The typical steam locomotive employs a steel fire-tube boiler that contains pressurized water and steam. A firebox is normally located in the rear of the boiler (chimney in front). The firebox has a water filled steel chamber surrounding the top and sides of the flame in the firebox. If wood or coal is used to make the fire in the firebox it is built on a set of grates where ashes may be separated from the burning fuel.
Why this is interesting…so interesting in fact that I have the dire need to point out it’s flaws.
Your face is flawed.
Of course it is flawed. Our faces are not symetrical. Even with your head’s round, obtuse shape and splotchy complexion there is not much asthetic balance to it. Nothing is perfect. However, do tell me why you fancy trains so much. Is it because of your design?