Mailing List lml@lancaironline.net Message #36015
From: Bill&Sue <5zq@cox.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: , Lancair handling characteristics
Date: Sat, 20 May 2006 17:29:01 -0400
To: <lml@lancaironline.net>
Hmmmm. Dom, I think that there may be additional differences that might have to be taken into consideration besides the small/large tail.  We have done a modification to the elevator horn (fairly common). This modification involves drilling a new hole closer to the pivot point for the push rod attach, one inch closer if memory serves. The effect of this modification is to REDUCE the stick MOVEMENT required for a given elevator deflection. At the same time it acts to INCREASE the stick FORCE required for the same deflection.
 
Another modification was to increase the size and strength of the trim springs. This mod was done in conjunction with the geared trim wheel system. This allows us adequate trim at any speed from a red line power dive to a short field flaps 40 approach at 70 knots. We did the trim wheel and big spring mod before first flight so we can't speak directly as to the "changes" produced by these mods.
 
Like you, I have flown both large tail (mk II) and small tail LNC2's and frankly don't notice much difference. I have also flown the standard trim system and find that it's inconvenient not being able to trim at both extremes, but just an inconvenience, not a hazard.
 
Finally, I think that there is a difference between "sensitivity" and "stability". I believe that one can have (and believe that we have) an aircraft that is both sensitive and stable. I wouldn't want it any other way.
 
Funny, I don't remember you over-controling. Maybe you just needed to get used to flying upside down since you were flying ours here in the NORTHERN hemishpere!  :-)
 
Bill Harrelson
N5ZQ 320 1,200 hrs
N6ZQ  IV   7.00113%
 

What I found a mystery was the over-control I exhibited in both pitch and roll axes. Mine is very stable in both areas.

Dom Crain

VH-CZJ

 

 

 

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