Hyperboloids

[tankerwife]

Wake up babe new George Hart just dropped

[RADMAN]

Great work again, George! You have an amazing ability for turning the intangible, tangible.

[davidalanjonesridge]

I discovered polyhedra around 1995, and I have revisited it sporadically over the years. There are three that I invariably keep coming back to and Mr. Hart is one of them. Some of the tricks that he has discovered are stunning. Like cutting slits in playing cards and other media. A suggestion that I have desired to have is for Mr. Hart to put his whole website distributed in PDF format, please. The others are: Father Magnus J. Wenninger OSB, and Gijs Korthals Altes.

[DeclanMBrennan]

Another method I've seen in a museum somewhere. Imagine a pair of miniature wagon wheels with their axle arranged vertically. Have many small holes in the wheel rims with elastic cord between them taking the shortest vertical path.
Twist one of the wheels relative to the other and watch the surface change from a cylinder to a hyperboloid.

[MrMacGaunaa]

I have to say: that’s a pretty nice video!

[wavebreakerr]

Oooh! I'm excited! You make such cool stuff

[noslowerdna]

Keen craftiness! Would love to see them spinning fast (like a diabolo) from both the short side and long side perspective.

[OrigamiMarie]

I have just gotten access to a laser cutter, I am tempted to make the wood one. Not sure what I would do with it though.

[DeclanMBrennan]

Fed up? Find Hart where Math meets Craft. 🙂

[maxwellzavala]

I would love to have a conversation with you about topology.

[kristinedraws]

Now I just need to understand why they’re called ruling lines?

[frechjo]

And who doesn't like hyperboloids?