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 03:33:04 GMT
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Viewed:
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642 times
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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)
John Henry Kruer wrote:
> Hello, all. I know I don't post here much 'cause I'm more of a space fan...
> but I just wanted to ask you all for some help.
>
> My 8th grade science teacher assigned us a project in which we have to make
> and race a model solar car. So, because of my (right) belief that Lego can
> do anything, I've made the body out of Lego and modified a Lego gear to the
> car motor.
>
> You can see some pictures here:
> http://www.jhkruer.com/stuff/
>
> My challenge is to make a light, fast car. The primary concern is the
> transmition, right now I just use a 1:1 ratio of 24 tooth gears, and either
> the thick small technic wheels or the really thin wheels. (see the link for
> two different combinations of gears and wheels)
>
> So, do you guys have any ideas for a light, strong wheel and gear train?
> Thanks!
>
> -JHK
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Message has 1 Reply:
 | | 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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Message is in Reply To:
| | Lego solar car
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| Hello, all. I know I don't post here much 'cause I'm more of a space fan... but I just wanted to ask you all for some help. My 8th grade science teacher assigned us a project in which we have to make and race a model solar car. So, because of my (...) (21 years ago, 19-Apr-03, to lugnet.technic)
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