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Reply to "run two legeacy trains on same line"

I should have further explained:

Odyssey and cruise or speed control in general-

#1 assumes you are in a command control digital system where a speed is commanded. In other words, while some systems may support limited- keyword there- control in conventional, they work best under digital control.

#2 In order for the concept to even work, the source voltage on the track has to be higher than the DC motor trying to be speed controlled requires for that load and RPM. In other words- head room- extra voltage that the controller can regulate to attempt to vary and maintain a given rpm under load. This is why conventional control is limited- you lack headroom. If the source voltage is determining the speed- as load increases (drag in curves, up grades) there is no headroom voltage for the motor to increase torque to maintain RPM.

#3 Again, because this is RPM based at the motor, and wheel size and gearing come into play, as well as traction and other factors- it's not like a Tesla or other advanced distance following cruise control system where it has a distance of the vehicle in front or back to maintain a distance.

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