winglets- whats the point in not having them!!
hello all, i hope someone may be able to enlighten me on a question i have been asking myself!
Taking into account that winglets singnificantly reduce the amount of drag that is created on the wing tip hence increasing fuel efficency hence more money why aren't all a/c equipped with them!?!
I assume it will have something to do with stability or maybe for structural reasons... I know it is potentially a silly question but i cant come up with solid answer!
Thanks