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Reply to "Another stumper: Two identical BiPolars with PS3 run at different speeds"

What he said.

Pick a speed. Run 2 engines separately and note Z4000 amp reading. Amps will bounce around a bit going around curves vs. straights and such. Then couple engines and run at same speed. You don't even have to set up a MU in dcs...just "force them" to couple while running.  Note this is just an experiment.

Now observe the Z4000 Amps. Ideally they would be the same as when separate. But if there is dragging or pushing the Amps will be slightly higher. The question is whether this "tax" is burdensome. For example you could measure the increased current pulling a few cars and make an equivalence...running a MU has an Amps tax of adding 5 box cars or something like that.

Of course if there is some dramatic increase in Amps (like it doubles) when the 2 engines run coupled vs. decoupled, then stop immediately.

Last edited by stan2004

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