A little preview: After all, in World War I, not just the men had guts...the ships did too....
BTW, If you were torpedoed, you had better hope the engineer room crew managed to shut those doors. If not, the boilers could literally be blown out of the ship foundations-along with anything in their path.
Then they'd have seconds to find a rope or ladder out of the engine room, in the dark, with rising water, before the lifeboats left. The merchant marine in WWI and WWII were heroes, but stokers were heroes among heroes. The tradition remains today...when the "Marine Electric" sank recently, her engine crew stayed below to secure everything, giving their lives so the other crew could escape.
I looked at various plans and found that the boilers from "Titanic" are a good stand-in for many boilers of the era - civilian and military. This is not an exact copy, of course, to save on computer rendering and time. Bolts at the top of the boiler face aren't included because they will be covered by the uptakes, so there's no point modeling them.
I am going to see if I can use Silent 3ditor to prevent rendering boilers/interior parts at long distances. At close range, boilers will be visible if you blast a hole in the engine room, if a ship has a structural failure, or there is a catastrophic explosion.
Next step will be skinning and adding particle effects (steam for damage, and possibly a unique explosion graphic for when damage reaches 100%).