X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 25 Jul 2013 16:44:11 -0400 Message-ID: X-Original-Return-Path: Received: from nm8-vm0.bullet.mail.bf1.yahoo.com ([98.139.213.95] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6391143 for lml@lancaironline.net; Thu, 25 Jul 2013 16:38:00 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.213.95; envelope-from=lancair1@bellsouth.net Received: from [98.139.212.150] by nm8.bullet.mail.bf1.yahoo.com with NNFMP; 25 Jul 2013 20:37:24 -0000 Received: from [98.139.213.12] by tm7.bullet.mail.bf1.yahoo.com with NNFMP; 25 Jul 2013 20:37:22 -0000 Received: from [127.0.0.1] by smtp112.mail.bf1.yahoo.com with NNFMP; 25 Jul 2013 20:37:22 -0000 X-Yahoo-Newman-Id: 708489.97488.bm@smtp112.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: K.jpsgoVM1kunejqOmuNhMNQiCfGouesTbXe2EPL5xvGqLS IBgV9oXi6OSu6It2ndkk30tYgHsTiExJDFWY.6vdwbABIIPaGQII6Fk31Dsz bTVqimykgC7.0aTYrIUiAPfFIJAz9bzJP1Rt.SPcCpnxQ8VOdmnXrJBRDptB AkeQXy4ceIMV9a0aPNpNlMyk95cdYHXBgJSPrjl38huiGmJSccTSnq2UrXPy iMpGTusxL3XjOhVc4Erw6pBIYEfLF1sN1hkWhj1djMBKcJPsXDM_vvLLZBdG mAzVWgX5yO8lktRCEnNmgrMsz6LyVHV0dD.Eb3rTt93ALwFUdGJCuxmK_kTl hRQ4E99g2wfi9EL2gC1Y.isO_653vJ40iFzGyK1IEL33BQtPxMTYKYsUuQ1u X_3C3K.i46_enk8U5mXufwpN3zdtwvneapAWjr1iO.CWsXtRdyywwlEaCByn 4sFA.f..xhj48QzwR_o7ef9RQ3n00u2k7CtjGOitHw.RuNbPqoTEu3xU5zWW qlqlvzsYt57Ez8aEc.qn5D405aqe4Bizn3wVdRr8SSe_f0..KQh.mNG9zLpc zQ2DstVYKD9LqwyciC_nD.VHx1DwxwQlqso5FWMdVh9Wbga9oaQx2VDaraZS aIZymIgXDVx.lDSJ.IwvC_WNIohg- X-Yahoo-SMTP: DusPlfGswBAl7wtqFzQUR2IcVv1i0z4gnKT0Em7VqxiCxIg- X-Rocket-Received: from [192.168.1.104] (lancair1@98.71.217.89 with ) by smtp112.mail.bf1.yahoo.com with SMTP; 25 Jul 2013 13:37:22 -0700 PDT Subject: Re: [LML] Re: Potential Problem-Engine Vibration References: From: Douglas Johnson Content-Type: multipart/alternative; boundary=Apple-Mail-B2EDDCC8-5C75-4FCF-A689-2ADFCD7F023B X-Mailer: iPad Mail (10B329) In-Reply-To: X-Original-Message-Id: X-Original-Date: Thu, 25 Jul 2013 16:37:23 -0400 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-B2EDDCC8-5C75-4FCF-A689-2ADFCD7F023B Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable My 550/hartzell scimitar is and has always been smooth. 1350hrs TT Douglas Johnson MD Sent from my iPad On Jul 25, 2013, at 12:10 PM, Bob Rickard wrote: >=20 > The key point that this thread is about is a vibration that is NOT "normal= ". The key indicator is a change in the magnitude of the vibration with a c= hange in RPM. There are enough of you out there that have responded to me d= irectly that state you have made all attempts at correcting the "normal" vib= ration issues, ruling out alternators, cowl interference, motor mounts, dyna= mic balancing, crank counter weights, etc. Those things are normal and woul= d not likely cause damage to the crank prop flange if left untreated. The p= roblem we are discussing is related to the prop/engine combination. =20 >=20 > We have confirmed reports of 550 motors being smooth with McCauley props, A= erocomposite Props and MT props, to answer Charley's question below. Howeve= r, NO ONE has come forward and said "My 550 engine/Hartzell Scimitar 78" pro= p combination is smooth". I would be very interested if someone out there c= an say that. To the contrary, I have received multiple responses from 4 dif= ferent aircraft types that say "I have dealt with this for a long time and c= an't fix it". Now what? >=20 > Bob R >=20 >=20 >=20 > On Jul 25, 2013, at 9:21 AM, Paul Miller wrote: >=20 >> Ed Martin's legacy is smooth. Mine has had a lot of annoying vibes as yo= u describe but virtually all have been removed with lots of cowling interfer= ence fixes and plug change. Many pilots forget the alternator can be a wick= ed source of vibration and it is almost in the same plane as the prop. >>=20 >> The problems I had originally were in that freq range and visible at the w= ingtip also. >>=20 >> Paul >>=20 >> On 2013-07-25, at 9:54, Charles Brown wrote: >>=20 >>>=20 >>> Has anyone definitely flown a vibration-free IO-550 Lancair (or TSIO-550= ) with *any* propeller? And by vibration-free, I mean it is free of low-fre= quency 10-20Hz stuff, not the normal noise of flying. What I'm wondering is= ... is it the 550, making such vibration with *any* propeller? >>>=20 >>> Charley Brown >>> Legacy RG 280hr >>=20 >> -- >> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht= ml >=20 > >=20 > Bob Rickard > President, Rickard Consulting Group, Inc. > r.rickard@rcginc-us.com >=20 >=20 >=20 --Apple-Mail-B2EDDCC8-5C75-4FCF-A689-2ADFCD7F023B Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
My 550/hartzell scimitar is and has al= ways been smooth.
1350hrs TT

