<VV> Electric cooling fan results

[JVHRoberts at aol.com]

It takes pressure to get the air through the engine, the more pressure, the  
more flow. And it's flow that does the cooling. 
 
In a message dated 7/30/2007 1:35:52 A.M. Eastern Daylight Time,  
AeroNed at aol.com 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