tag:blogger.com,1999:blog-20340207.post2593954708728979418..comments2024-03-28T08:32:05.600+00:00Comments on Phil's Workbench: Railcar chassisUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-20340207.post-47626076025427903502014-12-17T17:14:28.383+00:002014-12-17T17:14:28.383+00:00'tis true. Whitemetal solder is wonderful stuf...'tis true. Whitemetal solder is wonderful stuff for replacing anything removed in error.Phil Parkerhttps://www.blogger.com/profile/15673614093646938053noreply@blogger.comtag:blogger.com,1999:blog-20340207.post-5927505740939105572014-12-17T16:30:49.778+00:002014-12-17T16:30:49.778+00:00The old white metal casters' problem of shrink...The old white metal casters' problem of shrinkage, assuming the master worked in the first place. Don't blame the patternmaker. I've been making brass masters since 1971 and I have never yet found a caster who could give me a reliable shrinkage figure. I've heard everything from "Nothing much" to 8% cross sectional, 5% linear. And resin's no better. Sometimes it does, sometimes it don't. Linear can be almost negligible, whilst cross sectional can astonish you! The answer, is epoxy, which few do, but shrinkage is not a problem.<br />Persevere as it's only a chunk of w/m, to which corrections can be either wrought or attached. No sweat!Oddshttps://www.blogger.com/profile/15406048947308249483noreply@blogger.com