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Posted by Chris Case [75.36.47.14] on Thursday, February 14, 2013 at 19:07:45 :
In Reply to: Re: Flywheel posted by Tom in Indiana [216.249.74.130] on Thursday, February 14, 2013 at 14:06:23 :
One is a measure of force, the other of ummm gravity? But then they are both the same.
Basically, the force is equivalent to one ounce on a lever 1 inch long. 20 in/oz is the same force as 2 oz at 10 inches.
The flywheel would need 20 in/oz no matter it's own weight, the balancing is to make up for a 20 in/oz unbalance to the crank.
If you know where to lighten it, you can goggle a chart for the weight of iron removed with various drill bits, including the 118 degree point.
The lighter flywheel will rev faster.