Having been on a few, I know the disadvantages (as well as the obvious advantages) of a Ketch rig. They''re cool, but not for me.
I was wondering about yawls though. As I''m thinking of going engineless soon, the ability to ghost along under a small headsail and jigger, "air brake", and have some extra sail area to toss up or down depending on conditions could be handy, and when it''s not in use, I could still basicly sail her like a sloop.
So, other than the added rigging... What are the disadvantages?