Posted by Øystein Rustad (217.70.229.53) on January 03, 2003 at 17:05:38:
Hello again :-)
For the ones int. I thought I should "bable" a bit about how besslers wheel was related to centrifugal forces mathematically !
In his biggest wheel we can calculate how big the centrifugal forces wore, and from that see if they somehow could be a major factor, an maybe we can find a "lucky" relation !
Lets see at what RPM the centrifugal forces will be equal to gravity !
RPM(Fg = Fc) = (g * r)^1/2 * (60 / pi*2r)
g = 9,8
r = 1,825
Resault = 22,1 RPM !
At this RPM the weights are "weightless" at the top and
have F = 2g at the bottom.
We know this wheel rotated at about 24 RPM unloaded and about 20 RPM loaded.
:-)