ORIGINAL: mithrandir
winglets are for making a plane (specifically a wing) more efficient if there is a span limitation....
and the more effective a winglet is.. the more damaging it will be in the off-design condition...
Do wingtip fences/SFGscontributeto thisnegative effort, to an extent?Or is it the case that since they are symmetrical above/below wingtip chord the negative effects cancel out?
Iguess the better question is - what are the overall effects of the SFGs? We know why they are being used, but what are they actually doing from an aerodynamic standpoint?