LinkBack URL
About LinkBacksRounding a rock. Anyone know why?
Previously: Bread dough rounding machine - GIF
Rounding a rock. Anyone know why?
Previously: Bread dough rounding machine - GIF
New: BuildThreads.com - 300+ build posts/day (with photos)
Clockguy (Aug 26, 2018), MIGuy (Aug 27, 2018), PJs (Aug 22, 2018), Scotsman Hosie (Mar 2, 2019), Seedtick (Aug 21, 2018), that_other_guy (Aug 26, 2018), volodar (Feb 16, 2020)
Capital for the top of a column or ornament for top of temple "steeple"?
---
Regards, Marv
Smart phones are to people what laser pointers are to cats
Homo sapiens is a goal, not a definition
You know that human chess game they stage in Italy...
https://www.italybyevents.com/en/eve...ame-marostica/
Well, the stone ball is for the upcoming British snooker version of that game.
Last edited by mklotz; Aug 21, 2018 at 02:30 PM.
---
Regards, Marv
Smart phones are to people what laser pointers are to cats
Homo sapiens is a goal, not a definition
It would be good to know how rough the original stock was.
I like this. Looks like a good cash job for poor students.
Extreme crocket?
In China, they will use those round ball rocks in a fountain, and the pressure of the water will make the ball rotate freely in any direction. You see them in many hotel and restaurants in the lobby area or in stairwell's.
I have seen these many times when I lived in China for 5.5 years.
https://en.wikipedia.org/wiki/Kugel_fountain
I've seen spherical granite about the size used as an ornament in Western Australia, the rock rests in a concave spherical "dish" of the same diameter (well almost) into which a supply of water is introduced. When the water flows the sphere turns, almost without friction and will continue to rotate randomly for a very long time. The ball can be stopped by hand, with difficulty, then will slowly commence to rotate. It's fascinating to watch, and will keep kids amused for what seems like ages. I was certainly intrigued for a while. Can dig out photos if anyone is interested, but I don't think I have video.
Watching vids about it is keeping us old farts amused!Originally Posted by Bony
PJs (Nov 8, 2018)
2 very good answers involving, of all things, water!! Who would have guessed that a stream of water, being fluid, would be able to lift and rotate a solid round rock weighing many hundreds of pounds?? Man, ya just can't make up a story like that!!
Plus, it beats my guess up one side and down the other! ............... What? ....... What was my guess?
Well, it's faster and very much easier than chiseling a really Big rock into a perfect cube?
Do the math: An 18" diameter of water at 10 PSI will support 2500 pounds.
Carl.
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks