Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 20 Aug 2002 08:59:45 -0400 Message-ID: X-Original-Return-Path: Received: from imo-r10.mx.aol.com ([152.163.225.106] verified) by logan.com (CommuniGate Pro SMTP 4.0b6) with ESMTP id 1700687 for lml@lancaironline.net; Tue, 20 Aug 2002 06:34:35 -0400 Received: from Sky2high@aol.com by imo-r10.mx.aol.com (mail_out_v33.5.) id q.15e.1285e051 (4418) for ; Tue, 20 Aug 2002 06:34:27 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <15e.1285e051.2a937532@aol.com> X-Original-Date: Tue, 20 Aug 2002 06:34:26 EDT Subject: Re: [LML] delaminations of aileron counterweight web LNC2 X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_15e.1285e051.2a937532_boundary" X-Mailer: AOL 8.0 for Windows US sub 50 --part1_15e.1285e051.2a937532_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 8/19/2002 10:33:11 PM Central Daylight Time, gnelson@gt.rr.com writes: > Each separation was "torn" away from the aileron; i.e., the separations were > parallel to the ailerons and wing. They broke for probably two reasons; I > used undersized lay-ups of 3-ply each and I found at least four pounds of > water in the left aileron which made for a seriously out-of-balance set of > ailerons with noticeable left-turning tendency. Greg, I am a bit puzzled. Generally if the left aileron was filled with water it would be heavier thus yielding left down and right up - a right turning tendency. After your repair and paint, did you rebalance the ailerons? Did you ever fly in below 0C temperatures whilst water was in the aileron? If so, the internal bonding may be in question because of the water freezing and expanding. Have you left large holes in the web at the point where it meets the spar and cw support (bottom) so no water collects in that area? Flutter or even aileron system lash can usually be felt in the stick, did you have such sensations? Lash can be eliminated or reduced by rigging both ailerons to fly just a hair high thus putting a slight airload on both. Do you have a trim tab in the left aileron? Finally, where did you the original drains and where did you put the new ones? Scott Krueger LNC2 N92EX --part1_15e.1285e051.2a937532_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 8/19/2002 10:33:11 PM Central Daylight Time, gnelson@gt.rr.com writes:

Each separation was "torn" away from the aileron; i.e., the separations were
parallel to the ailerons and wing.  They broke for probably two reasons; I
used undersized lay-ups of 3-ply each and I found at least four pounds of
water in the left aileron which made for a seriously out-of-balance set of
ailerons with noticeable left-turning tendency.


Greg,

I am a bit puzzled.  Generally if the left aileron was filled with water it would be heavier thus yielding left down and right up - a right turning tendency.  After your repair and paint, did you rebalance the ailerons? 

Did you ever fly in below 0C temperatures whilst water was in the aileron?  If so, the internal bonding may be in question because of the water freezing and expanding.

Have you left large holes in the web at the point where it meets the spar and cw support (bottom) so no water collects in that area? 

Flutter or even aileron system lash can usually be felt in the stick, did you have such sensations?  Lash can be eliminated or reduced by rigging both ailerons to fly just a hair high thus putting a slight airload on both.

Do you have a trim tab in the left aileron? 

Finally, where did you the original drains and where did you put the new ones?

Scott Krueger
LNC2 N92EX --part1_15e.1285e051.2a937532_boundary--