<VV> alternate fans

[jvhroberts at aol.com]

 If it doesn't cool sufficiently at full power, no control in the world will be of any good. 

 

John Roberts
 

 

-----Original Message-----
From: ScottyGrover <ScottyGrover at aol.com>
To: jaysplace <jaysplace at laserpubs.com>
Cc: virtualvairs <virtualvairs at corvair.org>
Sent: Sun, Mar 17, 2013 2:04 pm
Subject: Re: <VV> alternate fans


No pipe dream--the circuitry for controlling a small electric motor exists  
and is rather simple; rigging it to use a CHT measuring device might be 
more  difficult but a powerful motor is in service--ask Mel Francis about this. 
Also, Corvair Specialties has for sale an electric-motor-driven setup which 
 could be installed and the motor controlled from the CHT.  
 

Scotty from Hollyweird
 
.
 
 
In a message dated 3/17/2013 12:58:11 A.M. Pacific Daylight Time,  
jaysplace at laserpubs.com writes:

as  always, there are multiple factors to consider:
- how much pressure  differential can the proposed fan(s) develop at the 
required airflow?
-  a fan might work better pulling than pushing because the turbulence  
created by the fan doesn't have to straighten out to go through  fins.
(electric fans on water pumpers work better pulling than pushing, I'm  told)

i expect that most 'fans' develop almost zero pressure  differential. I 
imagine they would help a bit more than that.

If  you could take a Corvair (or other) blower that would supply more 
than  enough volume and pressure, then drive it with a variable ratio 
system  (like snowmobile?) and control ratio by head temp?
Then you'd never waste  power by pumping more air than needed, and always 
have enough  cooling.

Oh, well - pipe dreams, my specialty!

--  
Jay


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