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Old 02-05-2017, 04:24 PM
Snnipe 70E Snnipe 70E is offline
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Join Date: Oct 2008
Location: San Jose, CA
Posts: 3,781
I was told by an old steam train engineer that the size of drivers determined the speed of the engine. A rough estimate of the top speed of a steam engine was found by taking the diameter of drive wheels and multiplying by 10. Gave you the speed by MPH. To go faster would shake the engine apart.