If I can ever get the software to let me move this image to the top it should be the first picture. 2 years of research went into producing a CAD drawing of a Millers no 3 Chilled iron tram wheel. This drawing was delivered to H Downs and son at Huddersfield who contracted out the pattern making to Gerald at Heritage Patterns in Meltham. here the pattern is shown part made. It is built up of layers of plywood laminated together then turned to the correct profile on a lathe.