MaximumEd
Well-Known Member
I’m curious about the train exhaust, too. What exactly is it? I’m no expert but steam alone doesn’t leave dark marks. Only Voldemort or pollution can do that.
The steam that drives the pistons that drive the wheels is exhausted up the smokestack, which also creates draft for the firebox. These run on diesel, not coal, so what comes out of the stack is a mixture of steam and diesel slobber. Diesel slobber being a technical term, naturally.