Mailing List lml@lancaironline.net Message #51272
From: Bill Hannahan <wfhannahan@yahoo.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: Balancing MkII Elevators
Date: Tue, 28 Apr 2009 10:00:48 -0400
To: <lml@lancaironline.net>

I requested from Lancair agreement to make this change in 1991. It was rejected without explanation.

 

Maybe just CYA, or an issue with torsional stiffness of the rudder, or a change in vertical fin resonant frequency, I don’t know. You are the engineer. Good luck.

 


Regards,
Bill Hannahan


--- On Thu, 4/23/09, Bob Smiley <rsmiley2@centurytel.net> wrote:

From: Bob Smiley <rsmiley2@centurytel.net>
Subject: [LML] Re: Balancing MkII Elevators
To: lml@lancaironline.net
Date: Thursday, April 23, 2009, 6:40 PM

A suggestion,
 
I did this on my 360 on the vertidal stabilizer.  The couterweights were placed on the leading edge of the rudder and in the counterweight overhang on top of the rudder.  The moment arm on the leadig edge was about 2 inches verses about 6 inches thus you need only about 1/3rd the weight on the top of the rudder.  My solution was to add 1.5 inches to the height of the rudder and vertical stab.  More room for more lead. overall weight was reduced.
 
An addditional benefit I received was I increased the demonstrated cross wind component for landing.  I landed in a 24 knot crosswind at Jackson Hole Wyoming one time.
 
Bob Smiley
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