Re: Model brake component size comparison to prototype

Schuyler Larrabee

Tim, I believe you’re correct about this process.  I’ll have to look at the information on Lester’s blog and measure a few things.




From: <> On Behalf Of Tim O'Connor
Sent: Saturday, April 04, 2020 9:15 AM
Subject: Re: [RealSTMFC] Model brake component size comparison to prototype


As I recall, all Cal-Scale detail components were OVERSIZE because they were used
for lost wax casting! In that process the plastic parts are for the molds and are
destroyed in the casting process, and the shrinkage produces parts that are closer
to scale.

Or am I wrong? :-)

Tim O'Connor


On 4/4/2020 9:00 AM, Lester Breuer wrote:

A comparison of several manufacturers’ model brake component measurements to Westinghouse prototype brake component measurements prepared by George Toman was sent to me for my use.  I asked George to share his measurements comparison on my blog.  If you are interested in the  comparison measurements, they are now available on my blog I have to share photos and writeup of projects on my Minneapolis & Northland Railroad Company. If would like to take a look please do at the following link:


Lester Breuer


Tim O'Connor
Sterling, Massachusetts

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