Thanks Jim, my thoughts were if one were to go through the effort of
replacing some of the Pacific Rail Shops stirrups it should be done with
a more durable product. I have more PRS cars than any other brand on my
layout and all are reasonably sturdy except for the stirrups on the
reefers.
Bob Werre
PhotoTraxx
On 4/21/12 9:36 AM, SMMW wrote:
Bob,
Polypropylene has similar properties (not identical) to Delrin when it
comes to flexibility. Delrin, a trade name of an acetal resin (Celcon
is another trade name), can literately be tied in a know without
breaking but it's VERY difficult to paint. Acrylics works well on
Delrin and other "engineering plastics" which PE and PP are members
of. I run PP because it processes MUCH easier than Delrin and the
parts are pigmented a dark brown so if your paint chips off, and it
will over time due to handling, you won't be staring at a white piece.
I do plan to keep these detail parts in stock on a regular basis.
Molded parts need to be run in batches but the urethane castings can
be made as-needed. I sold out of the #1 stirrup in about 15 minutes
and #2 is now gone but I'm going to run more after next week when I
receive a piece of new steel for my injection mold.
Jim King
Smoky Mountain Model Works, Inc.
Ph. (828) 777-5619
_<www.smokymountainmodelworks.com>_
