Trouble is you can't just make a pattern from an original, Steel shrinks (unlike Cast iron) so your end casting would be a scaled down version of what you started with! The pattern maker scales up the original when he makes the wooden / resin pattern to compensate for the shrinkage. Certain items can be mouled from an original, then the moulder can 'scrape' the sand to compensate for the srinkage. A few years ago Dad did a Model T wing support in steel using an original pushed into the sand, all it needed was a couple of cm adding to its length to allow for the change in size. Obviously the entire thing was a little smaller but it was only critical on the length.
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Alastair
Lincoln, UK.
Under Restoration:
1944 No2 MK2 Loyd Carrier - Tracked Towing
1944 Ford WOT6 Lorry
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