Correct me if I am wrong gang but I have always been taught that winglets were
designed by NASA to reduce/eliminate induced drag caused by high pressure air
attempting to flow around the wingtip instead of smoothly out the trailing edge
from the underside. These wing tip vortices cause disrupted airflow on the
upper surface increasing drag and reducing lift. The winglets relocate the
vortices to a none lift portion of the wing, resulting in no disruption to the
boundary layer flow, effectively increasing the lift area without having to
increase the wing area, just add the tip. I much cheaper fix then adding more
wing area etc...
Colin Rainey KR2(td)
crain...@cfl.rr.com
Sanford, Florida
FLY SAFE!!!!
