Slow Down Super Streets Antique Trucks

Nice thinking and a good approach.  I have done something similar with some of mine, and found that each vehicle requires fine tuning as to resistor amount to get it to close to a common speed.

Another approach is to put a string of several diodes in series with the motor - each reduces voltage to the motor by about .6 volts, two to four usually do the trick.  Here, you can get the material "free" - I remove the rectifier in all my vehicles (so they will back up on reverse DC).  You can wire a rectifier as two diodes in series, or use two, which usually fit in most vehicles, to create a bigger voltage voltage drop if need be.

I didn't discuss this in either of my 'Streets books and sort of wish I had, as it is a good sound way to adjust speeds so different vehicles will co-exist on the same loop.

This is definitely beyond my capabilities.

Me too  James

Good work, however you might as well be talking Chinese as I barely made it through circuits in college. I understand in principal what you're doing, but my soldering skills are limited to soldering wires to track (14 gauge and larger), anything as small as trains and vehicles wouldn't be pretty.

I have about a half dozen of the K-Line by Lionel old-time trucks that I purchased when still in the planning stages of my RR. I tried two of them when I got my streets operational and they are too fast.