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From: RWolf99@aol.com
Message-ID: <7299f277.249670b2@aol.com>
Date: Mon, 14 Jun 1999 10:50:26 EDT
Subject: Control Surface Balancing
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          <<  Lancair Builders' Mail List  >>
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>>

In a message dated 6/13/99 9:48:51 PM, you wrote:

<<The elevator control surface balancing is done to keep control pressures on 
the stick constant when the aircraft is experiencing G forces.>>

NO! NO! NO!

Control surface balancing is done to prevent flutter.  Please don't even 
THINK about ignoring this.  While there may be an impact to the 
stick-force-per-G curve, as Ed suggests, the primary purpose of balancing the 
movable control surfaces.is to keep the airplane in one piece by preventing 
flutter.  The bob-weight is the thing that increases the stick-force-per-G.

Note that "irreversible surfaces" (ones where the aerodynamic load cannot 
change the surface position) do not require balancing.  Flaps are one 
example.  Hydraulically-boosted control surfaces are another, but there 
aren't any of those in Lancairs ..... yet!

- Rob Wolf
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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