Subject:
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Re: Working LEGO Clock Tower
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 3 Apr 2003 23:26:45 GMT
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Viewed:
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1847 times
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In lugnet.technic, Ray Sanders writes:
> In lugnet.technic, Chris Phillips writes:
> > The really tricky part (once I understood how to build a clock that would
> > keep running) was to fit everything into the available space. And to keep
> > rebuilding it every time the weight dragged it off my workbench...
> >
> > - Chris.
>
> Have you considered using one (or more) of the pullback motors as an
> alternative power source to the weight on a string ? I believe the larger
> pullbacks (32283) have a technic axle-hole for the take off.
>
> Ray
Yes. I tried the pull-back motor, but it could only run a lightly-geared
clock for a very short time before it lost its oomph. I also tried
stretching the white bungee cords >>theme music of Wile E. Coyote in the
background<< over pulleys, but had the same problem. >>sound of anvil
hitting Chris in the head<< When you store energy in a spring you get less
torque out as the spring relaxes, and past a certain point it can't spin all
the gears.
A weight on a pulley loses a very small amount of torque as the string winds
off the pulley (and its effective radius decreases) but not nearly to the
degree that power tapers in a spring.
I'm actually following a suggestion that came from Dan and Jenn Boger, and
looking at ways to run it with a motor and battery box. This shows the most
promise right now for any pure LEGO solution to power the clock.
At least until LEGO comes out with a potato in a glass of water...
- Chris.
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Working LEGO Clock Tower
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| (...) Have you considered using one (or more) of the pullback motors as an alternative power source to the weight on a string ? I believe the larger pullbacks (32283) have a technic axle-hole for the take off. Ray (22 years ago, 3-Apr-03, to lugnet.technic)
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