X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 890695 for flyrotary@lancaironline.net; Tue, 20 Dec 2005 20:57:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-025-165.carolina.res.rr.com [24.74.25.165]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id jBL1v84p022336 for ; Tue, 20 Dec 2005 20:57:09 -0500 (EST) Message-ID: <002b01c605d1$dc231bf0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Tracy, Ed, delta T Date: Tue, 20 Dec 2005 20:57:12 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01C605A7.F3119190" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0028_01C605A7.F3119190 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Monty, never measured the drop across my cores, but would reasonably = assume they are probably close to what Tracy measure. However, others = have reported more modest delta Ts across their cores. I believe either = Todd or Perry Casson took such measurements. Ed A ----- Original Message -----=20 From: Monty Roberts=20 To: Rotary motors in aircraft=20 Sent: Tuesday, December 20, 2005 8:36 PM Subject: [FlyRotary] Tracy, Ed, delta T Tracy and Ed, I was looking at an earlier post where Tracy listed air delta T across = his evap cores in cruise as 70-80F. How much increase in DeltaT do you = see with altitude? I would assume it would increase since the air is = both colder, and thinner. A 10 deg deltaT change makes a substantial = difference when sizing an intake. Monty ------=_NextPart_000_0028_01C605A7.F3119190 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Monty, never measured the drop across my cores, = but would=20 reasonably assume they are probably close to what Tracy measure.  = However,=20 others have reported more modest delta Ts across their cores.  I = believe=20 either Todd or Perry Casson took such measurements.
 
Ed A
----- Original Message -----
From:=20 Monty=20 Roberts
Sent: Tuesday, December 20, = 2005 8:36=20 PM
Subject: [FlyRotary] Tracy, Ed, = delta=20 T

Tracy and Ed,
 
I was looking at an earlier post = where Tracy=20 listed air delta T across his evap cores in cruise as 70-80F. How much = increase in DeltaT do you see with altitude? I would assume it would = increase=20 since the air is both colder, and thinner. A 10 deg deltaT change = makes a=20 substantial difference when sizing an intake.
 
Monty
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