Go Back   This Blue Marble, a Global Current Events Discussion Forum > Our Homestead > Crafts > Other Crafts

Other Crafts A place to share your creative side: artwork, photos, crafts, or whatever tickles your fancy!

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-24-2012, 05:15 AM   #1
Oric
El Turco
 
Oric's Avatar
 
Join Date: Aug 2008
Location: Istanbul, Turkey
Posts: 8,165
Thanks: 782
Thanked 2,116 Times in 939 Posts
Default Drilling square holes

http://www.ohgizmo.com/2009/10/07/sq...blows-my-mind/
Oric is offline   Reply With Quote
Old 06-24-2012, 07:31 AM   #2
gsgs
searching for truth
 
gsgs's Avatar
 
Join Date: Sep 2008
Location: Germany
Posts: 3,739
Thanks: 3
Thanked 151 Times in 106 Posts
I remember a book from Martin Gardner in the 70s had a chapter about it

--------edit----------
http://mathworld.wolfram.com/ReuleauxTriangle.html
__________________
a chart says more than 1000 words

Last edited by gsgs; 06-28-2012 at 04:00 AM.
gsgs is offline   Reply With Quote
Old 06-24-2012, 05:23 PM   #3
Potemkin
Omne ignotum pro magnifico
 
Potemkin's Avatar
 
Join Date: Aug 2008
Posts: 27,827
Blog Entries: 3
Thanks: 109
Thanked 5,511 Times in 2,752 Posts
Looks like a cylinder in a Wankel Engine.

OK. The patent for the drill bits predates Wankel.

http://en.wikipedia.org/wiki/Wankel_Engine

It appears there are other Reuleaux polygons. http://en.wikipedia.org/wiki/Reuleaux_triangle

__________________
“The price of freedom is the willingness to do sudden battle anywhere, any time and with utter recklessness.”
― Robert A. Heinlein, The Puppet Masters
Potemkin is offline   Reply With Quote
Old 06-24-2012, 05:47 PM   #4
blue gecko
Simplify, Do or Die
 
blue gecko's Avatar
 
Join Date: Aug 2008
Location: Arkansas
Posts: 10,518
Thanks: 2,340
Thanked 4,172 Times in 1,723 Posts
Mesmorizing! As you can see I require very little to be entertained...
__________________
Life is short. Break the rules. Forgive quickly.
Kiss slowly. Love truly. Laugh uncontrollably,
and never regret anything that made you smile.


Women are Angels and when someone breaks our wings we simply continue to fly...on a broomstick. We are flexible like that
blue gecko is offline   Reply With Quote
Reply

Tags
drilling, holes, square

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:59 AM.


Powered by vBulletin®
Copyright © Jelsoft Enterprises Ltd.