First, my thanks to Doug McAlister who first did this and put me on to
the idea.

I installed gap seals on all the control surfaces (top and bottom of
ailerons and elevator; both sides of rudder) and trim tabs (on the
non-hinged side) for the rudder and elevator.  I gained 6 kts IAS at FL
240 and 250.  This is where I fly most of the time and know my numbers,
power settings etc.  The lowest number I see is 6 kts IAS increase to 8
or 9 kts.  So I am claiming 6 kts.  I have taken 6 flights now with the
same results.  

Doug tufted his ailerons and observed flow that used to separate ahead
of the ailerons now separates part way down the ailerons.  

The handling seems to be the same with perhaps (maybe) a little more
roll response at slow speed.  

Source:
Eastern Sailplane
398 Miami St.
Waynesville, OH 45068
513.897.5667
fax: 513.897.5909
www.easternsailplane.com
John Murri

TAPE00051 MYLAR PROFILBAND 30mm 15M for elevators and
ailerons
TAPE00050 MYLAR PROFILBAND 38mm 15M for rudder
TAPE00090 TESA SAFETY TAPE FILM 25mm or 30mm

The mylar can be ordered in the roll or by the foot.

Layout ½ wide section on the trailing edge and sand lightly with 400
grit.  Clean.  
Apply mylar.  Apply safety tape lapping 1/2" onto the mylar.
Do not sand on area under safety tape.


To maybe prevent icing from building up on the rudder counterweight and
preventing elevator control, I also put 2 small pieces on my horizontal
stabalizer that covers the leading edge of the counterweight.
Thankfully, I have not accumulated any ice to test if this works or not.
A future report if this happens to help.

Carl Cadwell
N25CL 450 hours IVP