<VV> Fan Belt Physics

lonwall@corvairunderground.com corvairs at pacifier.com
Mon Jul 1 16:24:11 EDT 2013

This is a long complicated issue - because people make it that way -

Is the belt too tight?
Is it the right belt? (Dimensionally - NOT brand)
Is he putting the same belt back on he just flipped?
Is he running a magnesium fan?
Is he running an alternator or generator?
If an alternator is he -
Certain that he has a 3"  diameter pulley?
That he has an alternator adapter casting?
Is the balancer coming apart or are any pulleys bent?

When all things are the way they should be he should normally get years 
of use on a stock motor.

If he drives like a maniac or races then he needs our spring loaded 
idler. Only 7 left.

If any of the above items are wrong then our spring idler will not fix them.

Lon Wall

On 7/1/2013 11:57 AM, paulsiano at yahoo.com wrote:
> I'm asking for a friend who keeps flipping fan belts on his Corvair at higer rpms.
> Where does the flip begin?  Is there some sort of standing wave that develops at a particular rpm at a particular physical point?  If the flip always begins at the same place, could an enclosure (guide) prevent the problem?
> I've had at least one Corvair continously since 1964 but not a Corvair engine for a very long time.  I apologize if I'm asking a question that has an answer that is common knowledge.
> Any thoughts will be appreciated.
> Paul Siano
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