X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 09 Dec 2008 08:43:26 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m23.mx.aol.com ([64.12.137.4] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3342426 for lml@lancaironline.net; Mon, 08 Dec 2008 14:38:29 -0500 Received: from Mquinns@aol.com by imo-m23.mx.aol.com (mail_out_v39.1.) id q.d47.35c8875b (37168) for ; Mon, 8 Dec 2008 14:38:17 -0500 (EST) Received: from smtprly-mb01.mx.aol.com (smtprly-mb01.mx.aol.com [64.12.207.148]) by cia-ma04.mx.aol.com (v121_r5.1) with ESMTP id MAILCIAMA047-5c5c493d77a51ad; Mon, 08 Dec 2008 14:38:16 -0500 Received: from FWM-M37 (fwm-m37.webmail.aol.com [64.12.193.239]) by smtprly-mb01.mx.aol.com (v121_r5.1) with ESMTP id MAILSMTPRLYMB012-5c5c493d77a51ad; Mon, 08 Dec 2008 14:38:13 -0500 References: X-Original-To: lml@lancaironline.net Subject: Re: [LML] Re: outback gear doors-vibration is back X-Original-Date: Mon, 08 Dec 2008 14:38:13 -0500 X-AOL-IP: 207.126.196.16 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: mquinns@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CB2783A4942F98_28C_89A_FWM-M37.sysops.aol.com" X-Mailer: AOL Webmail 39997-STANDARD Received: from 207.126.196.16 by FWM-M37.sysops.aol.com (64.12.193.239) with HTTP (WebMailUI); Mon, 08 Dec 2008 14:38:13 -0500 X-Original-Message-Id: <8CB2783A48843DB-28C-455@FWM-M37.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CB2783A4942F98_28C_89A_FWM-M37.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Harry, =C2=A0=C2=A0 That is an idea I have not explored but=C2=A0this week I am fin= ishing up on a magnetic helper at the trailing edge to see whether that will= work. If not, your idea sounds like a possibility. Thanks Mark Quinn -----Original Message----- From: Harry League To: lml@lancaironline.net Sent: Mon, 8 Dec 2008 1:55 pm Subject: [LML] Re: outback gear doors-vibration is back Just a thought:=C2=A0 would a couple of air vents in the doors solve the pro= blem?=C2=A0=C2=A0 Start small and move larger until the noise stops or the d= oors stay shut. =C2=A0 Regards, Harry League =C2=A0 =C2=A0 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of marv@= lancair.net Sent: Saturday, December 06, 2008 21:46 PM To: lml@lancaironline.net Subject: [LML] Re: outback gear doors-vibration is back =C2=A0 Posted for mquinns@aol.com: =C2=A0Dom, =C2=A0=C2=A0=C2=A0=C2=A0 AC-DC is not to my taste but listening to them woul= d be far more musical=20 and pleasant than gear door rumblings. Attached is a close up picture of a=20 musical nocturne. =C2=A0 =C2=A0Mark =C2=A0 =C2=A0 =C2=A0-----Original Message----- From: Dominic V. Crain =C2=A0To: lml@lancaironline.net =C2=A0Sent: Fri, 5 Dec 2008 12:06 pm =C2=A0Subject: [LML] Re: outback gear doors-vibration is back =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would think that the gear doors rumbling would be far more musical t= han=20 listening to AC-DC. =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Cheers =C2=A0 =C2=A0Dom =C2=A0 =C2=A0VH-CZJ =C2=A0=3D0 A=C2=A0=C2=A0 =C2=A0 =C2=A0 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of=20 mquinns@aol.com =C2=A0Sent: Friday, 5 December 2008 3:25 PM =C2=A0To: lml@lancaironline.net =C2=A0Subject: [LML] Re: outback gear doors-vibration is back =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Gerard, =C2=A0=C2=A0=C2=A0 I had the same problem. Whenever the airspeed started mov= ing past 210=20 knots a buzz would start and then turn into a rumble as the plane went faste= r.=20 If the aircraft was decelerated......to a speed around 205 knots, the rumbli= ng=20 and buzzing would disappear but would reappear if the aircraft accelerated=20 back above 210 knots. I was certain it was the nose gear door (made from=20 fiberglass) so I took the advice in archive and fabricated a much stiffer=20 aluminum door. To my surprise the buzzing and rumbling problem was still the= re=20 over certain speeds.!!!!???!!!! Fortunately for me, I live at at a place whe= re=20 we formation fly to breakfast every Saturday and I usually fly with the SX-3= 00=20 guys. One of these friends volunteered to go up with me and formate under me= =20 to=20 =C2=A0see if the problem could be observed. Apparently, the main gear doors=20 trailing edges are being sucked out into the slipstream at certain airspeeds= .