Y4: Doug Hewson Drawing Set

Doug Hewson drawings showing;

1. General arrangement 
2. Frames, wheels and brakes
3. Cylinders, rods and motion brackets
4. valve gear and brake cylinder
5. Boiler, super heaters, regulator and manifold
6. Smokebox, Ashpan, Fire Grate, buffers and regulator handle
7. Tanks, cab, sanders and drain cock linkage
8. Platforms, lubricators, safety valves, brake valve and linkage
9. Backhead fittings and drain cock cross shaft