>> ^quantumushroom:

WITCHCRAFT!!!


burn it with fire !!! lol

You know... that actually helped... thanks!...

In reply to this comment by Payback:
>> ^Januari:
Hmmm really hate this video....
Because even after watching it... i'm at a complete loss as to explain it... Geometry and Math never really been my particular thing... but still... feel just very dumb watching this...


There are two planes, the book, and the table.
When a point plants itself on the table, the book "rolls" along the opposite curved surface.
When the book gets to the end of a curve, it becomes a point, and then the table "rolls" along the opposite curved surface.

One thing; both planes MUST be parallel. As soon as the book is tilted or there's a floor flaw in the table, it fails to work.

Also, just because they have constant width doesn't mean their centre of gravity remains at constant height. They'd make for very wobbly balls -- or wheels.

*quality discovery, @Stonebreaker!

>> ^ravioli:

How would a bowling ball shaped like this behave??


Well if it was shaped like this then it wouldnt be a bowling ball now would it ? If say, you where to use the material and manufacturing process used in making bowling balls, had one made in this manner, then it would be a much heavier version and when rotating have much more momentum. other then that. it'd be the same yet heavier.

>> ^Januari:
Hmmm really hate this video....
Because even after watching it... i'm at a complete loss as to explain it... Geometry and Math never really been my particular thing... but still... feel just very dumb watching this...


There are two planes, the book, and the table.
When a point plants itself on the table, the book "rolls" along the opposite curved surface.
When the book gets to the end of a curve, it becomes a point, and then the table "rolls" along the opposite curved surface.

One thing; both planes MUST be parallel. As soon as the book is tilted or there's a floor flaw in the table, it fails to work.

Your video, An Explanation of the Solids of Constant Width Shape, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Great! This *music is perfect for chatting up a gorgeous girl with my witty banter about constant width. =P

Congratulations! Your video, Solids of Constant Width, has reached the #1 spot in the current Top 15 New Videos listing. This is a very difficult thing to accomplish but you managed to pull it off. For your contribution you have been awarded 2 Power Points.

This achievement has earned you your "Golden One" Level 18 Badge!

>> ^Ryjkyj:

My brain just shut down.


I don't have one to shut down! *wheels (almost)

You said Wankel.>> ^rottenseed:

>> ^arvana:
They remind me of the Gömböc, but with quite a different function.

Me too...
A Wankel-Rotor is NOT a Reuleaux Triangle!

I just posted this video that does a great job of explaining this shape:

http://videosift.com/video/An-Explanation-of-the-Solids-of-Constant-Width-Shape

>> ^arvana:

They remind me of the Gömböc, but with quite a different function.

Me too...

A Wankel-Rotor is NOT a Reuleaux Triangle!

Your video, Solids of Constant Width, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

>> ^TheFreak:

Isn't Wankel feeling rather smug right about now.


I thought the same thing, and Wikipedia greeted me with this:

"The rotor of the Wankel engine is easily mistaken for a Reuleaux triangle but its curved sides are somewhat flatter than those of a Reuleaux triangle and so it does not have constant width. "

Source (English translation) http://translate.google.de/translate?u=http%3A%2F%2Fwww.der-wankelmotor.de%2FTechniklexikon%2Ftechniklexikon.html&sl=de&tl=en&hl=de&ie=UTF-8

I'm still partial to the reference though.