Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Wed, 03 Dec 2008 21:15:23 -0500
Message-ID: <redirect-3329739@logan.com>
Received-SPF: none
 receiver=logan.com; client-ip=216.200.145.38; envelope-from=bknotts@buckeye-express.com
From: "F. Barry Knotts" <bknotts@buckeye-express.com>
Reply-To: bknotts884@earthlink.net
User-Agent: Thunderbird 2.0.0.18 (Windows/20081105)
MIME-Version: 1.0
Subject: Re: [LML] IV Elevator ends
References: <list-3325954@logan.com>
In-Reply-To: <list-3325954@logan.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Bill Wade wrote:
> This picture shows the end of the LH elevator- --
Bill,
I've had difficulty interpreting your photograph, but your description 
is similar to a problem that I have with my horiz stab and elevator not 
matching at their relative distal extremities.  (Lancair IV-P, started 
in 2002 at the Builders' Assist.)  I had ascribed it to over clamping 
the main portion of the elevator when it was closed out at the Builders 
Assist.  The result is a depression in the neck of the elevator (just 
inboard of the weight) and a ballooning of the area where the weight is 
located.
I think that the horizontal stabilizer is also distorted at the outboard 
end.
I talked this over with Lancair.  (I don't remember who I talked with.)  
They said, in essence, "They're all like that.  But it's really not 
aerodynamically important."  I've seen a lot of IV's and I don't think 
any are like that when they are finished.
I had resolved to grind down high spots (around the counter weights), 
reinforce the weakened carbon fiber and micro the low spots (close to 
1/4 inch.) in both the elevator and the horizontal stab to make them 
match and not have a "dip" in the middle.  Looks to me like a really 
thick layer of micro (up to 1/4 inch) will be needed.
I haven't tackled that task yet, 'cause I was hoping someone would find 
(and teach me) a better way.

Barry Knotts
LIV-P, Conti TSIO-550, building.