Mailing List lml@lancaironline.net Message #40822
From: Darryl Bretag <dbretag@dodo.com.au>
Sender: <marv@lancaironline.net>
Subject: Proud control surfaces
Date: Wed, 21 Mar 2007 11:40:08 -0400
To: <lml@lancaironline.net>
Bob
 
In your opinion,
 when the manual calls for 0.050 gap between top skin and aileron and 0.050 gap between bottom skin and aileron and 0.050 gap between top skin and top of flap and ( the factory are know saying the bottom skin can be extended straight back to the bottom of the flap with a 0.050 gap as well ) HOW much leakage through these gaps is going to
 
- slow the aircraft down ?  ----   %   ---   or loss in air speed,
 
what improvement would a 0.025 give us ?  -- %
 
what improvement would a 0.005 give us ?  --  %
 
If we had a 0.005 gap all-round and had the 0.040 proud aileron leading edge what do you think the efficiency gain would be ??????  If any  And is it worth all the effort. 
 
 And should we be looking at the flap leading edge too , ( standing proud above top skin ).
 
 Thanks in advance,
  Its great to have these comments.
 
 
 Darryl.
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