Subject:
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Re: More about DDK (was Re: Micro Scout can run off its own motor
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 7 Sep 1999 18:03:57 GMT
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Viewed:
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851 times
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In lugnet.robotics, lego-robotics@crynwr.com (Ben Williamson) writes:
> On Mon, 6 Sep 1999, Ian Sinclair wrote:
>
> > New gears... Excellent.
> >
> > Has anyone seen these gears in any other sets besides the Droid Kit?
>
> I got mine in the 8448 super car. They provide some of the five
> forward speeds in the gearbox. That's a sweet gearbox too...
That makes sense. With the two new sizes you end up with five different ratios
that can be constructed with two gears at a 2-stud (16 millimeter) axle
spacing:
8 <-> 24 1:3 ratio
12 <-> 20 1:1.4 ratio
16 <-> 16 1:1 ratio
20 <-> 12 1.4:1 ratio
24 <-> 8 3:1 ratio
and of course
8 <-> 8 <-> 8 1:1 ratio in reverse
although I doubt that's how they actually did the reverse, but it's pretty
clear the forward gears should be done this way. The uniform spacing of the
axles and the fairly small overall size makes it a great way to do a gearshift
transmission.
- Robert Munafo http://www.mrob.com/
LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13
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