REFLECTOR: winglet bottoms

["Al Gietzen" <alventures@email.msn.com>]

Alan;

Just to be sure that I understand this correctly.  You made a design
modification on the version of the wings you provide because you believed it
didn't make any difference aerodynamically and looked better.  Now we find
that it does make a difference and its better that the winglets do have
"bottoms"; and it is going to cost $200 to correct your _______, I mean, to
put the bottoms back on?

I know you didn't mention anything about the standard wing version, but it
would be quite surprising if the effect would completely go away because the
wing is a foot or so shorter.

Just wondered.

Al Gietzen


-----Original Message-----
From: Alan Shaw <wingco@iu.net>
To: reflector@awpi.com <reflector@awpi.com>
Date: Friday, May 07, 1999 10:30 AM
Subject: REFLECTOR: Elevator balance, winglet bottoms


>
>
>Al Gietzen wrote:
>
>> If you are going to lump the counterweight; it's more effective to put a
>> bigger lump on the outboard end.
>
>Good advice.  I prefer prevention by painting the elevators and ailerons TE
>up... hanging from heavy gauge safety wire hooked in small holes drilled in
the
>TE ends.Trailing edge UP painting is standard practice on certified
aircraft
>controls.  If they still don't balance the canard weights can be moved
forward
>1"starting with the outboard end.
>
>Winglet bottoms:
>
>We are finally working on a mold for the winglet bottoms.  I am told the XL
>lands safer with these and I have experienced better low speed control with
>these on the 173/LW.
>
>Our part will be available in about two weeks first for our XL customers
N/C (we
>really owe it to them).  They will be $200 (like our foam filled canard
tips),
>which includes shipping, for all others.
>
>Aerodynamically our winglet bottom is the same as Velocities.  Cosmetically
the
>front is rounded to match the top of our winglets.  Structure is the
>difference.  They are FOAM FILLED pressure molded WITH the RUDDER WELLS
>co-molded in.  They are designed to hold there shape and be easier to
install,
>especially the rudder on the bottom part.
>
>Have a good day.  :)
>
>Alan
>
>
>