Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 602289 for flyrotary@lancaironline.net; Mon, 10 Jan 2005 15:46:48 -0500 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-069-132-111-212.carolina.rr.com [69.132.111.212]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j0AKkTkd029576 for ; Mon, 10 Jan 2005 15:46:30 -0500 (EST) Message-ID: <002601c4f755$7cb516e0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Flattened Fins (not Finn) : [FlyRotary] Re: Oil cooler baffles Date: Mon, 10 Jan 2005 15:46:40 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0023_01C4F72B.93AA9160" 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_0023_01C4F72B.93AA9160 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageJohn, Mark has a very good point. I also found that a power = washer will not only clean your aircraft and engine compartment just = fine, but will also provide hours of later "enjoyment" combing straight = the flatten fins in the radiators and cooler. I believe I learned = this the same way Mark did. {:>) Ed Anderson ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Monday, January 10, 2005 2:09 PM Subject: [FlyRotary] Re: Oil cooler baffles John,=20 You didn't happen to "power-wash" your a/c lately? That will flatten = the fins on a heat-exchanger in a hurry. Don't ask how I learned this. = =20 Mark S. =20 =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of John Slade Sent: Monday, January 10, 2005 12:31 PM To: Rotary motors in aircraft Subject: [FlyRotary] Oil cooler baffles =20 Rotarians, First an admission: A couple of days ago I took off with the landing brake down. I only = have the NACA scoop, so the engine was getting very little air. By the = time I was downwind the temps were outrageous. Coolant got to 270 and = oil to 260. Needless to say I glided to a landing (on the runway) at = idle. Thankfully the engine seems no worse for the experience. Oil = pressure is ok to good and static rpm is unchanged. I flew again today = (landing brake up) and temps were tolerable, but higher than I used to = have long ago, in hotter weather before the new turbo and the rebuild. =20 =20 Now the question: Looking at my two stock 3rd gen oil coolers after landing I noticed = something strange - most of the thin aluminum baffles between the oil = channels are all bent flat, blocking the air flow. Those that aren't = bent are toward the lower edge of the cooler where airflow might well be = less. They're all bent the same in an even pattern that would indicate = to me that this was either done by one of those crop circle guys on his = day off, of the high pressure air from the scoop hitting the coolers at = an angle.=20 =20 Has anyone else seen this? I know I can "comb" the aluminum straight = again, but will it just happen again?=20 Should put a baffle in the air stream to angle the air somehow? =20 John (baffled) =20 =20 =20 =20 ------=_NextPart_000_0023_01C4F72B.93AA9160 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
John, Mark has a very good point.  = I also=20 found that a power washer will not only clean your aircraft and engine=20 compartment just fine, but will also provide hours of = later "enjoyment"=20 combing straight the flatten fins in the radiators and cooler. =20 I believe   I learned this the same way Mark did.=20 {:>)
 
Ed Anderson
----- Original Message -----
From:=20 Mark R Steitle =
Sent: Monday, January 10, 2005 = 2:09=20 PM
Subject: [FlyRotary] Re: Oil = cooler=20 baffles

John,=20

You = didn=92t happen to=20 =93power-wash=94 your a/c lately?  That will flatten the fins on = a=20 heat-exchanger in a hurry.  Don=92t ask how I learned this.  =

 

Mark = S. =20  

 

From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John = Slade
Sent: Monday, January 10, 2005 = 12:31=20 PM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 Oil cooler baffles

 

Rotarians,

First an=20 admission:

A couple of = days ago=20 I took off with the landing brake down. I only have the NACA scoop, so = the=20 engine was getting very little air. By the time I was downwind the = temps were=20 outrageous. Coolant got to 270 and oil to 260. Needless to say I = glided to a=20 landing (on the runway) at idle. Thankfully the engine seems no worse = for the=20 experience. Oil pressure is ok to good and static rpm is unchanged. I = flew=20 again today (landing brake up) and temps were tolerable, but higher = than I=20 used to have long ago, in hotter weather before the new turbo and the=20 rebuild. 

 

Now the=20 question:

Looking at = my two=20 stock 3rd gen oil coolers after landing I noticed something = strange -=20 most of the thin aluminum baffles between the oil channels are=20 all bent flat, blocking the air flow. Those that aren't bent = are=20 toward the lower edge of the cooler where airflow might well be less. = They're=20 all bent the same in an even pattern that would indicate to me = that this=20 was either done by one of those crop circle guys on his day off, of = the high=20 pressure air from the scoop hitting the coolers at an angle.=20

 

Has anyone = else seen=20 this? I know I can "comb" the aluminum straight again, but will it = just happen=20 again?

Should put = a baffle=20 in the air stream to angle the air = somehow?

 

John=20 (baffled)

 

 

 

 

= ------=_NextPart_000_0023_01C4F72B.93AA9160--