Subject:
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Re: Studless Truss Design?
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Newsgroups:
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lugnet.technic
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Date:
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Sun, 1 Mar 2009 22:41:37 GMT
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Viewed:
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19948 times
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In lugnet.technic, Mike Hatton wrote:
> In lugnet.technic, Timothy P. Smith wrote:
> > In lugnet.technic, Philippe Hurbain wrote:
> > > In lugnet.technic, Timothy P. Smith wrote:
> > > > I figured a studless truss couldn't be too hard to build, and it would use up
> > > > some of these dang liftarms... but I can't seem to get a decent design.
> > > >
> > > > Has anybody done such a thing? Links/pics appreciated.
> > >
> > > What about Parax's tower crane?
> > > (http://www.brickshelf.com/cgi-bin/gallery.cgi?i=3512659)
> > >
> > > Philo
> >
> > Good start, though it takes some exotic pieces.
> > Seems like Lego should make a piece that joins liftarms end-to-end. I'm sure i'm
> > not the only person that would use it.
>
>
> Tower Crane Boom is beam and pin only.
> http://www.brickshelf.com/gallery/Parax/TowerCrane-2008/CAD/boom.lxf
>
> Tower uses multiple dimension connectors as it requires torsional stiffness.
> http://www.brickshelf.com/gallery/Parax/TowerCrane-2008/CAD/tower-sec.lxf
>
> You will need 'exotics' to connect dimensions. Thats how studless works best.
> The beams only have holes in one direction = one dimension of connectivity.
>
> I think that more connector pieces are needed..I'm sure we'll see some
> eventually..
>
> Parax.
Neither of those files seems to contain anything- but I understand what you are
saying. I thought I was on to something with some Technic Triangles as
right-angle connectors and pinned beams on diagonals. Worked fine, I guess- but
needed stiffening at right angles.
So then I went to use some 90-degree bent liftarms, and some of these:
http://www.bricklink.com/catalogItemPic.asp?P=32184
But I need ones that have pin holes, or a 3L axle pin.
I guess fundamentally I just don't grok studless building. Nearly everything I
try, either the pieces don't go that way, or they are incredibly rare, or the
geometry is wrong.
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Message has 2 Replies:
 | | Re: Studless Truss Design?
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| I put this together last year for the sydney train club. It uses pretty common parts. (URL) The big problem with studless building is the amount of clutching you get from the connector pins. In this bridge i jammed tiny bits of flex-tube in the (...) (16 years ago, 2-Mar-09, to lugnet.technic, FTX)
| | | Re: Studless Truss Design?
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| (...) Perhaps I should have said they Are Lego Digital Designer Files.. They were hosted as LXF Files but if you get a zip file then either save and rename back to .lxf or open the zip and then open the lxfml file into LDD. you can get LDD from (...) (16 years ago, 6-Mar-09, to lugnet.technic)
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Message is in Reply To:
| | Re: Studless Truss Design?
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| (...) Tower Crane Boom is beam and pin only. (URL) uses multiple dimension connectors as it requires torsional stiffness. (URL) will need 'exotics' to connect dimensions. Thats how studless works best. The beams only have holes in one direction = (...) (16 years ago, 1-Mar-09, to lugnet.technic)
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