<VV> fanz

[JVHRoberts at aol.com]

Do you, or anyone, happen to have the pressure vs. flow curves of this  
particular fan?
 
 
In a message dated 8/1/2005 7:18:57 P.M. Eastern Standard Time,  
bobquincy at mindspring.com writes:

Apparently the electric fan works.  Great, I say!  After 40  years we 
*should* have something better than the 1965 fan.

I have  worked with Spal and they make a good product, but they have not 
just  developed a miracle motor that makes 10x the power of previous 
offerings,  nor have they designed a miracle fan that delivers 10x the 
airflow of  other fans.  In this case the Spal unit may just coincidentally 
be a  good match for the airflow and pressure requirements of the Corvair  
engine.  That's good!  Here's maybe better...

In this  conversion from mechanical to electrical back to mechanical there 
are  losses and they all show up in the form of heat, heat which is 
introduced  into the airstream.  Heat which is not needed and can be  avoided.
Since the Spal motor is not magic, the great improvement must be  the fan 
design (and I believe it is) so *why can't we mount the Spal fan  blade on 
our current fan bearing and drive it with our belt, saving the  conversion 
losses and getting even better performance?*

The motor  only takes less than 1/2 HP so our current belt wouldn't even 
notice the  load, belt life would be great and the engine would stay even  
cooler.  Plus we can drive the fan with 2 or 3 HP if  required!

One downside with electric fans is the life, they are not  made to run 
continuously.  In a radiator application this is ok, and  1000 hour life may 
give 150,000 miles of operation with the intermittent  use.  In continuous 
operation we may only get 30,000 miles although  that is a lot for most 
Corvairs since many are not daily  drivers.


boB