Re: CFM and RQ Gaps

["Paul Mathus" <pmathus-at-learningco-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

     I use a 120 cfm muffin fan on my RQ/TCBOR gap, as it was the biggest 
     AC one i could find at the time.  The location of the airflow should 
     be a function of what you are trying to achieve.  If you blow through 
     the tubes, all you're getting is cooling.  If you blow through the 
     gaps, you're getting quenching as well.  I think you will be 
     hardpressed to put too much air through this type of gap unless you 
     use some sort of leafblower/compressor system.
     
     paul


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Subject: CFM and RQ Gaps
Author:  Tesla List <tesla-at-pupman-dot-com> at INTERNET
Date:    6/5/00 8:11 AM


Original Poster: "Ted Rosenberg" <Ted.Rosenberg-at-radioshack-dot-com> 
     
     
Hello all: 
     
I do not believe the subject of Cubic Feet per Minute figures for those who 
build coils using a static gap has been mentioned.
     
My coil, well into construction, will use a 15KV/60 NST. 
My gap, just finished yesterday, uses 9, 1-3/4 copper sweat couplers in a
"Scot 
D-Jochin" zig-zag arrangement. BTW, once this works, I have some neat
shortcuts 
for building such a gap.
     
But, I obviously need to blow some air on this zig-zag and the question is how 
much air? 
Many discuss the electronics of the coil in detailed numbers. But I cannot 
recall anyone throwing a CFM figure around. 
     
I can install anything from a vac motor to a couple of small 12VDC or 110VAC 
fans. 
But the CFM ratings available are all over the place. You can buy 20CFM to 
almost 200CFM. 
Where do you start? 
Unlike some who might have some fans in an old junk box, I plan to buy them. 
     
And while on this subject, is it absolutely required that the airflow NOT just 
go down the length of the tubes but rather across and out slots cut in the 
support slabs?
     
Comments are very welcomed. 
With thanks to all to let me get this far! 
     
Ted R