Model Brake Component Size To Westinghouse Brake Component Size Comparison
Photos by Lester Breuer
I measured the Tichy Train Group (Tichy), Cal-Sale and Precision Scale model brake components to compare to prototype parts measurements from a 1951 Westinghouse Freight Car Brake Equipment document.
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| Tichy Train Group brake gear. (Click on this or any photo to enlarge.) |
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| Cal-Scale brake gear measured. |
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| Precision Scale brake parts measured. |
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| Westinghouse Air Brake Company booklet George obtained prototype brake component measurements. |
George’s measurements made with a Digital Dial Caliper are as follows:
AB Valve Reservoir Brake Cylinder
Prototype Length = 22 1/4 in. Length = 41 1/8 in. Length = 27 3/16 in.
Height = 13 3/4 in. Diameter = 18 7/8 in. Diameter = 13 1/4 in.
Tichy Length = 22.9 in. Length = 37.5 in. Length = 26.5 in.
Height = 10.8 in. Diameter = 18.26 in. Diameter = 13.8 in.
Cal-Scale Length = 26 in. Length = 43 in. Length = 26.5 in.
Height = 11.2 in. Diameter = 21.5 in. Diameter = 15.5 in.
Precision Length = 43 in.
Scale Diameter = 21 in.
Based on these measurements I have concluded the 1951 specs are closest to Tichy Train Group brake components. The specs I was given by someone, I do not remember who, gave me larger specs for the reservoir leading me to think that the Precision or Cal-Scale components would be the closest. However, based on my findings, I guess I will continue to use Tichy brake components until proven otherwise.
My measurements may be off by a factor of .010 as it often depends where you measure the part, but I was surprised at the results based upon the official drawings.
George Toman
Thank You George for sharing the above brake component data you compiled.
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