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Subject: 
Re: More about DDK (was Re: Micro Scout can run off its own motor
Newsgroups: 
lugnet.robotics
Date: 
Tue, 7 Sep 1999 18:03:57 GMT
Viewed: 
676 times
  
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



Message has 1 Reply:
  Re: More about DDK (was Re: Micro Scout can run off its own motor
 
Oops, I screwed two of those up. I should have said "1:1.67" and "1.67:1" ratios, in place of "1:1.4" and "1.4:1". (...) - Robert Munafo (URL) LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13 (25 years ago, 7-Sep-99, to lugnet.robotics)

Message is in Reply To:
  Re: More about DDK (was Re: Micro Scout can run off its own motor
 
(...) 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... Cheers, - Ben. ---...--- Ben Williamson benw@pobox.com (URL) you check the web site first?: (URL) (25 years ago, 6-Sep-99, to lugnet.robotics)

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