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| Re: Could you actually make LIRR and MNRR third rail shoes compatable? (56060) | |||
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Re: Could you actually make LIRR and MNRR third rail shoes compatable? |
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Posted by willD on Fri Feb 25 23:40:57 2005, in response to Re: Could you actually make LIRR and MNRR third rail shoes compatable?, posted by Dutchrailnut on Fri Feb 25 20:12:21 2005. I don't know if it'd neccesarily be the best solution, but either a hydraulic (or pnumatic) ram or a small electric driven screw could raise or lower the proposed double-sided 3rd rail shoe relative to the height of the running rails. I do not know what the nominal heights of either the MN or LIRR 3rd rails, but this way via a switch in the cab the shoe could be configured for either system. On a Dual Mode there'd be ample time to make the switch, hopefully most crews would have an oppertunity to make the 3rd rail shoe height change prior to the first segment of 3rd rail. On an EMU it'd be far more difficult (unless that EMU was also equipped with a 3rd power source, be it diesel, cat, or battery), since it's debatable how the EMU could make the transition without completely losing power.On a somwhat related note, do the P32DM-AC's 3rd rail shoes always touch the 3rd rail regardless of their mode of operation? If they're always in contact with the 3rd rail, what happens to the power? Does any of it leak to the ground? |
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