Mailing List flyrotary@lancaironline.net Message #2449
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Re: Cooling / Pressure recovery
Date: Thu, 07 Aug 2003 22:42:32 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Tracy Crook wrote:

    Here's the thing that makes it confusing.  If you look only at
    cooling results,  Paul was right.  I could have gotten equal or
    better cooling improvement by using a cowl flap.  BUT,  this
    improvement comes at the expense of added drag, especially at cruise
    & top speed (racing).  By improving the pressure recovery instead, I
    got the improved cooling with almost no increase in cooling drag.     This is the ultimate goal in aircraft cooling design.
         Tracy Crook


How can you tell, Tracy?  That is to say, is opening up the intake producing more drag than a cowl flap would?  How do you measure the effects of both so that your not just guessing?

--
----Because I can----
http://www.ernest.isa-geek.org/
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