Tom Mallard
Western Thunderer
After a slow patch with too many things to think about getting in the way, much of the unexpectedly time consuming pipe runs for the vacuum pipe and steam heat pipework have been installed. They are really a case of artistic metalworking, as even if there were a drawing, forming such an irregular shape is a challenge. The elbow joints are built up from mitred sleeves on the vacuum pipe. The carriage warming pipe was harder to replicated as the lagging is modelled. This is brass foil strips wound around the rod of a diameter large enough to imply the right thickness of lagging. Elbows are made of rod and pinned to the long pieces.
The swan necks are built up from wire and turnings as required. To get the sharp bend in the top, the material is annealed and worked overlength. A cut is made halfway through on the inside of the bend and then closed up, with the process repeated until the correct form was achieved. The curve can be manipulated and improved using pieces of rod with a close fitting hole and a beveled end to thread the workpiece onto which can then be used as a press tool to set the angle...
Like I say, it has been tricky. Harder than the wheelsets almost. The sanding rods are also now made: strips of sheet bent over and little profile milled bell cranks. The support for the long rod is a turning with the end part filed to shape and a rectangular hole cut into it.
Do enjoy your modelling.
Tom