K Line operating cars

One of the postwar coal dump cars, 3359, had dual grey bins and if I remember the bin raised a notch every time you pushed the unload button.  Much more controlled than the 3469. Don't recall any gradual motion unload on the log cars.

Of course that defeated the ability to have contests on how far you could throw the coal, or at my house the black eyed peas.

The Lionel 3361 log dump car had a mechanism that is similar to that of the 3359 twin bin dump car.

The cradle would raise a bit with each press of the button till it reached the end of the cam, and then drop back down suddenly.

Sometimes one log would be stubborn and stay on the cradle.

In my experience, the 3359 twin dump was prone to jamming. since the bin only goes up a bit at a time, the coal would get caught between the door and the bin.

I don't know about the K-Line cars, but the MTH cars are motorized, with cam profiles to shake coal/logs at the top of the travel cycle. You can run them as fast or slow as you want.

My K-Line dump cars operate slow and controlled.  I like them better than the MTH dump cars because the K-Line cars stop in the fully retracted position, whereas my MTH dump car continually cycles.  I have to guess when the MTH car is fully retracted.

Earl