This casting is a base for a steam engine.Dimensions are 21" X 8 5/8" X 4 1/4".Weight is about 30#.It was cast in petrobond sand.
The frame of the engine will be a great deal more intricate so,I think I will try lost foam.Since I do not have a CNC machine or access to one,I will have to cut individual peices and attach them.The way I see it,I have 2 options,glue the peices together,or use long,thin pins to hold the peices together,coat them with a few layers of drywall compound,then pull the pins out and recoat.Any thoughts on the second method would be greatly appreciated.
Thanks to all those who have shared their knowledge on this forum.