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| Re: Calculation (36277) | |||
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Re: Calculation |
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Posted by Dan Lawrence on Thu Jan 6 10:43:54 2005, in response to Re: Calculation, posted by SelkirkTMO on Thu Jan 6 08:00:33 2005. Interesting.Our ABB LRV's have the rubber chevrons in their trucks, which were touted as "Self-Steering" to reduce rail wear in curves (which we have a lot of, including several 30 foot "flange screamers". What actually happened is that after 10 years of service, a lot of rail had to be replaced since the trucks actually beat the rail to death. The wear was heaviest in the street trackage between Mount Royal and Camden stations. The curves from Mount Royal to Oliver Street had sunk 4 1/2" below the street surface. All the rail on Howard Street was originally laid with a weird concrete and gunnite mix to hold the rail in place. Nobody when the line was being built knew exactly what would happen to the rail when the energy from a stopping car/train would transfer to the rail. During the shutdown during the July 2001 Howard Street Tunnel fire, all the rail was ripped out and new 128 pound rail was laid using standard anchoring fixtures. We will see how the rail behaves in the next 10 years. |
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