<VV> Corvair Fan

[JVHRoberts at aol.com]

I noticed that too, Bob. But I can see the factory doing a setup to get it  
close by the way it's machined in the first place. 
I suspect this is what really happened. Get it close, so only edge nibbles  
are needed to balance it. 
 
In a message dated 7/10/2005 10:30:39 P.M. Eastern Standard Time,  
BobHelt at aol.com writes:

>  Every wonder why there are no balance weights or weigh
> balance holes  on the Corvair fan?  It was done by first spin balancing
> the fan  before any fan bearing mounting holes were drilled.  Then the
>  production machine moved the casting to the exact balance center.   The
> casting was then drilled and bored.  Apparently the process  was so good
> that a dynamic re-balance check was not needed. 
>  

I find this hard to believe. I personally have had possession of  factory mag 
fans that have had small sections removed from the periphery  obviously for 
balancing.