mass. Afterburners only work because the mass that’s added to the exhaust stream is more fuel, which combusts, adding energy and mass to the exhaust gases, causing greater expansion of the gases and higher exhaust velocity.

You may be able to increase momentary thrust (by releasing superheated bursts of inert propellant), but you now have a much, much, much, larger propellant tank to haul, you lost energy in the preheat chamber due to thermal leakage, and the average thrust you’ll manage will be less than just venting the ion stream out of the back.