[Healeys] Stock Cooling Fan CFM

[WILLIAM B LAWRENCE]

Sounds more realistic. And remember that while the fan is moving that air it is soaking up power. I much prefer my electric fans.

Bill Lawrence
BN1 #554
________________________________
From: Healeys <healeys-bounces at autox.team.net> on behalf of Perry via Healeys <healeys at autox.team.net>
Sent: Thursday, June 25, 2020 2:00 PM
To: healeys at autox.team.net <healeys at autox.team.net>
Subject: [Healeys] Stock Cooling Fan CFM


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



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