<VV> Broken fan belts

[John Beck]

A couple of thoughts on this:

First, Your thoughts on this are far better than mine.

Second, How long do you think it will be before Frank Burkhard tells you
to put pressure gauges before and after the blower and measure the
pressures with and without the scoop ducted to the fan?  If you did that
you could calculate how much the load on the belt is increased with the
scoop / duck... I mean duct.

Third, I wonder how much horsepower it takes to break a belt.  --J.B.

Levair at aol.com wrote:
> 
> All,
> 
> A strange problem.
>   I haven't actually thrown a fan belt in years, although sometimes they get
> so worn and so stretched that they won't follow the pulleys.
>   After a recent run in the Thomas/Roe car, I literally ripped a nearly new
> belt apart. Just broke it in two.
>    I was running without the windshield, so more air was going through the
> rear scoop. I had installed a plenum from the scoop to the fan inlet. These were
> all first time experiments.
>    I am assuming that the forced air is denser and the fan is almost pumping
> liquid.
>    I had this happen in the 70s on my race Stinger. I had plumbed two 8"
> ducts to the fan inlet from the headlight openings. I immediately broke a new fan
> belt. Removing the fan plenum temporarily solved the problem. I cured this
> later by not running a fan at all---another story.
>    I'll temporarily remove the plenum on the Orange car.
>    Any one else ever have this happen.?
> 
> Warren
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