Comments on: #2056: RollMould http://iotd.patrickandrews.com/2012/07/28/2056-rollmould/ Invention Of The Day Mon, 20 May 2013 10:28:36 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: rob tillaart http://iotd.patrickandrews.com/2012/07/28/2056-rollmould/comment-page-1/#comment-1006603 rob tillaart Tue, 31 Jul 2012 05:54:57 +0000 http://iotd.patrickandrews.com/?p=14354#comment-1006603 Yes, #353 is a nice example. Changing the form of the wheel with speed can be done by adding “weights” in the wheel and using gravity and centrifugal forces.
High speed would make the wheel rounder (centrifugal force on weight)
Low speed would make the wheel flatter (gravity => weights drop)
No detailed design in mind yet ;)

]]> By: Patrick http://iotd.patrickandrews.com/2012/07/28/2056-rollmould/comment-page-1/#comment-1006581 Patrick Mon, 30 Jul 2012 19:50:31 +0000 http://iotd.patrickandrews.com/?p=14354#comment-1006581 Hi Rob,
One of the problems is that the wheel would benefit from more contact area during acceleration but when rolling at high speed you want to reduce that area. Varying the tyre pressure systematically might be interesting.
Here is another one I thought up earlier !
http://iotd.patrickandrews.com/2007/11/08/hybride/
Cheers,
P

]]> By: rob tillaart http://iotd.patrickandrews.com/2012/07/28/2056-rollmould/comment-page-1/#comment-1006578 rob tillaart Mon, 30 Jul 2012 19:38:31 +0000 http://iotd.patrickandrews.com/?p=14354#comment-1006578 Hi,
A lot of your inventions (did not check them all) are about bicycles / wheels. Did you never wondered why a bicycle wheel is so big compared to the small patch that hit the road at any moment.

Imagine a wheel looking like not a circle but more like an ellipse
or abit like the chain

(excuses for the limitations of the ascii -set ;) () the vertical ellipse or a diagonal ellipse or the triangle tube or a tube folded in harmonica style, there can be so many wheels

Would special formed wheels give an advantage on certain terrains? Are the easier to replace?

Have fun!
Rob

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