Coach Bogie

Reference Pic 1

Reference Pic 2

 

I originally designed this as a placeholder design until I could fix my problems I'm having with Cale's passenger truck, but looking at it now I like it so much I may just leave it like this. It looks pretty close to the prototype, even if the journey boxes (is that the right term?) don't line up with the axles.

  • Daniel Aubin 5y

    The proper term is a journal box (pretty close) because it houses a journal bearing. A journal bearing is a solid bearing, such as a brass ring, that requires constant lubrification (oil), hence the lid. Lack of lubrification would destroy the brass ring and create heat by friction, a dangerous situation. This is called a hot box. Modern trains use roller bearings to eliminate this problem.

    Looking at your truck design while thinking of your heavy car problem I have a suggestion. You could lower the turn-table by one plate and use a 4x4 round plate to better spread the weight of the car on the truck. Or even lower the turn-table and round plate by a further one plate, thus leaving place for a 2x12 or 2x16 plate to reinforce the car's frame, if it doesn't keep the truck from turning (have to think of those tight LEGO curves!).
  • Tony Sava 5y

    Those are some pretty good ideas. I'll try them tonight when I'm home.
  • Tony Sava 5y

    After thinking about it a bit, I think the best to do would be to put a 4x8 plate under the tiles under the turntable, raising them. While it won't reinforce the base of the coach, and won't be entirely prototypical, it would reinforce the wheels since in this design they're only held in place on top (and thus where the load is placed) by the 4 2x2 tiles above them.
  • Cale Leiphart 5y

    I like this. I like it a lot.
  • Peter.A.B 5y

    Hi Tony, any chance of a breakdown pic so I can see how the wheels are attached? I'm still playing around with bogie designs for my umbauwagen. I have a nice looking bogie combining Gamborts slider bogie and the recent flex sprung bogie but it doesn't run reliably. The wheels have too much friction, and the close coupling makes one buffer ride up the next which causes derailments, so it's pretty much back to the drawing board.
  • Tony Sava 5y

    It's going to be a while before I have some free time, but I can tell you that the wheels are sandwiched between 1x2 door rails - 2 on top, 2 on bottom for a total of 8 on the whole bogie. It makes for a very low friction bogie, but it's a lot shorter than your standard bogie, even shorter than Cale's design.
  • wardlws 5y

    That looks great, and no tubing to cut! I'm going to have to give this a try.
  • Tony Sava 5y

    Ok, I've built this in real life, and I need to make the following adjustment to what is pictured. Everything is basically the same, but a 2x6 plate needs to replace the tiles under the turntable, running the length of the truck - axle to axle. This spreads the weight out on top of the axles and prevents it from tearing itself a part under exceptional stress.

    The overall look of the design is unchanged, except there are eight visible studs, four on either side of the turntable between the wheels.
  • Shuppiluliumas 5y

    I really like this. And it couldn't have come at a better time for me. I've been fussing around with some trucks for a while now. This gives me something new to think about.
  • Chris "wunztwice" 5y

    For some variation you could use some cheese slopes in place of the 1x1 round plates on the grease boxes to add the prototypical slope many of those have. Depending on the prototype, of course!
  • Tony Sava 5y

    Passenger Truck Instructions by SavaTheAggie
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Taken on September 1, 2010
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