[Spridgets] Flywheel needed

[72spridget at gmail.com (David Lieb)]

> What are the benefits of an aluminum flywheel and how do you figure out
> how much it needs to weigh?  I know it lowers the reciprocating mass and
thus
> revs faster but what all else is figured into the equation? In short, how
> do you calculate the weight of the flywheel needed and what real world
> benefit would it provide.

I need to start drinking coffee! I read Billy's post and wondered
about aluminum flywheels, then I read Larry's post and couldn't figure
out why someone in Oshkosh b'gosh cared whether it was available in
Alabama ;-) I'm gonna go back to bed till Spring!

How can a round flywheel lower reciprocating mass???