Matt Russell said:
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One more thing to mention. If you run a train longer than 18-20 cars, with body mounted kadee 906 on 10ft diameter curves, you will have to notch the coupler box. The wheels will drag and cause the train to streamline otherwise. Kadee does have a coupler that has a swinging gear box, I can’t think of the model number though. I just prefer the 906 for the slack action.
Also, in my experience, stock couplers will not stay together with a longer train. At least they didn’t for me. Aristo couplers would pull apart leaving half the train sitting.
Kadee couplers are by far the best. Also, if you have a USA Trains engine, look into the campac box. It works amazing and looks even better.
Matt,
Having looked at your nice train video with USA Trains 4 Bay Cylindrical Hoppers & AML PS 4750 Covered Hoppers that have trucks close to the end of the car, the Kadee 830/906 type coupler boxes do need to be notched for operation on tighter curves as you said.
Example notching shown below for the AML 4750 Hopper:
Note the box ears are also trimmed so mounting includes the screw at its center.
-Ted