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jimrice4449, please pardon my "slo-mo" grasp of the momentum issue. Hypothetically, if you need to send a 4 car "cut" (e.g., tank cars) to a single track while the next (e.g., gondola) must go to a different track, followed by yet another 'cut' of 2 cars (e.g. reefers) to a third track...is the momentary contact switch for uncoupling "iffy?" Next question, would the same weight for every car help in selecting the retarders setting in advance? Heavy loads for flat cars for example, could bring them close to the same weight as the heaviest car "over the hump." These are just random questions on an absolutely fascinating aspect of the hobby. Regards.
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