X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 16 Apr 2012 08:14:20 -0400 Message-ID: X-Original-Return-Path: Received: from p3plex2out03.prod.phx3.secureserver.net ([184.168.131.16] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5481509 for lml@lancaironline.net; Sat, 14 Apr 2012 13:42:35 -0400 Received-SPF: none receiver=logan.com; client-ip=184.168.131.16; envelope-from=pete@leapfrogventures.com Received: from P3PW5EX1HT003.EX1.SECURESERVER.NET ([72.167.180.21]) by p3plex2out03.prod.phx3.secureserver.net with bizsmtp id xthy1i0010U5vnL01thyG7; Sat, 14 Apr 2012 10:41:58 -0700 Received: from P3PW5EX1MB14.EX1.SECURESERVER.NET ([10.6.135.86]) by P3PW5EX1HT003.EX1.SECURESERVER.NET ([72.167.180.21]) with mapi; Sat, 14 Apr 2012 10:41:58 -0700 From: "pete@leapfrogventures.com" X-Original-To: John Barrett , "lml@lancaironline.net" X-Original-Date: Sat, 14 Apr 2012 10:42:03 -0700 Subject: RE: TSIO 550 Hot #2 cylinder Thread-Topic: TSIO 550 Hot #2 cylinder Thread-Index: Ac0Z8/nOiU0CMQXGQAyj8pXs8YUhfQAcN/4g X-Original-Message-ID: <2A14E6258A8534418F5498D73CCA51EFAE8E0D35@P3PW5EX1MB14.EX1.SECURESERVER.NET> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_2A14E6258A8534418F5498D73CCA51EFAE8E0D35P3PW5EX1MB14EX1_" MIME-Version: 1.0 --_000_2A14E6258A8534418F5498D73CCA51EFAE8E0D35P3PW5EX1MB14EX1_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable #2 was also my hottest cylinder. First I installed the cupped insert that = was listed in one of the on-line articles that allows the air to flow aroun= d the shallow fins on the oil cooler side of #2. I learned that TCM cylind= ers have asymmetric depths on the fins on the left vs right sides. The lef= t sides have very deep channels between the fins, while on the right side t= he cylinder barrel comes right up to the top of the cooling fins. This mea= ns that the oil cooler box effectively blocks the cooling air from going ar= ound to the lower right side of the cylinder. However, even with the cupped insert, #2 was still my hottest. At that poi= nt I remembered that my engine, which I got from a salvage of Adam aircraft= inventory, came with a piece of baffling for the oil box that had a scoop = installed inside the oil box that directed air around to the lower right si= de of the cylinder. The scoop was =BE" deep at the top and flush at the bo= ttom, and about 3" wide. I moved this scoop from the discarded Adam baffli= ng piece onto the Lancair oil box (the hole was nearly the same size as the= previous dished shaped part I had installed before). Not only did this so= lve my #2 CHT problem (it is now one of my coolest cylinders), but it did n= ot noticeably affect oil temps. A win-win. Pete From: John Barrett [mailto:jbarrett@carbinge.com] Sent: Friday, April 13, 2012 9:02 PM To: lml@lancaironline.net Subject: TSIO 550 Hot #2 cylinder Looking for advice for this problem. Oil cooler door may help a little but= the trade off of oil temp increase vs CHT increase is a trap at high power= climb and in slow flight. Two hours of flight time and problem is consist= ent up to about 8,000 or 9,000 ft. One idea suggested is to fair the insid= e top of the intake cowl on the left side because turbulence here will decr= ease the airflow to the top left side of the engine. One person indicated = he did this with a IVP and achieved a 20 degree drop in EGT by doing this. Anyone else have experience with that? Thanks in advance and to those who have sent congratulatory emails. Regards, John Barrett, CEO Leading Edge Composites PO Box 428 Port Hadlock, WA 98339 www.carbinge.com --_000_2A14E6258A8534418F5498D73CCA51EFAE8E0D35P3PW5EX1MB14EX1_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

#2 was also my hottest cylinder.=A0 First I installed the cuppe= d insert that was listed in one of the on-line articles that allows the air= to flow around the shallow fins on the oil cooler side of #2.=A0 I learned= that TCM cylinders have asymmetric depths on the fins on the left vs right= sides.=A0 The left sides have very deep channels between the fins, while o= n the right side the cylinder barrel comes right up to the top of the cooli= ng fins.=A0 This means that the oil cooler box effectively blocks the cooli= ng air from going around to the lower right side of the cylinder.=A0 <= /o:p>

 = ;

However,= even with the cupped insert, #2 was still my hottest.=A0 At that point I r= emembered that my engine, which I got from a salvage of Adam aircraft inven= tory, came with a piece of baffling for the oil box that had a scoop instal= led inside the oil box that directed air around to the lower right side of = the cylinder.=A0 The scoop was =BE” deep at the top and flush at the = bottom, and about 3” wide.=A0 I moved this scoop from the discarded A= dam baffling piece onto the Lancair oil box (the hole was nearly the same s= ize as the previous dished shaped part I had installed before).=A0 Not only= did this solve my #2 CHT problem (it is now one of my coolest cylinders), = but it did not noticeably affect oil temps.=A0 A win-win.=

 

Pete

 

From:= Joh= n Barrett [mailto:jbarrett@carbinge.com]
Sent: Friday, April 13,= 2012 9:02 PM
To: lml@lancaironline.net
Subject: TSIO 5= 50 Hot #2 cylinder

 

Looking for advice for this problem= .  Oil cooler door may help a little but the trade off of oil temp inc= rease vs CHT increase is a trap at high power climb and in slow flight.&nbs= p; Two hours of flight time and problem is consistent up to about 8,000 or = 9,000 ft.  One idea suggested is to fair the inside top of the intake = cowl on the left side because turbulence here will decrease the airflow to = the top left side of the engine.  One person indicated he did this wit= h a IVP and achieved a 20 degree drop in EGT by doing this. 

 

Anyone= else have experience with that?

&n= bsp;

Thanks in advance and to those who have = sent congratulatory emails.

 <= /o:p>

Regards,

<= o:p> 

John Barrett, CEO

Leading Edge Composites

PO Box 428

Port Hadlock, WA 98339

 

<= a href=3D"http://www.carbinge.com">www.carbinge.com

 

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