Mailing List flyrotary@lancaironline.net Message #4947
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: Streamline Vs Parabolic Ducts/Diffusers
Date: Wed, 24 Dec 2003 14:32:24 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
----- Original Message -----
Sent: Wednesday, December 24, 2003 1:23 PM
Subject: [FlyRotary] Re: Streamline Vs Parabolic Ducts/Diffusers

Reply #2..      
  Ed,  Are you sure the labels are not backwards on the two duct pressure recovery charts?
 
Tracy
 
 
 
 Labels are correct, however, I used two different Y scales for the dynamic pressure on the two charts.  The dynamic pressure values are correct but the unequal scales appear to give the parabolic curve the greater dynamic pressure recovery, when in reality it is the streamline duct.
The Y axis on the right is for dynamic pressure.
 
 
I just posted the two charts with their dynamic pressure scales equal and I think it is clearer now.
 
Ed Anderson
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