Mailing List flyrotary@lancaironline.net Message #19911
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] Cooling Chart Was [FlyRotary] Re: rule of thumb and RV-3 sizes- was Cooling Inlet Areas/Bernie's RV9
Date: Thu, 7 Apr 2005 23:00:07 -0700
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

 Al, Interesting chart. 

Not certain I am interpreting it correctly, though.  Not certain what the X axis is related to is this the height you mention?

Yes; it is for a fixed width of 24”.  Fixed heat load corresponding to 165 hp at .5 BSFC.  X-axis is height.

Al

It appears to show that the thicker radiators produce less drag overall than the thinner radiator.  Is this for equivalent core volume or core area? Its my understanding that for the same cooling core volume the smaller surface face core will produce the less drag, is this what that is showing or the opposite?  Sorry to be slow today, I'll blame it on leaning over my Aerostars engine bay for 7 hours yesterday replacing a water pump - aches and a restless nights sleep.{:>{

By the way, I order some of those B9EQV spark plugs you mentioned to  see if they reduce the SAG interval compared to the stock plugs.

Ed A.


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