<VV> Fans and air flow

[Ron]

Right, cleaning up the fins lowers the delta P across them, may increase the 
delta P across the fan, increases the mass air flow and raises the power 
required.  Of course, as a result, the head is cooler.
RonH

----- Original Message ----- 
From: <HallGrenn at aol.com>
To: <virtualvairs at corvair.org>
Cc: <ScottyGrover at aol.com>
Sent: Wednesday, August 01, 2007 5:24 PM
Subject: Fwd: <VV> Fans and air flow


>
> In a message dated 8/1/2007 8:11:10 P.M. Eastern Daylight Time,
> ScottyGrover at aol.com writes:
>
> this  probably lowers the HP
> requirements  of a
>
>
>
>
> No, sorry, Scotty!
>
> Deflashing and minimizing the obstruction to  air flow RAISES the 
> horsepower
> the fan requires. Look at the hp/flow  data in the SAE 140C report  for
> details
>
> Scotty,  The way an engineer explained it to me when I had the same 
> "common
> sense" mind block was that with fewer restrictions and a smoother  airflow 
> the
> fan can move more air and that is more work which takes more  HP.  As an
> example when the damper doors are closed while the Corvair  engine warms 
> up the
> fan can't push as much air and less horsepower is  taken for its 
> operation.
>
> Bob Hall
> Group Corvair
> Kensington MD
> '64 Brier
> '65 Corsa
> 2 '68 Monzas
>
>
>
> ************************************** Get a sneak peek of the all-new AOL 
> at
> http://discover.aol.com/memed/aolcom30tour
>


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