[Healeys] Stock Cooling Fan CFM

[Perry]

Listers
About a month ago I posted to the list looking for a verification of a CFM calculation of the  stock 4 blade fan on a 100.   
Bill Atterbury responded that my numbers looked like they were off by a factor of 10. Bill was correct. 
After revisiting the question it looks like the CFM should be approximately:
Fan specs: 	Pitch= 1-1/8 inch 
       Overall diameter=14.75 inches 
CFM @ 700 RPM =310 CFM
CFM @1000 RPM =444 CFM
CFM @4000 RMP= 1776 CFM

So if you wonder why a small 12 inch electric fan that puts out 1250 CFM (FlexALite#111) seems to cool the 100 a lot better at idle
this may help to explain it, unless of course I have made another mistake. 
Thanks
Perry

Sent from Mail for Windows 10

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