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Anything you can do to reduce the power and therefore heat your engine is developing will reduce the BTU of waste heat your cooling system must deal with. Leaning would reduce the heat load - but, whether sufficiently to materially affect your cooling is another story. My calculations shows the following:
Rpm A/F ratio Fuel Flow BTU
1000 12:1 2.9 1417
1000 14.7 2.3 1157
1000 17.4 2.0 987
However, keep in mind that at lower idle RPM you need a richer mixture to keep the engine turning over, so you can not lean the engine as much at idle as you can up in the air at cruise.
My 0.02 worth
Ed
----- Original Message ----- From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, June 15, 2006 11:01 AM
Subject: [FlyRotary] Re: Remove Turbo
Steve Brooks wrote:
What if you are in line on really hot day? You might not even get 2 min of
max power.
I would rather err on the wild side of cooling - you always can cut down
and close off, once you know your ride...
Are there alternatives to keep things cooler while sitting in line? Would an extremely lean mixture make a difference?
-- ,|"|"|, Ernest Christley |
----===<{{(oQo)}}>===---- Dyke Delta Builder |
o| d |o http://ernest.isa-geek.org |
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Homepage: http://www.flyrotary.com/
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