"Ramapriya" wrote
But I've heard that it's the dihedral that causes difficulties in
banking heavy cargo airplanes, and that was how the anhedral concept
was thought up. I could be wrong )

Ah....I bet that discussion dealt with "high" wing cargo planes where
all of the load is below the wing such as in the C-5 with its anhedral.
The same situation doesn't hold true for a "low" wing cargo plane where
most of the load is carried above the wing. :-) Long distance
communications is difficult....Eh?

Bob Moore