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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Tue, 27 Nov 2001 22:51:16 GMT
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Viewed:
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589 times
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In lugnet.technic, Mark-Jan Bastian writes:
> Hello,
>
> When I see those very big cranes, I wonder how the pivoting points
> at the bottom of the large booms can hold it out. Are two or more
> beams with a technic axle enough to handle the enormous force ?
>
> I was wondering if it's possible to build thicker axles from lego,
> for example, using 2x2 round bricks with axles through them, supported
> by plates with holes and beams on the side.
>
> The 2x2 round bricks can then be supported by round corner bricks:
>
> http://guide.lugnet.com/partsref/search.cgi?q=corner+round
>
> These corner bricks have to be mounted sideways, and supported
> by sideway-mounted plates. At least 4 corner pieces are needed to
> contain a 2x2 round brick. A plate-contruction around the corner
> pieces is needed to make it all solid. The corner stones should be
> supported by bricks to the sides and underneath it.
>
> Not very usual construction, but maybe worth to experiment with.
> I don't have any round corner stones, but have seen them in
> 60..70's lego sets a long time ago.
>
> Will this idea work ?
Definitely. Although it doesn't need to rotate much, I've used such an idea on
my bridge http://www.brickshelf.com/cgi-bin/gallery.cgi?f=3057 for the main
support hinges. Also, as it only takes forces in 1 direction, I've only used 2
corner (macaroni) pieces on one side. The sections of the bridge are connected
together using #8 axles. Some of the ones near the ends of the bottom arch
chord are pretty hard to turn, indicating substantial load, but I haven't
noticed any damage to the axles or beams. Yet.
The arch is 3.6m (no I haven't weighed it yet), and meets the main hinges at
about 45 degress, so the load on them (2 each end) is about 0.35 times the
weight of the arch (each).
Regards
ROSCO
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Message is in Reply To:
 | | building thicker technic axles
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| Hello, When I see those very big cranes, I wonder how the pivoting points at the bottom of the large booms can hold it out. Are two or more beams with a technic axle enough to handle the enormous force ? I was wondering if it's possible to build (...) (23 years ago, 27-Nov-01, to lugnet.technic)
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