X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: (direct reply)\eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from fed1rmmtao11.cox.net ([68.230.241.28] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 861397 for flyrotary@lancaironline.net; Fri, 08 Apr 2005 02:00:51 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.28; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao11.cox.net (InterMail vM.6.01.04.00 201-2131-118-20041027) with ESMTP id <20050408060003.XXEP22013.fed1rmmtao11.cox.net@BigAl> for ; Fri, 8 Apr 2005 02:00:03 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Cooling Chart Was [FlyRotary] Re: rule of thumb and RV-3 sizes- was Cooling Inlet Areas/Bernie's RV9 Date: Thu, 7 Apr 2005 23:00:07 -0700 Message-ID: <000001c53c00$371e8220$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C53BC5.8ABFAA20" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C53BC5.8ABFAA20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Al, Interesting chart. =20 Not certain I am interpreting it correctly, though. Not certain what = the X axis is related to is this the height you mention? Yes; it is for a fixed width of 24". Fixed heat load corresponding to = 165 hp at .5 BSFC. X-axis is height. Al It appears to show that the thicker radiators produce less drag overall = than the thinner radiator. Is this for equivalent core volume or core area? = Its my understanding that for the same cooling core volume the smaller = surface face core will produce the less drag, is this what that is showing or = the opposite? Sorry to be slow today, I'll blame it on leaning over my Aerostars engine bay for 7 hours yesterday replacing a water pump - = aches and a restless nights sleep.{:>{ By the way, I order some of those B9EQV spark plugs you mentioned to = see if they reduce the SAG interval compared to the stock plugs. Ed A. _____ =20 >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0001_01C53BC5.8ABFAA20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
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 Al, Interesting chart. 

Not certain I am interpreting it correctly, though.  Not certain = what the X axis is related to is this the height you = mention?

Yes; it is for a fixed width of 24”.  Fixed heat load = corresponding to 165 hp at .5 BSFC.  X-axis is height.

Al

It appears to show that the thicker radiators produce less drag overall = than the thinner radiator.  Is this for equivalent core volume or core area? = Its my understanding that for the same cooling core volume the smaller surface = face core will produce the less drag, is this what that is showing or the = opposite?  Sorry to be slow today, I'll blame it on leaning over my Aerostars = engine bay for 7 hours yesterday replacing a water pump - aches and a restless = nights sleep.{:>{

By the way, I order some of those B9EQV spark plugs you mentioned to  = see if they reduce the SAG interval compared to the stock = plugs.

Ed A.

>>  Homepage:  http://www.flyrotary.com/
>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

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