Japanese authors and physics
"Physics? Is it sparkly? Is it tasty?"
Ikaruga turned its thrusters to the weapon and started moving so fast that a steam of flames didn't hurt it.
OMFG LOL 🤣
Physics prep school graduate in me is crying tears of blood.
How fast is "so fast"? Mach 5? 1M? 0.5M?
We know it's a steam of "flames" and we heard nothing about fuel so the weapon got to have a huge air intake for super-heated air. Well not so super heated as it's RED, making an intake even larger, cause less energy injected.
Why author thinks that moving inside the steam of flames will make any difference? IMO it will make it worse, as you'd add that steam's matter's resistance to ambient heating.
So yeah, author was better of writing "It spewed the dense steam of mana at it" and be done instead of inventing half-assed "explanations".