Subject:
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9v vs 12v in traction
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 23 Dec 1999 20:13:39 GMT
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Viewed:
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900 times
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Several measures to increase traction for the 12v trains do not present in the
9v trains, for example the serrated tracks, the rubber bands on wheels, and
the inclusion of weight bricks in the locomotive. Does it mean a 12v
locomotive can pull a lot more than a 9v one?
Also, in Lego's instructions to convert the locomotive of 7722 from 4.5v to
12v, it also adds two weight bricks to the locomotive. (See
<http://www.brickshelf.com/scans/7000/7722/7722-31.html> versus
<http://www.brickshelf.com/scans/7000/7722/7722-03.html>.) Why do you need to
increase the weight when powered from the 12v tracks, but not when powered
from the 4.5v batteries?
Cheers,
Hao-yang Wang
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Message has 1 Reply:
 | | Re: 9v vs 12v in traction
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| (...) As for the 12v track, the motors have two conductors on the bottom, to coincide with the ones that run in the middle of the track. The weights are to make sure the electrodes will stay together. If the train was too light, they may not touch, (...) (25 years ago, 23-Dec-99, to lugnet.trains)
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