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helper engines
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I'll tell you what I know. My knowledge is limited. <br />1) Helper link is not the same as dist power. The lead unit does not control the helper throttle (I don't think so anyway). I do know that since there is no physical trainline between the train and helper there are no emergencies when cut off. <br />2)on dist power consists, it still takes 60 sec. for the PCS to reset on the lead and the remote, when the lead starts charging and the remote sences brake pipe pressure, then it will begin charging as well, so you are charging from both ends. <br />3)As far as I know dist power cannot be cut off on the fly. You can from a stop put the lead consist in setout mode and remain linked (for adding/removing power to the lead consist. The lead unit, however cannot be changed without unlinking and re setting up DP. Once you come back against your train, you would put the lead unit back in normal mode and you are ready to go. With the exception on a brake test. <br />4)The brake pipe on the train has never been changed nor has the helper's brake pipe been changed. Not one angle coc has been turned. Fred is still cut in and the helper unit still has control of his brakes. I stated in an earlier post that once dialed in the helper consist mimicks the brake apps. of the train. I spoke out of turn here. It may just be set up to go into emergency if the train does.....I don't know for sure.
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