Subject:
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Re: Idea for new train wheel
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Newsgroups:
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lugnet.parts.custom
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Date:
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Fri, 30 Jul 2004 18:14:20 GMT
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Viewed:
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3155 times
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In lugnet.parts.custom, Rob Hendrix wrote:
> > Do we need the whole wheel to be metal? Or would snap on tyres be sufficient?
> > What if you made metal flanged (and blind) tyres that snapped onto the current
> > BBB blind wheel? It would increase the size a bit, no doubt but might avoid the
> > expensive part of the tooling (the spokes and axle hub and stuff)
> >
> > What arrangments owuld you make for power transfer? Wipers? Something that was a
> > pair of wipers at one end (that somehow fit into something LEGO) and a 2x2 wire
> > connector at the other end might be a good approach
>
> My thinking was to use a technic beam as the support structure and have a
> small ball bearing (bee bee?) and spring in one of the technic holes behing
> the wheel. That way, the ball bearing would make contact behind the wheel
> and the spring would ensure tension. I could solder a wire to the spring
> and go from there to the motor. Of course, all this is rough speculation...
>
> But I'm thinking,
> Rob
A sufficiently thin wiper made of spring metal, vertically arranged, with a
horizontal tab with a suitable hole punched in it so that it would fit between
two plates to hold it in place, which then had a wire soldered to it leading off
to the side, might also work. This is the scheme used in many systems and gives
good contact performance. I think, since it's a sliding contact, it tends to
self clean.
But your arrangement might have less drag.
I wonder what the gearing needs to be to have a loco so powered (of reasonable
weight) have similar performance characteristics (speed vs. regulator setting)
as a conventional motor
I also wonder what the market size for this is?
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Message is in Reply To:
 | | Re: Idea for new train wheel
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| (...) sufficient? (...) current (...) avoid the (...) was a (...) wire (...) My thinking was to use a technic beam as the support structure and have a small ball bearing (bee bee?) and spring in one of the technic holes behing the wheel. That way, (...) (20 years ago, 30-Jul-04, to lugnet.parts.custom)
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