Need some motor help

RGW1 Aug 11, 2021

  1. RGW1

    RGW1 TrainBoard Member

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    I got this motor off ebay and thought it was the same size as what I have in my 2-6-8-0 (see photos )
    ,but it is smaller. It has the same brush mount as the Mantua stock motor, but is 7 poles compare to the stock 5 pole motor. Can any one give me some specs on the new motor? I have a flywheel that I think could work.

    The engine runs good, but I would like to improve the crawl. My Mantua 2-6-6-2 with the newer stock can motor with flywheel has worse crawl then this older open frame motor.
     

    Attached Files:

  2. fordy744

    fordy744 TrainBoard Member

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    If you want to improve the slow speed you would be better with a can motor not an open frame unit, unless it is heavily reduced in gearing but does not appear to be to me.
     
  3. RGW1

    RGW1 TrainBoard Member

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    Thanks . I do have the stock mantua can motor from the last release logger but it is very small and in my
    2-6-6-2 its crawl is not as good as the 2-6-8-0. To be more specific the crawl on my engine is good but not smooth at very slow speeds ( tends to stall ) I had hoped a fly wheel would help this.

    Also the pickup is only one side of each driver set and one side on each truck. I wanted to used Walthers tender truck from the USRA 0-6-0 ,they have all wheel pick up but the are not available.
     
  4. Cjcrescent

    Cjcrescent TrainBoard Member

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    Mantua's small motors could be a three pole skewed armature motor. The 7 pole motor will run better than a 3 or 5 pole motor, eventually if it a brand new motor, as the bearings haven't been "run in", and brushes worn to better sit on the comuntator.
     
  5. RGW1

    RGW1 TrainBoard Member

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    Thank you for your responses . I think I will try the 7 pole motor. It looks to have the right mounting hole on the frame . One thing is with the extended gear cover for the fourth driver I have to remove this cover to access the motor screw and need to be careful not to crack the JB weld holding it together.
     
  6. fordy744

    fordy744 TrainBoard Member

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    bigger is usually better in terms of motors, trying to use a small motor for a big loco (also big locos tend to pull bigger trains) and will wear out quicker. I'd suggest minimum 22mm diameter can motor for that loco, bigger if possible. A good quality can motor shouldn't need a flywheel, can be beneficial in some cases and on DC. Generally speaking the more poles the better the motor. Good luck.
     

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