Sedalia Dave Posted May 26, 2020 Share Posted May 26, 2020 Wonder just how stable it really is. Link to comment Share on other sites More sharing options...
Pat Riot Posted May 26, 2020 Share Posted May 26, 2020 I am betting it's not stable at all. Link to comment Share on other sites More sharing options...
J. Mark Flint #31954 LIFE Posted May 26, 2020 Share Posted May 26, 2020 Interesting, it looks like it would be very stable to me. I would imagine it can move side to side a very small amount, but it should not be able to tip in any direction Then again, I might have welded all the chain links if I built something like that that Link to comment Share on other sites More sharing options...
Marshal Mo Hare, SASS #45984 Posted May 26, 2020 Share Posted May 26, 2020 If the chains had no slack it should be quite stable. Link to comment Share on other sites More sharing options...
Charlie Harley, #14153 Posted May 26, 2020 Share Posted May 26, 2020 Geometrically, it’s perfectly stable. In the practical world, there’s a bit of wobble. If I were the artist, the links would be welded and re-coated. Link to comment Share on other sites More sharing options...
Hardpan Curmudgeon SASS #8967 Posted May 26, 2020 Share Posted May 26, 2020 No need to weld the chains - but turnbuckles on the corner chains would be effective. Also allow for seasonal adjustments. Link to comment Share on other sites More sharing options...
Yul Lose Posted May 26, 2020 Share Posted May 26, 2020 4 hours ago, Pat Riot, SASS #13748 said: I am betting it's not stable at all. Actually they are very stable, especially the four cornered ones. Here is a three corner one that I 3D printed that is held together with thread. I’m working on one now that will be held together with 1/16” steel cable and will feature fractal wood burning, it will be a four cornered unit. The three cornered one in the picture will hold about 5Lbs. if it’s balanced correctly. The one that I’m building will hold substantially more. Link to comment Share on other sites More sharing options...
Pat Riot Posted May 26, 2020 Share Posted May 26, 2020 What keeps them from moving side to side? They look like they would swing. Link to comment Share on other sites More sharing options...
Yul Lose Posted May 26, 2020 Share Posted May 26, 2020 4 minutes ago, Pat Riot, SASS #13748 said: What keeps them from moving side to side? They look like they would swing. Tension. Link to comment Share on other sites More sharing options...
Wallaby Jack, SASS #44062 Posted May 26, 2020 Share Posted May 26, 2020 my guess would be that any movement would be the result of flex in the support frame. Link to comment Share on other sites More sharing options...
Yul Lose Posted May 26, 2020 Share Posted May 26, 2020 1 minute ago, Wallaby Jack, SASS #44062 said: my guess would be that any movement would be the result of flex in the support frame. To a certain degree you are correct. If you’ll notice the two arms in the interior of the blue one that I posted are quite flexible, they are 3D printed after all. When you press down on the top, with your finger or thumb in pretty much the exact center you can see the arms flex. The table in the original OP would have very little flex in that square tubing. If it were built with just two arms in the center there would be much more flex or movement. The chain links are pulling against each other in the four corners and the two opposing chain sections. They call this an impossible table. Most people will look at it and think that the links are welded together right off the bat but they aren’t. There are some Pinterest posters that feature some very interesting impossible tables. Link to comment Share on other sites More sharing options...
Cliff Hanger #3720LR Posted May 26, 2020 Share Posted May 26, 2020 What I see is a table that may be stable side to side but it may become a swing long end to loong end. Link to comment Share on other sites More sharing options...
Injun Ryder, SASS #36201L Posted May 26, 2020 Share Posted May 26, 2020 Looked them up on Youtube (tensegrity tables). Might have to try to make a simple one. ( I am no woodworker! To those that have the old Bill Cosby records, my woodworking skills are similar - put two grooves in it and call it an ashtray). Link to comment Share on other sites More sharing options...
Sedalia Dave Posted May 27, 2020 Author Share Posted May 27, 2020 Thanks Injun Ryder, now that I know what it is called. I found a couple videos on the picture I originally posted. Plans for the table https://docs.google.com/document/d/1-0KAVSyX-IyUFedDS_ATKh06YaANolAL3sAp1feRGys Link to comment Share on other sites More sharing options...
Pat Riot Posted May 27, 2020 Share Posted May 27, 2020 Okay. So it moves like I thought it would. Maybe not a sway but it does move. Something I find annoying in tables. Link to comment Share on other sites More sharing options...
Marshal Mo Hare, SASS #45984 Posted May 27, 2020 Share Posted May 27, 2020 If the chains are all the same length, a lot of movement is possible. But as the difference between the middle chains’ length and the length of the outer chains’ length give it rigidity. Link to comment Share on other sites More sharing options...
Forty Rod SASS 3935 Posted May 27, 2020 Share Posted May 27, 2020 2 hours ago, Pat Riot, SASS #13748 said: Okay. So it moves like I thought it would. Maybe not a sway but it does move. Something I find annoying in tables. Likely really annoying if you've been tippling a bit. Link to comment Share on other sites More sharing options...
Marshal Mo Hare, SASS #45984 Posted May 27, 2020 Share Posted May 27, 2020 If you put a couple pitchers on one corner, it could be really annoying. Link to comment Share on other sites More sharing options...
Pat Riot Posted May 27, 2020 Share Posted May 27, 2020 One could put bells on it. It would give you a few seconds warning of an earthquake. Link to comment Share on other sites More sharing options...
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