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1. 06:13 PM - Winglets & Performance (Galin Hernandez)
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| Subject: | Winglets & Performance |
All;
After many flights (2 with new winglets, 2 with old wingtips) at different
power settings, I can honestly say there is no significant change in
aircraft performance. My numbers show, at best, a maximum 3kt increase in
speed with the new winglets based on GPS measured TAS at 1000ft MSL. At
2,400RPM I was getting between 138-139KTAS with the winglets and 136-137KTAS
with the old wing tips everything else being equal. Climb performance was
not changed at all, that I could measure. I am still getting around 1200fpm
climb at MGW, full power from SL to 3,000ft at 100KIAS with either wingtip.
I feel It is not conclusive enough for me to warrant buying the new winglets
to replace the old ones. But, since I already have the new winglets, I will
keep them on. I did get a tiny increase and to me they do look good. I can
tell you I enjoyed doing the test flights and "crunching the numbers"
afterwards. It made all the "theory" come alive even if nothing much was
found after it was all over. The best part was it gave me something to do
while flying instead of just burning holes in the air going nowhere fast.
:o)
Galin
N819PR
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