X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1232198 for flyrotary@lancaironline.net; Tue, 11 Jul 2006 07:49:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id k6BBmg32000411 for ; Tue, 11 Jul 2006 07:48:43 -0400 (EDT) Message-ID: <001301c6a4df$f5b526f0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Temperature control Date: Tue, 11 Jul 2006 07:48:42 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C6A4BE.6E60B190" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C6A4BE.6E60B190 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: ARGOLDMAN@aol.com=20 To: Rotary motors in aircraft=20 Sent: Tuesday, July 11, 2006 1:25 AM Subject: [FlyRotary] Re: Temperature control In a message dated 7/10/2006 4:44:50 PM Central Standard Time, = eanderson@carolina.rr.com writes: While both our temps are above the nominal recommended, I have found = that=20 for short duration, there does not APPEAR to be any problem. I know = Tracy=20 encounters (or did with the old 13B) the same conditions with no = apparent=20 problems. I think we would both feel a bit more comfortable with = temps that=20 stayed below 200F (and I do use that as my max red line for oil), = they only=20 way I know to do that is to size your coolant system for climb = conditions=20 which means it will be oversized for cruise with resulting excessive = drag. My 0.02 Ed Ed, Consider the air exhaust rather than considering the intake sizes. = Air, in a cooling system does not act the way we think it does. If it = doesn't like the flow pattern, it will stop. You can use a manometer (make it out a clear tube) to look at air = pressure differentials. Don't forget about cowl flaps. Keep cool Rich I agree, Rich. Total air flow through the system rather than inlet or = exit size is what really counts. So any undo restrictions on either = side to the cooling core can cause problems. The fact that you have one = side is done well and properly means nothing if the air flow on the = opposite side of the core is poor. Ed ------=_NextPart_000_0010_01C6A4BE.6E60B190 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 ARGOLDMAN@aol.com
Sent: Tuesday, July 11, 2006 = 1:25=20 AM
Subject: [FlyRotary] Re: = Temperature=20 control

In a message dated 7/10/2006 4:44:50 PM Central Standard Time, eanderson@carolina.rr.com=20 writes:
While=20 both our temps are above the nominal recommended, I have found that =
for=20 short duration, there does not APPEAR to be any problem.  I = know Tracy=20
encounters (or did with the old 13B) the same conditions with no = apparent
problems.  I think we would both feel a bit more=20 comfortable with temps that
stayed below 200F (and I do use that = as my=20 max red line for oil), they only
way I know to do that is to = size your=20 coolant system for climb conditions
which means it will be = oversized for=20 cruise with resulting excessive drag.

My=20 0.02


Ed
Ed,
 
Consider the air exhaust rather than considering the intake = sizes. Air,=20 in a cooling system does not act the way we think it does. If it = doesn't like=20 the flow pattern, it will stop.
 
You can use a manometer (make it out a clear tube) to look at air = pressure differentials. Don't forget about cowl flaps.
 
Keep cool
 
Rich
 
I agree, Rich.  Total air flow through the = system=20 rather than inlet or exit size is what really counts.  So any = undo=20 restrictions on either side to the cooling core can cause = problems.  The=20 fact that you have one side is done well and properly means nothing if = the air=20 flow on the opposite side of the core is poor.
 
 
Ed
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