X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 23 May 2011 08:03:10 -0400 Message-ID: X-Original-Return-Path: Received: from nm10-vm2.bullet.mail.ne1.yahoo.com ([98.138.90.158] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with SMTP id 4991069 for lml@lancaironline.net; Sun, 22 May 2011 10:04:43 -0400 Received-SPF: none receiver=logan.com; client-ip=98.138.90.158; envelope-from=n20087@yahoo.com Received: from [98.138.90.50] by nm10.bullet.mail.ne1.yahoo.com with NNFMP; 22 May 2011 14:04:08 -0000 Received: from [98.138.88.234] by tm3.bullet.mail.ne1.yahoo.com with NNFMP; 22 May 2011 14:04:08 -0000 Received: from [127.0.0.1] by omp1034.mail.ne1.yahoo.com with NNFMP; 22 May 2011 14:04:08 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 199148.91487.bm@omp1034.mail.ne1.yahoo.com Received: (qmail 5398 invoked by uid 60001); 22 May 2011 14:04:07 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=I26hx17oUsEm6YZg3KYygWCMFrQhAIW0e5iAJILWYdz4X0gMygTAfw6k56tXdxw4WTcSveHiEjN7yquLcurWRWFl81brYiyiEJhdOb0n/AjUYaQdtM4imVRdZR7cf7J/w5RXvKmymr3THDfx8k4E9u+3EX/JiAfXndKdVAlYXYo=; X-Original-Message-ID: <163125.1256.qm@web112720.mail.gq1.yahoo.com> X-YMail-OSG: e2ru_PMVM1m1rNRIOnBlsaSkRzkCvmdQIfXroPTjOnrnYKt gXsMXe_AFrXlnuueZmQhttWJJqxOIDTeQiJzlmOB3eH.7fPhHLsrvZCEozct .XqPyR0Me_s0ETcjlJdp3s6NlouiutDdNYotkdM3gYeaar4DlTQEnsxh_Mm. 1Suu3DcPozGv3yhrdB9t.ejTueTWqwjvPw50g9G8IA5R4btCEng5yxbabESO JFdk7bWlsUqfSWBCy2YsO795LF3xx.7azPrFEYUcD5TMHCL2SfbDMCguyrhY PMuqXbNwSNlO9wNfwEWTRUdqXqXhU_adjxF5EnaX8qgw0IAWKZlQsCYbjKWu ZBjNhS7vPt7Z9_N.wLSZoM59tBb41t1q2oDUaEklqZT7quSqWZ4kNrwA- Received: from [98.185.51.168] by web112720.mail.gq1.yahoo.com via HTTP; Sun, 22 May 2011 07:04:06 PDT X-Mailer: YahooMailRC/567 YahooMailWebService/0.8.111.303096 References: X-Original-Date: Sun, 22 May 2011 07:04:06 -0700 (PDT) From: TOM GARDINER Subject: Re: [LML] Re: FW: LNC2 Vibration Issues X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1357898207-1306073046=:1256" --0-1357898207-1306073046=:1256 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable =0A=0A=0A=0AFolks,=0A=A0=0AI appreciate the great response from the LML lis= t to my vibration problem.=A0 I =0Ahave checked everything that was mention= ed in the emails.=A0 Most people including =0Amyself suspect a tracking iss= ue. But here is the rub:=A0 On the ground the =0Atracking appears to be per= fect with the engine noyt running.=A0 Now this is where =0Ait gets interest= ing, in cruise and level flight at 24"/2400RPM=A0I can see some =0Adither o= n my ASI and feel=A0the vibration thorugh the airframe.=A0 Now if I point = =0Athe plane downhill at say 700fpm or more and the same power setting ever= ything =0Asmoothes out!=A0 =0A=0A=A0=0AThis to me suggests something in the= prop tracking or engine mounting =0Aarrangement since right turning P fact= or is less with the nose below the =0Ahorizon.=A0 Any ideas?=0A=A0=0AThanks= =0A=A0=0ATom=0A=A0=0ALNC2 50 hrs --0-1357898207-1306073046=:1256 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable

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Folks,

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=0A

I appreciate the great response from the LML list to= my vibration problem. I have checked everything that was mentioned i= n the emails. Most people including myself suspect a tracking issue. = But here is the rub: On the ground the tracking appears to be perfect= with the engine noyt running. Now this is where it gets interesting,= in cruise and level flight at 24"/2400RPM I can see some dither on my= ASI and feel the vibration thorugh the airframe. Now if I point= the plane downhill at say 700fpm or more and the same power setting everyt= hing smoothes out!

=0A

This to me suggests something in the prop tracking or en= gine mounting arrangement since right turning P factor is less with the nos= e below the horizon. Any ideas?

=0A

Thanks

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Tom

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LNC2 50 hrs

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