Subject:
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Re: building thicker technic axles
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Newsgroups:
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lugnet.technic
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Date:
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Fri, 30 Nov 2001 04:09:53 GMT
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Viewed:
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1019 times
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In lugnet.technic, Reinard van Loo writes:
> In lugnet.technic, Ray Sanders writes:
> >
> > One thing I noticed about Technic Axles is that they seem to have a bit of
> > rational flex. You have to have something with a bit of mass being rotated • about
> > the axle to notice it. Look at my znap/technic ferris wheel here ...
> >
> > <http://www.brickshelf.com/cgi-bin/gallery.cgi?f=6513>
> >
> > The center pivot is a pair of 12L Technic Axles with some zanp parts for the
> > load bearing. I have noticed that if I stop the motor abruptly, the mass of • the
> > ferris wheel tries to keep turning and the axle flexs a little ( ~5-deg ) and
> > then recovers back to the correct spot.
> >
> > Ray
>
> same thing on the helicoptor rotor I've made. To counter this I made a
> 'one-direction'-drive that 'slipped'
> when the motor stooped. See
> http://members.chello.at/reinard-van-loo/Lego/tips.html (fifth item in list) • and
> http://members.chello.at/reinard-van-loo/Resources/drive_free_run_mech.jpg.
I also did this with my helicopter, but used a different technique
http://www.lugnet.com/~469/projects/helicopter
> Also, the axle driving the rotor also had to bee strengthened. I put an axle
> trough a set of 2*2*1 round bricks
> (part 3941 on http://guide.lugnet.com/partsref/search.cgi?q=corner+round) ,
> and on the bottom used a
> wedge belt wheel (part 4185 on
> http://guide.lugnet.com/partsref/search.cgi?q=wedge+belt+wheel) to let it
> 'rest' on a flat surface, so that it would not bend trough too much. For
> pictures: see
> http://members.chello.at/reinard-van-loo/Resources/MAIN_ROTOR_det1.jpg
I found bushes added enough strength, though my rotor was only 2 blades. Also
note the rotor axle was actually 2 joined axles, and extended about 10 studs
without support.
ROSCO
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Message is in Reply To:
 | | Re: building thicker technic axles
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| (...) same thing on the helicoptor rotor I've made. To counter this I made a 'one-direction'-drive that 'slipped' when the motor stooped. See (URL) (fifth item in list) and (URL) the axle driving the rotor also had to bee strengthened. I put an axle (...) (23 years ago, 29-Nov-01, to lugnet.technic)
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