On Wed, 4 Jun 2008 22:53:30 -0700 (PDT), "Robert M. Gary"
wrote:

Q2: Does anyone have a design rationalization *for such a
configuration, as opposed to just zero dihedral? I can appreciate why
fighters have it -- they exploit lack of aerodynamic stability for
rapid *maneuvers -- but transports that spend their whole life being
straight and level are another issue.

Negative dihedral provides a place to hang bombs ala the USNavy's A-7
Corsair II.

Yeah, there's no way you could hang bombs on a wing with positive dihedral, like
the A-1 Skyraider. :-)

Ron Wanttaja