From: Sky2high@aol.com
Message-ID: <4637ff66.250a0c55@aol.com>
Date: Fri, 10 Sep 1999 03:25:09 EDT
Subject: Flap Warping - LNC2
To: lancair.list@olsusa.com
Mime-Version: 1.0

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
Ed,

When I built my flaps, there was a gap on the inboard half of the flap 
leading edge and the wing trailing edge when the flap was fully extended.  
This condition arose because the flap upper skin did not have enough material 
to fill the gap.

After the flap was constructed and the final bid placed on the flap leading 
edge and spar, the leading edge was "heat gun" shaped to provide for a proper 
curve during extension.  I then put 4 keepers (stiffening ribs) in the area 
where the gap would occur to ensure that air pressure could not deform the 
leading edge and cause a jam on retraction.  I have seen no warping in that 
area in the 3 years I have been flying.

Another possible solution is to extend the flap leading edge skin enough to 
eliminate the gap -- ergo, no jam could occur.

Do not take a chance in this area -- The only time this problem would show up 
is retracting from full flaps during a go-around.  This is not the time to 
have the flaps jam.

Scott Krueger
N92EX
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML homepage:   http://www.olsusa.com/Users/Mkaye/maillist.html