I would have thought the solution is to make the contact section longer so it gets two bogies on it. Strikes me that having only one bogie on a contact track is risking missed detection anyway.

An easy solution would be to run a BR103 in front of the railcar, as in this picture!

It seems like the TRIX equivalent 22100 model MIGHT have what I am looking for, but I can't see it clearly on the photos online.
Does anybody own, -or have access to- that model, and can post and/or confirm that the motorized bogies only have 2 traction tires???

Don't worry about the photo; I know exactly what you mean, as I am about to do the same. -At least until I can get my hands on some replacement wheels.



I already tried that, but that is impossible, as the other wheels are of another diameter. Both flanges and axles. (They are quite a lot smaller than the motorized bogies)

You have attached the drawing of the Märklin unit (which I already have), but if you look at the same drawing from the Trix unit, you can see 2 different references for the motorized wheels. Looking at some photos online, it SEEMS that the Trix unit has only 2 traction tires; one on each axle. It's wheels are of course isolated, but the question is if the flanges can be removed, and made into one single conductive wheel-set. (It would depend on how and where the plastic bushing for isolating the flange against the axle is located)

I have no problem with the traction. Anyway it will not be divided by 2, as the trailing motor-unit will be pushing happily along with its original 4 traction tires.(**)
The photos of the Trix unit seems to confirm the viability too, although I am still not too sure because of bad quality photos online.
Further examination of the issue shows many others having the same problem on the Stummi forum (and other places). I'm definitely NOT going to change anything on my permanent layout, where my LONG feedback sections have worked fine for almost 15 years with a huge variety of locos and brands...

Thanks for you comment Johnjean, I will get to work on the slider right away!

(**) As an analogue user, I can only use this train driving in ONE direction, as a longer power-cut-off will have the train reverting back to its "original" forward direction anyway, with no regards to it´s last heading. (The primary forward direction always being the motor-unit where the decoder is located)
So I don't have to change the trailing motor unit anyway, as I will never be running it in that direction (for long). Just another of many small odd prices analogue users pay to STAY analogue...

I finally found a "nice" pic of the TRIX motor bogie.
It's not quite as I thought, as the two traction tyres are on the same axle, but does confirm the existence of a replacement wheel-set w.o. traction tyres.
I don't know if catwiki allows a direct link to a photo, but here it is;

[According to the TRIX specification drawing, that would be sparepart 308462.
I would need TWO of them, in order to convert them into 1 un-isolated wheel-set... *IF* only one side of the flanges are isolated!
¿How are Trix DC wheels normally isolated?

PS: I made a slider as mentioned by Johnjean, and it works. But it is quite flimsy and I am not too happy with it. But at least I can let the train run on my automated layout, and ENJOY the spectacle!