X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 23 Jul 2013 07:37:41 -0400 Message-ID: X-Original-Return-Path: Received: from nm50-vm7.bullet.mail.gq1.yahoo.com ([67.195.87.247] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6383514 for lml@lancaironline.net; Mon, 22 Jul 2013 21:26:48 -0400 Received-SPF: none receiver=logan.com; client-ip=67.195.87.247; envelope-from=mcmess1919@yahoo.com Received: from [216.39.60.182] by nm50.bullet.mail.gq1.yahoo.com with NNFMP; 23 Jul 2013 01:26:14 -0000 Received: from [98.136.164.66] by tm18.bullet.mail.gq1.yahoo.com with NNFMP; 23 Jul 2013 01:26:14 -0000 Received: from [127.0.0.1] by smtp228.mail.gq1.yahoo.com with NNFMP; 23 Jul 2013 01:26:14 -0000 X-Yahoo-Newman-Id: 239703.21143.bm@smtp228.mail.gq1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: LbVTV_kVM1lzTZhQvAc4hChDHIGeC_PQy86.jCJ0bTlgaVJ YbZp5LlmYMzX.Shn98XdG5.zun7_bMxkIGTOjmmni_AohhpS3RfhOPwUeDIh repqR6j1MYmeAt8JMYdwwV4E2g2uNHalxrSrAhYrUylFDZxr7hb5KNbOa_Yx pN1KjVxwBbmdF.p.B2T6POWC5GiIi607N0xBWxtRgFtPtveT36HDxyFHon6c PSY1ZkpqbPOZSMZ5X0ZxAufzUJE4aDTXxONDxZRFZ9Gm6MNW7gX_xHbwY1E3 vmpMuM1g37.ZeDlTq3RRV4I80MXsU4PyIuSGK5kBCvG5iVbs2wbyWO.jklPJ NGHIHBoanoVK07yk1s4jTzsgGsjruY.zcoPLcSX0VgRiaTmAx7g17lAzUg.i hF_4qWWtdhDDdaGUk1ak1lH2HjvdWb94hJKErgq4mArRxVgYmSq0GVDlSvAM uCXICcneGRIQ59bCyBKpgGczG1wbpLKSv6mlRBsLnXHiut7NcrcgKonSsjN9 _4ZsU0xCUa.noKGatSfuvmGAKAMusfPjgpsfC5E.WIyIP X-Yahoo-SMTP: rK4i7HqswBC7mDE8.sOiWQeO4CeReXc- X-Rocket-Received: from StevePC (mcmess1919@67.187.169.184 with ) by smtp228.mail.gq1.yahoo.com with SMTP; 23 Jul 2013 01:26:14 +0000 UTC From: "Steve Colwell" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: Potential Problem-Engine Vibration X-Original-Date: Mon, 22 Jul 2013 18:26:13 -0700 X-Original-Message-ID: <022601ce8743$9ef136d0$dcd3a470$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0227_01CE8708.F2925ED0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac6HEbKLBp7VvQ+gSiGrIFg1AnNNeAALQrZA Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_0227_01CE8708.F2925ED0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit We have been chasing a vibration from the first few hours on our Legacy IO-550 with stock compression and a Hartzell 3 blade. I don't have easy access to the prop model but it is the standard Hartzell supplied by Lancair for the IO-550. Our vibration varies in magnitude with power setting and air speed. It is most noticeable with control stick shake but also could be felt on the dust cover. I went thru an exhaustive series of finding engine/cowl contact points, questioning gear doors, rechecking control surfaces, two prop balances and an engine rebuild (cracked case). I thought it was almost fixed several times since it was not easily replicated. Then it would come back, sometimes very slightly, other times worse. Actually, this is a relief to know what the likely problem is after 5 years and 400 hours of chasing a fix. We just booked a Southwest round trip to OSH. I really don't want to be the next statistic. Thanks Bob and Ed. Steve ------=_NextPart_000_0227_01CE8708.F2925ED0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

We have been chasing a vibration from the first few hours on our = Legacy IO-550 with stock compression and a Hartzell 3 blade. I = don’t have easy access to the prop model but it is the standard = Hartzell supplied by Lancair for the IO-550. =

Our vibration varies in magnitude with power setting and air = speed. It is most noticeable with control stick shake but also = could be felt on the dust cover. I went thru an exhaustive = series of finding engine/cowl contact points, questioning gear doors, = rechecking control surfaces, two prop balances and an engine rebuild = (cracked case). I thought it was almost fixed several times since = it was not easily replicated. Then it would come back, sometimes = very slightly, other times worse.

Actually, this is a relief to know what the likely problem is after 5 = years and 400 hours of chasing a fix. We just booked a Southwest = round trip to OSH. I really don’t want to be the next = statistic. Thanks Bob and Ed.

Steve

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