Re: [SilverStreak] SS sabre logo casting

["waymark1@xxxxxxxx" <waymark1@xxxxxxxx>]

If you use an original logo casting as a pattern, the new aluminum casting will be smaller 
than the original. Perhaps it won't make any difference, since Tom had just that done.

There are alloys that can be used that will not shrink, such as "linotype" lead alloys, 
which expand very slightly (to fill typesetting molds for sharpness) rather than shrink. 
There are also alloys like "Cerrosafe" that behave similarly. Cerro Metals Corp. has Cerrosafes 
that melt at relatively low temperatures. These are used by many Model Railroaders and other 
modelers to duplicate parts with high detail. Some will melt even in near-boiling water, so 
enterprising RVers might cast parts in their kitchens!
Al