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Recent thread with some good information. Click on the underlined phrase to access.

When you buy a A-B-A set, are they already synced so that the two power units are both operating?  They can be, but not necessarily.  There should be instruction in the set.  There are two (A units), you would still have to choose the lead A unit, and  the rear A unit can be positioned either nose/rear forward.  There should be programming options for these choices.  (Not a cut and dry set up)
If you buy 2 engines seperatly can you lash them to make both power units work? or is it only certain types of engines?  Again not a yes and no answer, there are a lot of different combinations available.  I have had very good results with straight TMCC units and TMCC units with EOB speed control.  I have posted this video of Atlas SW9 units with TMCC and an Atlas GP7 with TMCC/EOB speed control.  It works and works well, all (5) units are powered. Click on the image to access the video.


I try not to comment of general response on this forum, but maybe, just maybe, some need to take a long walk and clear their head on occasion.  Just answer the guys question.  Mike CT

Last edited by Mike CT
Originally Posted by D500:

Well, you could just buy a 2-6-6-2, for example; one loco, two engines and they come

eternally lashed. No prob.

Except on most model articulated steam locomotives, there is a drive shaft connecting the front engine with the rear engine, so they are mechanically connected, and thus not "electrically lashed".

It would be VERY helpful here to state which locomotive(s) you are asking about.

 

In "conventional" (i.e. using the transformer lever) control, A-A sets often have one powered and one DUMMY locomotive. The dummy locomotive is just along for the ride, same as any other car. Therefore no conflict. Nothing to sync up.

 

With two powered "conventional" locomotives, you either lock them in single-direction mode (100% reliable), or manually sync up their E-units so that they move together (works most of the time).

 

Conventional locomotives move in a predictable pattern if their e-unit is working properly. Either forward-reverse-forward, or forward-neutral-reverse-neutral-forward depending on the type of e-unit they have. You just need to get the two locomotives at the same point in the sequence, and they will move together as long as you keep them on the same track with the same power source.

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