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| Re: SMEE (Re: Questions from the eager & curious) (860374) | |||
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Re: SMEE (Re: Questions from the eager & curious) |
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Posted by BLE-NIMX on Wed Nov 18 09:10:48 2009, in response to SMEE (Re: Questions from the eager & curious), posted by straphanger9 on Wed Nov 18 02:44:54 2009. The biggest improvement in SMEE over AMUE is in the SMEE train will remain stationary as long as the compressors are running. The R9 does not keep up its brake cylinder pressure in emergency while a crew is troubleshooting or layed up and will begin to roll away when the leak is found and corrected as they charge in release where SMEE charges brake pipe in full service. Lot less skill needed for SMEE where you can fan the brakes almost forever and as long as the main reservoir doesn't fall below 90, you can still stop where that R9 will not have sufficient air being fed from a brake pipe charged from release. Also NYCT uses emergency magnet valves which you can add as #6 for "brake pipe". An Energized EMV creates a trainline electrical signal to force every car of the train to vent a valve located near the emergency cords and making both ends apply in emergency as soon as the initiating car (car getting tripped, package brake unit sensing rapid brake pipe reduction due to hose leak, rupture or cord pulled) energizes the EMV trainline. |
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