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Hugar Train


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Hmm, not a very successful day. Took the power car apart to find one wire missing, one brush loose and various nuts, bolts, washers & earth tags missing. Also had to install extra insulation around the the block holding the shoe, the block only being held on by one nut & bolt so 'floats' around a bit. On the test-track it runs (doing my bit to recreate the Ozone Layer) drawing 0.7 - 0.8A from my Gaugemaster PSU. Can't help thinking that a 2nd magnet might help. Set up some of the track on the kitchen floor, to find that the power car alone will with help make a circuit, with the other 3 no chance. What to do? Problems I can see:

  1. No bearings on motor or axles to reduce mechanical resistance.
  2. Too many high (electrical) resistance joints causing to voltage drop from a 'no load' 12v to 8v half way around - see Kirchoff's 2nd Law (EMF = sum of the voltage drops).
  3. Track too uneven at the joints.

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