On Jan 16, 2021, at 19:15, Charles Peck <firstname.lastname@example.org> wrote:
One end might resemble a single furnace Scotch Marine but with the furnace not coming out the other end, I cannot see it being a good anything at all. Not that I have seen every possible boiler but it does not look good to me.Good catch. The tubes coming out beside and below the furnace are also suspect. Then there's the length - Scotch boilers don't seem to be that long compared to their diameter. I recommend a web search of the vast horde of engineering texts available describing stationary and marine boilers and either kit bashing or scratch building something.
I have some books from Model and Allied Publications, publisher of Model Engineer Magazine, describing the design and construction of working miniatures
 now Argus Press, Hemel Hempstead, Herts., UK - Martin Evans and K. N. Harris come to mind as authors
Model Locomotive and Marine Boilers, a copy available for $28 US from Abe books via bookfinder.com, searching with Martin Evans in the Author field and Boilers in the title field
"He sold his earthright for a pot of message."