Thanks Guys
Arnold the loco has coal storage in a bunker just behind the driver in the second photo, smaller engines were used for shunting and industrial work around doc yards, coal mines, steel works etc so they were never far away from a supply of coal and water, and didn't need to haul there own supply.
What interested me was the valve linkage it looked like Stevenson outside system driven off the back wheels with a rod running the full length of the loco to the slide valves on the cylinders its very unusual to me I've not seen that system before no doubt it has a name but its unknown to me.
As for the crane tank I was wondering if you could use the Tich design to base a model on, at 3 1/2" gauge Tich to my eyes is a bit on the small size but there are plenty of 5" gauge Tiches running about and that would be a better size to base it on, and you would have more room to get the crane gear in.
NO No No
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Repeat after me
I must complete my other projects first
:D :D :D :D :D
Stew