|Quoting Skydrol (Reply 2):|
Sure they can have it. On the Beech 1900D as an example:
Those aren't winglets as such. They are there to augment the vertical stabiliser (which is the same as a King Air stab. and is too small for the a/c) and to enhance the aircraft's stability in a one-engine-out situation (they are in line with the engines). A winglet's function is to reduce drag associated with tip vortices.
Here is an earlier discussion of this topic:
Winglets On Tail? (by 777DadandJr Mar 31 2005 in Tech Ops)
Monty Python's Flying Circus has nothing to do with aviation, except perhaps for Management personnel.