[SEL] Hercules XK revisited

[Curt Holland]

Tom,
On my 6HP flywheels there are the 3 holes about 3" in diameter. Very 
near the split hub is another smaller hole about an 1 1/2 in diameter 
that serves the same purpose you mention for the expansion/contraction.
What HP are you looking at? You can see the smaller holes in this picture:
http://www.oldengine.org/members/holland/images/6Hercules/Flywheels/P4170006c.jpg
Curt Holland
Gastonia, NC

Germoamer at aol.com wrote:

>While in one of the outbuildings this morning, I stopped and looked at a 
>Hercules XK and studied the 3 hole flywheels.  A thought as to why they are there 
>came to me, and you have to understand by brain to appreciate the significance 
>that!  The flywheel hub is split with a bolt to hold onto the crank with a 
>straight key.  The split is directly centered in one of the flywheel holes.  
>Would not that hole then be there to permit minor expansion/contraction of the 
>flywheel as it is tightned/loosened on the crankshaft?  The other two holes 
>would then be there to balance the flywheel, or also to permit 
>expansion/contraction.  
>
>  
>