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Bo Thisted,

the zigzag tape you got is called "turbulator tape". It helps to trip the
turn-back flow under the front of the leading edge, improving laminar flow
across the entire top of the wing. Mike Campbell claimed a 6 knot
improvement in speed in a article in the august 94 edition of "sport
aviation". Where you put it is critical. Too deep under the tip and you will
be out of the turn-back flow. too close to the leading edge and you will
trip the main flow over the top of the wing and that is very bad (high stall
speed, high drag, or worse). you can find the turnback flow region by
putting oil under your leading edge and studying the air pattern after a
flight, or copy another builders location that works well.

Scott Dahlgren

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