<VV> Electric cooling fan results

[AeroNed at aol.com]

In a message dated 7/29/2007 10:59:25 P.M. Central Daylight Time,  
r.gault at sbcglobal.net writes:

Does the  911 fan even put out enough pressure to cool
the  Corvair?



Argh!!!! Pressure is NOT what does the cooling, it is air flow. Think of it  
this way...If the shrouds were totally sealed so no air could get out the fan, 
 any fan would pressurize this vessel. That pressurized air would do 
absolutely  nothing to cool whatever is in it. The pressure is what enables the air to 
flow  though. It is more difficult to measure airflow directly. You can, 
rather  easily, measure the pressure between two locations (or relative to another 
 position) to calculate the air flow. Also fans are typically rated in 
pressure  capability and air flow as a measure of the fan's efficiency (ie when it 
starts  churning the air rather than moving it).
 
Ned



************************************** Get a sneak peek of the all-new AOL at 
http://discover.aol.com/memed/aolcom30tour