=20 We repeated the speed runs (accelerate/decelerate) and proble! m was clear. =C2=A0=C2=A0=C2=A0 My plane does have a difference with yours which is, even= though I have=20 the outback gear, I decided=C2=A0to use the original cutout doors thinking t= hey=20 would create less drag. Don't know=20 whether they do or not but have been unable=20 after many different attempts to keep the doors closed at high speed. In=20 January I will be racing and afterwards plan on doing a major condition=20 inspection (demating wings, removing all control surfaces, etc) and at that=20 time will fit the original outback gear doors from the option kit. They do=20 appear to be stiffer (I hope they don't generate more drag). I hope that thi= s=20 cures my problem. Some of the Reno racers have recommended stiffening gear=20 doors because this is a common problem for them while racing. If you find a=20 magic bullet to correct the problem, please post=C2=A0it.=C2=A0 =C2=A0 =C2=A0Mark Quinn =C2=A0Lancair 360 =C2=A0Spruce Creek Fly-in, Florida =C2=A0 =C2=A0 =C2=A0-----Original Message----- From: gerardoconnell@optusnet.com.au =C2=A0To: lml@lancaironline.net =C2=A0Sent: Wed, 3 Dec 2008 9:15 pm =C2=A0Subject: [LML] outback gear doors-vibration is back =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Hi Ian and those whom have had gear door problems =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0-Gerard from Down Under/Up Over has gremlins again =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Hope you're going well and enjoying you're flying. I'm just writing a=20= quick=20 note=20 =C2=A0 =C2=A0both on and off =C2=A0list as we've been over this ground before.=20 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Do you recall discussing the buzzing noise I had some time back which=20= I=20 resolved=20 =C2=A0 =C2=A0both by removing the nose gear door and overlapping the main and inboa= rd gear=20 =C2=A00A=C2=A0doors to get better "purchase" and stop vibration. =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Well guess what?=C2=A0=C2=A0 Thhe noise is now starting to return-I in= itially thought I=20 =C2=A0 =C2=A0had the bass turned up too much whilst listening to AC -DC but even wi= th the=20 =C2=A0 =C2=A0radio off I can appreciate the buzz from outside the aircraft.=20 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Perhaps I need to listen to Robbie Williams instead? =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0I originally spent thousands of $ trying various solutions to this pro= blem=20 and=20 =C2=A0 =C2=A0the final fix has worked for about 200 hours. I understand that some h= ave=20 also=20 =C2=A0 =C2=A0extended the door hinge/bracket to address this problem. =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0In short, my question is this-did you have this buzzing/vibration prob= lem and=20 =C2=A0 =C2=A0what methods did you employ before removing the inner gear doors altog= ether?=20 Is=20 =C2=A0 =C2=A0this my best short cut to making the problem go away once and for all? =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Your thoughts would be appreciated including and issues you mar or may= nopt=20 have=20 =C2=A0 =C2=A0experienced after removing the inner doors. =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Cheers, =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0Gerard =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0-- =C2=A0 For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Listen to 350+ music, sports, & news radio statio ns =E2=80=93 including songs for the=20 holidays =E2=80=93 FREE while you browse. =C2=A0Start Listening Now!=20 =C2=A0 =C2=A0 =C2=A0 ----------MB_8CB2783A4942F98_28C_89A_FWM-M37.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8" Harry,
   That is an idea I have not explored but this week I am fin= ishing up on a magnetic helper at the trailing edge to see whether that will= work. If not, your idea sounds like a possibility. Thanks

