Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2904199 for flyrotary@lancaironline.net; Wed, 24 Dec 2003 14:35:15 -0500 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id hBOJZCAc001323 for ; Wed, 24 Dec 2003 14:35:14 -0500 (EST) Message-ID: <001d01c3ca54$a89c8740$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Streamline Vs Parabolic Ducts/Diffusers Date: Wed, 24 Dec 2003 14:32:24 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001A_01C3CA2A.BF8C8380" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C3CA2A.BF8C8380 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable @carolina.rr.com ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 24, 2003 1:23 PM Subject: [FlyRotary] Re: Streamline Vs Parabolic Ducts/Diffusers Reply #2.. =20 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 ------=_NextPart_000_001A_01C3CA2A.BF8C8380 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 @carolina.rr.com
----- Original Message -----
From:=20 Tracy = Crook
Sent: Wednesday, December 24, = 2003 1:23=20 PM
Subject: [FlyRotary] Re: = Streamline Vs=20 Parabolic Ducts/Diffusers

Reply #2..      
  Ed,  Are you sure the labels are not backwards on the = two=20 duct pressure recovery charts?
 
Tracy
 
 
 
 Labels are correct, however, I = used two=20 different Y scales for the dynamic pressure on the two charts.  = The=20 dynamic pressure values are correct but the unequal scales appear to = give=20 the parabolic curve the greater dynamic pressure recovery, when in = reality=20 it is the streamline duct.
The Y axis on the right is for = dynamic=20 pressure.
 
 
I just posted the two charts with = their=20 dynamic pressure scales equal and I think it is clearer now.
 
Ed=20 Anderson
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