<VV> Fans and air flow

[ScottyGrover at aol.com]

In a message dated 8/1/2007 5:24:57 P.M. Pacific Daylight Time,  
HallGrenn at aol.com writes:

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





I stand corrected; but I got my information from ME's when I was learning  
the trade--I didn't have book learning, I just asked an awful lot of  questions. 
 



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