Hi,
I think becaues Bae 146 have a swept angle which help to damp out the bank
which high wing provide the similar effect too but also enhanced the unpleasant
dutch roll character. So we make it adhedral to avoid the dutchroll character
which can upset the passenger.
On the other hand, the C172 didn't have the swept wing so the roll damping is
not too much to cause the severe dutchroll.
Best regards
Last edited by Mr.Vortex; 13th Feb 2011 at 04:18.
Reason: add C172 part