Jim,

I disagree. Winglet are most effective at high angles of attack. They
significantly improve roll rate and control at low speeds. Their use on
several models of sailplanes solved the problem of the wing dropping during
the initial takeoff roll. They also decrease the speed at which the wing
stalls.

Here is a good article that may, for some, be worth reading.
http://www.soaridaho.com/Schreder/Te...lets/Masak.htm

Wayne
http://www.soaridaho.com/Schreder


"Morgans" wrote in message
...

At the speeds we fly, winglets do little to nothing. They only become
useful at higher speeds.
--
Jim in NC