Wheelset Curiosity

Discussion in 'Getting Started' started by Joe_Derailer, Mar 1, 2006.

  1. Joe_Derailer

    Joe_Derailer New Member

    I was always wondering why when real trains derail, I always see a mess of loose wheelsets. And that's because the wheels are not fully connected to the truck. The truck is placed on the wheelsets with no attatchments underneath. I wonderd that because the trucks of model trains do not have this problem. Unless they use the same technique as real trains. :D
  2. 60103

    60103 Pooh Bah

    and the reason that you often see axles separated from the trucks is that in some of them the journal boxes are not part of the sideframe structure. (Not sure if this still applies).
  3. Joe_Derailer

    Joe_Derailer New Member

    Yup! And it does apply. Thanks..:)
  4. Russ Bellinis

    Russ Bellinis Active Member

    I think it also has to do with weight and mass. The prototype cars will often weigh 100 tons. Derail a 100 ton car at speed, and who knows what will result. Our trains are so light that the weight to strength ratio is much higher than the prototype. I think the side frames sit on the journal boxes by gravity. Also the trucks are not fastened to the cars, but sit on "king pins" that stay in their socket by gravity.

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