Subject:
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Re: Lego solar car
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Newsgroups:
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lugnet.technic
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Date:
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Sun, 20 Apr 2003 19:52:43 GMT
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Viewed:
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689 times
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Ahh, thanks guys. I've tried larger wheels, and even though they look
funny, they work the best- a lot better, even now in late afternoon. And
I've added more torque using a larger gear, which makes it more powerful.
http://jhkruer.com/stuff
A digital camera movie perhaps to follow...
-JHK
In lugnet.technic, Ronald Vallenduuk writes:
> Though worm gears are okay for gearing down, they're bad for friction, so in
> this case I'd stay away from them.
> Also check out this page on the charateristics of various Lego motors:
> http://www.philohome.com/motors/motorcomp.htm
> As for wheels, larger wheels have lower rolling friction, but higher
> weight....
> Personally I'd go for wheels from 8430 or 8422.
>
> Good luck, and let us know how you got on!
>
>
> "Xanthra47" <jmantor@nycap.rr.com> wrote in message
> news:3EA214F0.10708@nycap.rr.com...
> > I'd say you're doing well already : )
> > Look's very light. You might want to
> > use the same wheel as you have in the front
> > in the last 2 pictures for all your wheels.
> >
> > Those wide semi-pnuematic
> > one's have good grip, but they'll suck-up precious
> > watts in rolling friction. You want narrow, hard
> > wheels. The rubber o-ring on the pully is a good
> > compromise.
> >
> > As for the gearing, I'd try experimenting with
> > worm gears. Those little motors are ussually
> > happier at high rpms and most of the toys that
> > I've scavenged for robot parts use at least one
> > worm gear stage in the drive train.
> >
> > One more idea you could gain some stability and
> > trim down weight by using the solar panel itself
> > as the chassis and hanging the front and rear
> > axles off of it as seperate "modules"
> >
> > Gillish's suggestions are good ones too : )
> >
> > PS. Graphite spray for locks works
> > wonderfully with LEGO(R)
> >
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Message is in Reply To:
 | | Re: Lego solar car
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| Though worm gears are okay for gearing down, they're bad for friction, so in this case I'd stay away from them. Also check out this page on the charateristics of various Lego motors: (URL) for wheels, larger wheels have lower rolling friction, but (...) (21 years ago, 20-Apr-03, to lugnet.technic)
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