Are proper trainbusting effects possible?

[Pursuivant]

Originally Posted by dimlee

Agree on critical hit by a bomb. Not sure about a rocket, even AP.

A big rocket basically has the same punch as a small bomb or an artillery shell - certainly enough power to potentially cause a boiler explosion.

Originally Posted by dimlee

20mm shells - certainly not, unless ship's hull and deck is pure wood or this is very small vessel as tug boat, for example.

That's what I was thinking of. If you look at gun camera films, you can sometimes see 20mm and .50 caliber AP rounds damaging small ships like frigates, destroyer escorts, tugs, and coastal freighters. They didn't call destroyers "tin cans" for nothing!

Originally Posted by dimlee

It would be interesting to speculate how often this effect should be triggered, taking into account size of a bolier. Probably just few percent of all hits in some "box" representing the engine room.

I'd say "rarely" - perhaps no more than 10% of the time. That is, assuming that IL2 ever revises the ship damage model to actually take hit locations into account. It could also be triggered as a fatal damage effect when a ship sinks.