Originally Posted by
blackmail
...
5) expressed in formulae: winglets artificially increase the AR( aspect ratio)
AR= b/cm = b2/S : b.b=b2 & cmxb= S
b= wingspan in m(meters) & cm = wingchord in m(meters), S= wingarea in square meters.
also cdi(induced drag coefficient)= cl square /pi. AR. e
cl= liftcoefficient, pi = 3.14, e= efficiency factor(real wing is not identical to a prandtl wing, which has an optimal elliptical winglift distribution à la spitfire)...
Agreed that the effective AR increases, which is akin to saying the spanwise centre of lift has moved outboard, isn't it?
In that case the centresection bending moment has increased, hasn't it?