Douglas Johnson MD
Sent fr= om my iPad

On Jul 25, 2013, at 12:10 PM, Bob Rickard <= ;r.rickard@rcginc-us.com> w= rote:


The key= point that this thread is about is a vibration that is NOT "normal".  = The key indicator is a change in the magnitude of the vibration with a chang= e in RPM.  There are enough of you out there that have responded to me d= irectly that state you have made all attempts at correcting the "normal" vib= ration issues, ruling out alternators, cowl interference, motor mounts, dyna= mic balancing, crank counter weights, etc.  Those things are normal and= would not likely cause damage to the crank prop flange if left untreated. &= nbsp;The problem we are discussing is related to the prop/engine combination= .  

We have confirmed reports of 550 motors be= ing smooth with McCauley props, Aerocomposite Props and MT props, to answer C= harley's question below.  However, NO ONE has come forward and said "My= 550 engine/Hartzell Scimitar 78" prop combination is smooth".  I would= be very interested if someone out there can say that.  To the contrary= , I have received multiple responses from 4 different aircraft types that sa= y "I have dealt with this for a long time and can't fix it".  Now what?=

Bob R



=
On Jul 25, 2013, at 9:21 AM, Paul Miller <pjdmiller@gmail.com> wrote:

Ed Martin's legacy is s= mooth.  Mine has had a lot of annoying vibes as you describe but virtua= lly all have been removed with lots of cowling interference fixes and plug c= hange.  Many pilots forget the alternator can be a wicked source of vib= ration and it is almost in the same plane as the prop.

The problems I= had originally were in that freq range and visible at the wingtip also.
=
Paul

On 2013-07-25, at 9:54, Charles Brown <browncc1@verizon.net> wrote:


Has anyone definitely flown a vibration-free IO-550 Lanca= ir (or TSIO-550) with *any* propeller?  And by vibration-free, I mean i= t is free of low-frequency 10-20Hz stuff, not the normal noise of flying. &n= bsp;What I'm wondering is...  is it the 550, making such vibration with= *any* propeller?

Charley Brown
Legacy RG  280hr


<= /blockquote>
--
For archives and unsub http://mail.lancaironline.net:81/lists/lml= /List.html

= <RCG Logo for Email.jpg>

Bob Rickard
President, Rickard Consulti= ng Group, Inc.


=

= --Apple-Mail-B2EDDCC8-5C75-4FCF-A689-2ADFCD7F023B--