Subject:
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Re: Why is inner rail smooth on Duplo track?
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Newsgroups:
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lugnet.duplo, lugnet.trains
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Date:
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Tue, 5 Jul 2005 23:32:41 GMT
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Viewed:
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564 times
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Joe Strout wrote:
> My son has spend his allowance on a couple of the new Thomas sets
> (Percy and James). James comes with one piece of curved track (along
> with others including a switch).
>
> I've noticed that all the Duplo track that's come with these sets has
> a ribbed texture on the rails, with the exception of the curved track
> - that's ribbed on the outside rail, like everything else, but the
> inside rail is smooth.
>
> This has been puzzling me. Can anyone think of a reason why the
> inside rail of a curve piece should be smooth rather than textured?
The texture is to improve traction. However, without a differential (which
have been tried on trains and failed), one wheel on an axle needs to be able
to slip in a curve since the rotational speeds are different for the
different radii that each wheel traverses. Because of this, it's important
for one of the rails in a curve to not have the traction enhancing texture.
Frank
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Message is in Reply To:
 | | Why is inner rail smooth on Duplo track?
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| My son has spend his allowance on a couple of the new Thomas sets (Percy and James). James comes with one piece of curved track (along with others including a switch). I've noticed that all the Duplo track that's come with these sets has a ribbed (...) (19 years ago, 4-Jul-05, to lugnet.duplo, lugnet.trains, FTX)
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