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Re: Where Berg got his 79.99999 speed limit from.
Author: OPRRMS
Date: 01-04-2018 - 10:25
Espee99 Wrote:
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> Thanks for the corrections, it just goes to show
> what one thinks are the facts may not be reality.
> For instance I was under the impression that an
> 'overspeed' work apply the brakes or at least
> unload the unit.
It does both. When a locomotive experiences an "overspeed," the automatic brake valve will make a "Penalty" brake application and the Pneumatic Control Switch (PCS) will open, "unloading" the propulsion electricity being generated by returning the engine speed to idle.
However, the NTSB has not been clear about what their statement regarding this actually means. Clarification will be in their final report, if not before.
-------------------------------------------------------
> Thanks for the corrections, it just goes to show
> what one thinks are the facts may not be reality.
> For instance I was under the impression that an
> 'overspeed' work apply the brakes or at least
> unload the unit.
It does both. When a locomotive experiences an "overspeed," the automatic brake valve will make a "Penalty" brake application and the Pneumatic Control Switch (PCS) will open, "unloading" the propulsion electricity being generated by returning the engine speed to idle.
However, the NTSB has not been clear about what their statement regarding this actually means. Clarification will be in their final report, if not before.
