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| Re: Calculation (35637) | |||
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Re: Calculation |
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Posted by VictorM on Tue Jan 4 12:30:05 2005, in response to Calculation, posted by Fulton Frank on Tue Jan 4 12:02:10 2005. From what I've seen of flanges they are vertical, with an inner round where they meet the "tread", and a rounded edge at the top. Also on sharp curves there is a guard rail inside the inner rail that presses against the back of the flange on the inner wheel to help keep the wheels on the track. I think the location of the car's center of gravity relative to the track determines the maximum allowable speed on a curve, but I could be wrong. Another interesting thing is that the wheels are rigidly attached to the axle, but since the outer wheel has to travel a greater distance on a curve than the inner wheel, there is some slippage, which explains the "squeal" you often hear. They try to minimize this at the start of some curves by automatically squirting water or grease onto the wheels. The mininum curve radius is (I think) 120 feet for B Division cars and 90 feet for A Division cars. I don't know if it's the inner or outer rail. |
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