Mark Quinn


-----Original Message-----
From: Harry League <harryleague@comcast.net>
To: lml@lancaironline.net
Sent: Mon, 8 Dec 2008 1:55 pm
Subject: [LML] Re: outback gear doors-vibration is back

Just a thought: = would a couple of air vents in the doors solve the problem?   Sta= rt small and move larger until the noise stops or the doors stay shut.
 
Regards,=
Harry League
=  
=  
From: Lancair Mailing List [mailt= o:lml@lancaironline.net] On Behalf=20= Of marv@lancair.net
Sent: Saturday, December 06,= 2008 21:46 PM
To: lml@lancaironline.net
Subject: [LML] Re: outback g= ear doors-vibration is back
 

Posted for mquinns@aol.com:

 Dom,
     AC-DC is not to my taste but listening to them woul= d be far more musical
and pleasant than gear door rumblings. Attached is a close up picture of a <= br> musical nocturne.
 
 Mark
 
 
 -----Original Message-----
From: Dominic V. Crain <domcrain@t= pg.com.au>
 To: lml@lancaironline.net=
 Sent: Fri, 5 Dec 2008 12:06 pm
 Subject: [LML] Re: outback gear doors-vibration is back
 
 
 
 
 I would think that the gear doors rumbling would be far more musical t= han
listening to AC-DC.
 
  
 
 Cheers
 
 Dom
 
 VH-CZJ
 
&nb sp; 
 
 
From: Lancair Mailing List [mailto= :lml@lancaironline.net] On Behalf Of
mquinns@aol.com
 Sent: Friday, 5 December 2008 3:25 PM
 To: lml@lancaironline.net=
 Subject: [LML] Re: outback gear doors-vibration is back
 
 
  
 
 Gerard,
    I had the same problem. Whenever the airspeed started mov= ing past 210
knots a buzz would start and then turn into a rumble as the plane went faste= r.
If the aircraft was decelerated......to a speed around 205 knots, the rumbli= ng
and buzzing would disappear but would reappear if the aircraft accelerated <= br> back above 210 knots. I was certain it was the nose gear door (made from fiberglass) so I took the advice in archive and fabricated a much stiffer aluminum door. To my surprise the buzzing and rumbling problem was still the= re
over certain speeds.!!!!???!!!! Fortunately for me, I live at at a place whe= re
we formation fly to breakfast every Saturday and I usually fly with the SX-3= 00
guys. One of these friends volunteered to go up with me and formate under me=
to
 see if the problem could be observed. Apparently, the main gear doors=20=
trailing edges are being sucked out into the slipstream at certain airspeeds= .
We repeated the speed runs (accelerate/decelerate) and proble! m was clear.<= br>     My plane does have a difference with yours which is, even though I have
the outback gear, I decided to use the original cutout doors thinking t= hey
would create less drag. Don't know whether they do or not but have been unab= le
after many different attempts to keep the doors closed at high speed. In January I will be racing and afterwards plan on doing a major condition
inspection (demating wings, removing all control surfaces, etc) and at that=20=
time will fit the original outback gear doors from the option kit. They do <= br> appear to be stiffer (I hope they don't generate more drag). I hope that thi= s
cures my problem. Some of the Reno racers have recommended stiffening gear <= br> doors because this is a common problem for them while racing. If you find a=20=
magic bullet to correct the problem, please post it. 
 
 Mark Quinn
 Lancair 360
 Spruce Creek Fly-in, Florida
 
 
 -----Original Message-----
From: gerardoconnell@optus= net.com.au
 To: lml@lancaironline.net=
 Sent: Wed, 3 Dec 2008 9:15 pm
 Subject: [LML] outback gear doors-vibration is back
 
 
  
 
  
 
 Hi Ian and those whom have had gear door problems
 
  
 
 -Gerard from Down Under/Up Over has gremlins again
 
  
 
  
 
 Hope you're=3D2 0going well and enjoying you're flying. I'm just writing a quick
note
 
 both on and off
 list as we've been over this ground before.
 
  
 
 Do you recall discussing the buzzing noise I had some time back which=20= I
resolved
 
 both by removing the nose gear door and overlapping the main and inboa= rd gear
 
 doors to get better "purchase" and stop vibration.
 
  
 
 Well guess what?   Thhe noise is now starting to return-I in= itially thought I
 
 had the bass turned up too much whilst listening to AC -DC but even wi= th the
 
 radio off I can appreciate the buzz from outside the aircraft.
 
  
 
 Perhaps I need to listen to Robbie Williams instead?
 
  
 
 I originally spent thousands of $ trying various solutions to this pro= blem
and
 
 the final fix has worked for about 200 hours. I understand that some h= ave
also
 
 extended the door hinge/bracket to address this problem.
 
  
 
 In short, my question is this-did you have this buzzing/vibration prob= lem and
 
 what methods did you employ before removing the inner gear doors altog= ether?
Is
 
 this my best short cut to making the problem go away once and for all?=
 
  
 
& nbsp;Your thoughts would be appreciated including and issues you mar or may=20= nopt
have
 
 experienced after removing the inner doors.
 
  
 
  
 
 Cheers,
 
  
 
 Gerard
 
  
 
  
 
  
 
  
 
  
 
 --
 
For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.= html
 
 
 
  
 
 
 
 Listen to 350+ music, sports, & news radio stations =E2=80=93 incl= uding songs for the
holidays =E2=80=93 FREE while you browse.
 Start Listening Now!
 
 
 

The weather's getting colder, but the movies are getting hotter. <= a href=3D"http://movies.aol.com/holiday-movies?ncid=3Demlweusmovi00000001">S= ee Moviefone's holiday movie guide and get the Moviefone Tool= bar today.
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