Quote Originally Posted by 34_40 View Post
They exhaust the steam into the stack as it creates draft, the speed of the steam leaving creates a low pressure inside the boiler, drawing in more air.

A "supercharger" if you will but, in reverse. LOL...

I enjoy your ramblings because you can describe what you see so that I can understand and appreciate the vision... and I'll admit I'm a bit jealous that I can't get there myself... YET! LOL..
Thanks mate. So my assumption was correct.
But you put it far more succinctly than I did.

And you'll get there yourself one day, you've got youth on your side.
To quote my Granddad: "You young fellas of today don't know what hard times are! Why, when I was your age we were so broke we had to use both sides of the toilet paper!"