Mailing List lml@lancaironline.net Message #2594
From: <RWolf99@aol.com>
Subject: Control Surface Balancing
Date: Mon, 14 Jun 1999 10:50:26 EDT
To: <lancair.list@olsusa.com>
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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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