Aye, maybe...But wouldn't exposing the same fire to an
excess amount of air at high speed and pressure blow out the flames?
If nothing else, it'd certainly be a fun thing to try just for the thrill of coasting down Beattock at => 250mph!
Ah...Now I agree that can be a bit of a problem. I've never worked on railway traction motors before, but the first alternator that I had in my Volvo (Similar to a DC motor, but works t'other way around) siezed due to foreign object debris (FOJ) between the rotor and the stator.
I managed to fix it quickly though by simply taking a long and hefty wrench and using it to spin the rotor with enough force to crush the FOJ to dust!