Sail lift- and drag coeficients

I am looking for lift and drag coefficients to determine driving and heeling forces. I have seen the part with the "Hazen model" in "Principles of yacht design" but this seems to be VERY inaccurate to me.
For instance the lifting force for the jib is rather low. I expect it to be much higher than the main due to the downwash of the main.

In principles of Yacht design also some improvements are mentioned which i could nod find (the paper of C.L. Poor and a publication regarding blanketing of the sails). Is there any body out there who can help me to get these paper or a different and more accurate calculation method?

I am also looking for coefficients for genakers. I coeld not find any information about that yet. does any body know how to calculate for those types of sails?

 

is there realy nobody who knows a better calculation method for sail lift and drag than the Hazen model as in "Principles of Yacht design"?

There must be a better way.... Please help!