A new pyramid-like shape always lands the same side up
quantamagazine.org
A new pyramid-like shape always lands the same side up
1–10 of 175 posts
Re: A new pyramid-like shape always lands the same side up
#2maybe they should build moon landers this shape :-)
Re: A new pyramid-like shape always lands the same side up
#3Somewhat disappointing that it won’t work with uniform density. More surprising it needed such massive variation in density and couldn’t just be 3d printed from one material with holes in.
Re: A new pyramid-like shape always lands the same side up
#4A reminder that simple inventions are still possible.
Re: A new pyramid-like shape always lands the same side up
#5Reminded me of Gömböc[0]
Re: A new pyramid-like shape always lands the same side up
#6Reminded me of Gömböc[0]
Mentioned in the article.
Re: A new pyramid-like shape always lands the same side up
#7Somewhat disappointing that it won’t work with uniform density. More surprising it needed such massive variation in density and couldn’t just be 3d printed from one material with holes in.
That implies the interesting question though, which shape and mass distribution comes closest to, or would maximize relative uniformity?
Re: A new pyramid-like shape always lands the same side up
#8maybe they should build moon landers this shape :-)
That is indeed the example they mention in the paper https://arxiv.org/abs/2506.19244.
Re: A new pyramid-like shape always lands the same side up
#9It'd be nice to see a 3d model with the centre of mass annotated
Re: A new pyramid-like shape always lands the same side up
#10It'd be nice to see a 3d model with the centre of mass annotated
We can safely assume the center of mass is the center [0] of the solid tungsten-carbide triangle face... or at least so very close that the difference wouldn't be perceptible.