A couple of my favorite engines have to be the Beam type and a Triple Expansion marine style. I have built several beam engines over my career but never a Triple so using the Stuart Compound Launch engine as a starting point I began designing my own. I used the Stuart dimensions for the H.P. and I.P. cylinders then using the size ratio of these 2 I calculated the dimension for the L.P. cylinder. Once I had these sizes I started drawing but at .1/2 scale.
The cylinders, valve chests and covers are made from cast iron. The heads and other steel parts are made from 1144 steel. The shafts and stanchions are made from Stainless Steel. All the brass parts are made from 360 brass. The majority of the small bolts are M1.2x.25 (that's .047 diameter with a .078 hex.
gbritnell
The cylinders, valve chests and covers are made from cast iron. The heads and other steel parts are made from 1144 steel. The shafts and stanchions are made from Stainless Steel. All the brass parts are made from 360 brass. The majority of the small bolts are M1.2x.25 (that's .047 diameter with a .078 hex.
gbritnell
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