At the Henry Ford museum near Detroit I saw a small engine that was powered by home water pressure; I believe it powered a washing machine although I may be mistaken about that.
I'm estimating that the grasshopper haulage engine's cylinder is about 3' high with a 6' diameter flywheel. I'm trying to decide what scale my Muncaster should be in order for any brickwork to look correct. Dollhouse brick is 1:12, so if I use that my engine's putative prototype would have an 11' flywheel. My alternative, that I'll experiment with, is to make brickwork myself via engraving on aluminum with orange powdercoat; that can me made to any scale.
Is there any historical info on how large this type of engine could be?