Rebuilding the Iantha Branch

Discussion in 'Freelance' started by Iantha_Branch, Jul 1, 2018.

  1. gjslsffan

    gjslsffan Staff Member Staff Member Supporter

    Locos or cars or both?
  2. Iantha_Branch

    Iantha_Branch Member

    Mostly cars.
  3. modeltruckshop

    modeltruckshop Member Supporter

    Are they light cars that derail?
  4. gjslsffan

    gjslsffan Staff Member Staff Member Supporter

    I was looking at your video Ethan and heard a car derail in the video, right at the end, but didn't see it. You might need to see if your bolster mount screws are too tight, not having enough lateral play. Sometimes when those screws are tightened the trucks can become stiff to rotate as the result of the plastic expanding when the screws are tightened. I have dealt with this wrinkle for decades. You do have an NMRA gauge right? Not trying to be condescending here just trying to help.
    Ozarktraveler likes this.
  5. bob_wintle

    bob_wintle Member Supporter

    Do your wheels spin easily? If not you need to invest in a Truck tuner. These can be purchased through Micro Mark. Are you using Metal wheels. If so change over to metal wheels sets as you can. Get your self an NMRA gage. Go to the NMRA website and look at weighting cars. By the way there is an Swap meet in Payne County or at least there used to be. Ive never been to one but I will research it and let you know. Good to see you are getting back to Modeling.
    Ozarktraveler likes this.
  6. Joe Lovett

    Joe Lovett Member

    Ethan, you might try to add weight to the light railcars to bring them up to standard. I don't know what the formula is for HO scale but it has been posted here on Frisco org. Don't know where, maybe someone else can answer that.

  7. bob_wintle

    bob_wintle Member Supporter

    The standard is 1 Ounce for the car plus 1/2 ounce for each inch the car is long. When doing this you want to keep the weight centered over each truck and as low a center of gravity as possible. I have been using big Nuts that I buy at the hard ware store. I have also used old wheel weights I get from my work.

    This is a link to the weight standard
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  8. Iantha_Branch

    Iantha_Branch Member

    Thanks for the input everyone.
    The cars I was running were a mix of of bowser open hoppers, athearn rtr box cars and p2k gondolas. They might all be a little on the light side, but I would think they had enough weight to not cause problems. About half the cars had metal wheels. The trucks all seem to be free and not over tightened. I do have a gauge somewhere but I haven't found it yet. I'll have to keep looking.
    Ozarktraveler and Joe Lovett like this.
  9. Coonskin

    Coonskin Member

    You used flex, sectional, and prefab switches, right?

    If so, doubt it's a gauge issue.

    Assuming the trucks pivot freely, it sounds like flanges that are picking at joints/switch points.

    Do they derail to the outside of curves? If so, the wheels are climbing the rail, as if picking a joint. If the trucks don't swivel freely enough, then they can "crab" (scrub along slightly cock-eyed with pressure against the inside of the ball of the rail) and pick joints/points/etc. Be sure to check each and every joint/switch point (inside the gauge and top of the rail) to make sure your finger nail doesn't feel a slight mismatch.

    Likely anyone of us modeling "lifers" could diagnose your issues and get you on your way to fixing it IF we were close enough to actually visit you and see the issues firsthand. The typed word is pretty clumsy. Sometimes these things are obvious, sometimes not so.

    Good luck.

    Ozarktraveler and Joe Lovett like this.
  10. bob_wintle

    bob_wintle Member Supporter

    Ethan, my son lives in Stillwater. He owns District Bicycles. 7th and Husband. Next time I go down there I will let you know.
    Iantha_Branch and Joe Lovett like this.
  11. Iantha_Branch

    Iantha_Branch Member

    I use atlas code 83 flex track and custom line #4 switches. I have the points spiked in place so they cannot move.
    I went back and double checked, all the trucks have the right amount of flex to them and all the wheels turn freely.
    I do have one turn where they like to climb over the rail going down a slight grade.

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