X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 10 Jun 2005 10:48:54 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m18.mx.aol.com ([64.12.138.208] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 990419 for lml@lancaironline.net; Thu, 09 Jun 2005 16:18:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m18.mx.aol.com (mail_out_v38_r1.7.) id q.be.2a735e79 (14374) for ; Thu, 9 Jun 2005 16:17:14 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Thu, 9 Jun 2005 16:17:10 EDT Subject: Re: [LML] Re: LNC2 Tail Wagging ??? X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1118348230" X-Mailer: 9.0 Security Edition for Windows sub 5009 -------------------------------1118348230 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 6/9/2005 11:05:51 A.M. Central Standard Time, mjrav@comcast.net writes: I've seen ailerons flutter at low frequency when they were not balanced. This could be felt in the stick as well and was obvious at 200 mph. (I didn't buy that plane) It would take some doing, even for as clever a fellow as yourself, to see the rudder in flight. Maybe a little close formation could help zero in on the trouble. Whatever is wiggling may be detectable. Mark (inverted at the speed of sound - hah!), On the ground, my prop shows .1 ips on the accelerometer at various rpms up to about 2400. It is balanced at 2600 at .03 ips. I suspect some coupled resonant situation. Today I tried slips (skids?) Trimmed in level flight at 174 KIAS: Left rudder only, ball out to the right, no change in vibration, climb initiated. Right rudder only, ball out to left, no change in vibration, dive initiated. ??? My "Aeronautics for the Naval Aviator" is not helping me here. Upon landing, I noticed streaks flowing back from the right outboard elevator hinge. ??? Maybe I finally got all the oil out after lubricating the oversize pins (about 15- 20 flight hours ago). Of course I was practicing 60 degree steep turns both ways - not bad, less than 200 foot change in altitude in one segment where my mind wandered a bit. I have been thinking of mounting an accelerometer in the tail to see if there is anything to see. I wonder if your tail stiffener would be a fix? Scott -------------------------------1118348230 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 6/9/2005 11:05:51 A.M. Central Standard Time,=20 mjrav@comcast.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

I've seen ailerons flutter at low frequen= cy when=20 they were not balanced. This could be felt in the stick as well and=20= was=20 obvious at 200 mph.

(I didn't buy that plane)

It would take some doing, even for as cle= ver a=20 fellow as yourself, to see the rudder in flight.

Maybe a little close formation could help= zero in=20 on the trouble. Whatever is wiggling may be=20 detectable.

Mark (inverted at the speed of sound - hah!),

On the ground, my prop shows .1 ips on the accelerometer at various rpm= s up=20 to about 2400. It is balanced at 2600 at .03 ips. I suspec= t=20 some coupled resonant situation. Today I tried slips (skids?) Trimmed=20= in=20 level flight at 174 KIAS:

Left rudder only, ball out to the right, no change in vibration, climb=20 initiated.

Right rudder only, ball out to left, no change in vibration, dive=20 initiated.

???

My "Aeronautics for the Naval Aviator" is not helping me here.

Upon landing, I noticed streaks flowing back from the right outboa= rd=20 elevator hinge. ??? Maybe I finally got all the oil out after=20 lubricating the oversize pins (about 15- 20 flight hours ago). Of cour= se I=20 was practicing 60 degree steep turns both ways - not bad, less than 200 foot= =20 change in altitude in one segment where my mind wandered a bit.

I have been thinking of mounting an accelerometer in the tail to see if= =20 there is anything to see. I wonder if your tail stiffener would be a=20 fix?

Scott

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