X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 20 May 2009 14:58:32 -0400 Message-ID: X-Original-Return-Path: Received: from asp-3.reflexion.net ([205.237.99.178] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with SMTP id 3647641 for lml@lancaironline.net; Tue, 19 May 2009 22:47:51 -0400 Received-SPF: none receiver=logan.com; client-ip=205.237.99.178; envelope-from=cberland@systems3.net Received: (qmail 27044 invoked from network); 20 May 2009 02:47:14 -0000 Received: from unknown (HELO asp-3.reflexion.net) (127.0.0.1) by 0 (rfx-qmail) with SMTP; 20 May 2009 02:47:14 -0000 Received: by asp-3.reflexion.net (Reflexion email security v5.60.9) with SMTP; Tue, 19 May 2009 22:47:14 -0400 (EDT) Received: (qmail 27015 invoked from network); 20 May 2009 02:47:14 -0000 Received: from unknown (HELO systems3.net) (98.172.79.178) by 0 (rfx-qmail) with SMTP; 20 May 2009 02:47:14 -0000 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C9D8F5.476922DE" Subject: [LML] Temperature spike X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Date: Tue, 19 May 2009 19:46:58 -0700 X-Original-Message-ID: <87C33F695961494D886EB3B6C8A476515D03BF@s3server.Systems3.local> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Temperature spike Thread-Index: AcnY43TT6hK3EgPHSF+07Rs4Cf3ZYgAD3k2Q References: From: "Craig Berland" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C9D8F5.476922DE Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Art, =20 With the cylinder temp going to 500 degF, I would be very concerned that the engine went into pre-ignition. In pre-ignition the cylinder temps go up "fast" and the power falls off. Did the plane slow down? However....and coincidentally I have flown from AZ to SOCAL and back both of the last two weekends and both times I had to leave the cowl flaps open to keep the #1 cylinder head temp from going over my personal bogie of 380 degF. I was at 11K to 12K and the outside air temp was quite warm. I was flying my TNIO-550 Bonanza at 75 deg LOP and 2500 rpm/30inHg. (16.7 gph) Yes, I was going a lot slower than you were. =20 The concern with pre-ignition is it can take out the top of a piston in just seconds. Look for anything that could make itself into a glow plug as the engine heats up. Thread of a spark plug sticking trough into the chamber....anything like that. Craig Berland =20 Had an interesting thing happen on a flight from AZ to So Calif. Cruising at 14500ft had been in cruise about 40 min. was running 2600RPM 31" 18GPH about 75 deg. LOP. The temp on #1 cylinder went from 315 to 500 oil pressure dropped to 15 oil temp went from 178 to 197. I went full rich reduced power to 17" and=20 went to nearest airport to land, this action brought=20 temps back into normal as well as oil pressure to 38. On the ground I removed the top cowl to be sure there where no oil leaks and found non. Refowled plane=20 took off and did some laps in the pattern everything normal started home and at 8500 ft and 30 minutes later same thing CHT 425 oil pressure 21 oil temp 174. I had been flying at 2500/22". I reduced power again and temps=20 came back down, I continued home. I since have removed the cylinder and have had it inspected by 2 competent mechanics and no damage. The engine has 260hr.s, does anyone have any ideas as to the problem?. Your thoughts and ideas would be appreciated Art =20 ------_=_NextPart_001_01C9D8F5.476922DE Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Art,

With the cylinder temp going to 500 degF, I would be very concerned that the engine went into pre-ignition. In pre-ignition = the cylinder temps go up “fast” and the power falls off. = Did the plane slow down? However….and coincidentally I have = flown from AZ to SOCAL and back both of the last two weekends and both times I = had to leave the cowl flaps open to keep the #1 cylinder head temp from going = over my personal bogie of 380 degF. I was at 11K to 12K and the outside = air temp was quite warm. I was flying my TNIO-550 Bonanza at 75 deg LOP and = 2500 rpm/30inHg. (16.7 gph) Yes, I was going a lot slower than you = were.

The concern with pre-ignition is it can take out the top = of a piston in just seconds. Look for anything that could make itself = into a glow plug as the engine heats up. Thread of a spark plug sticking = trough into the chamber….anything like that.

Craig Berland

Had an interesting thing happen on a flight from AZ = to

So Calif. Cruising at 14500ft had been in cruise about

40 min. was running 2600RPM 31" 18GPH = about

75 deg. LOP. The temp on #1 cylinder went from 315

to 500 oil pressure dropped to 15 oil temp went from

178 to 197. I went full rich reduced power to 17" and =

went to nearest airport to land, this action brought =

temps back into normal as well as oil pressure to 38.

On the ground I removed the top cowl to be sure there

where no oil leaks and found non. Refowled plane

took off and did some laps in the pattern everything

normal started home and at 8500 ft and 30 minutes later

same thing CHT 425 oil pressure 21 oil temp 174. I had been flying at = 2500/22". I reduced power again and temps

came back down, I continued home. I since have removed

the cylinder and have had it inspected by 2 competent

mechanics and no damage. The engine has 260hr.s, does

anyone have any ideas as to the problem?. Your thoughts

and ideas would be appreciated

Art

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