Jose Feijoo Rego

Hi, I am working on a UAV project that uses floats. I would like to model the side force of these floats in XFLR5 to perform my stability analysis, but I am unable to do so. I have tried using rudders to model the floats, however I am already using the double fin option to model the tail of the plane. I have also tried to use a second wing (biplane) with dihedral/ twist but am unable to model this side force properly. I was wondering if it was possible to somehow model the side force of these floats....