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Subject: 
Re: building thicker technic axles
Newsgroups: 
lugnet.technic
Date: 
Thu, 29 Nov 2001 22:46:39 GMT
Viewed: 
759 times
  
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.

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

---Reinard



Message has 1 Reply:
  Re: building thicker technic axles
 
(...) about (...) the (...) and (...) (URL)Also, the axle driving the rotor also had to bee strengthened. I put an axle (...) note the rotor axle was actually 2 joined axles, and extended about 10 studs without support. ROSCO (23 years ago, 30-Nov-01, to lugnet.technic)

Message is in Reply To:
  Re: building thicker technic axles
 
(...) 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 ... (URL) The center (...) (23 years ago, 27-Nov-01, to lugnet.technic)

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