Stefan Melber, et. al., have just published an aerodynamic simulation of a
Standard Cirrus glider. It's a scholarly work and will not be understood by
most of us, but the pictures are informative and worth taking a look at.
You will find a link to it at
www.standardcirrus.org. It's a 1.2 MB PDF
file.
Jim Hendrix
www.oxaero.com