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Double joints


Bfahome

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blog-0025436001472442789.jpgOf the sort you'd see on action figures and such. They provide a better range of articulation on, for example, a knee than a single joint would.

 

I guess this could be that in LEGO form. Obviously it's possible to do something equivalent with two ball pieces or the super-short double socket piece, but thanks to the meshing gears this would only have one degree of freedom so the motion is smooth, rather than having to position the two pivots separately. The tradeoff is it probably isn't as easy to work into a limb and it has no friction. Oh well.

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It wouldn't be too difficult to add friction, would it? Maybe not as much as a ball joint would allow, but if you use two friction pins instead of cross axles that'd be a start.

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It wouldn't be too difficult to add friction, would it? Maybe not as much as a ball joint would allow, but if you use two friction pins instead of cross axles that'd be a start.

Yeah, that could probably be done.  Not sure how it would affect the symmetry or stability of it though (and I'm too lazy to test it at the moment).

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