Mailing List flyrotary@lancaironline.net Message #21326
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Re: Static MAP readings?
Date: Tue, 03 May 2005 14:17:18 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Russell Duffy wrote:

I'm not sure that the absolute MAP numbers that you quoted are of any value. What is important IMO is the difference between the atmospheric pressure and the MAP. I am shooting for the same value for atmospheric and MAP.   You're right of course Jim.  If I were looking at tenths of an inch of pressure, I would worry about the atmospheric.  I think we can safely assume standard 29.92" atmospheric for the purposes of looking for multiple inches of missing pressure.  I will try to note the altimeter reading next time, and it's certainly dialed into my altimeter from Sunday still, so I can even look at what it was when I collected these numbers.     Rusty
 

Doesn't pressure go down with an increase in velocity?  Is there any way you could take readings with just a blower moving air through with no restrictions?

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