First of all I am trying to find a "derivation??" for the Magnus force that affects rotating cylinders and spheres passing moving through air. By derivation, if it is not correct, I mean a proof, something showing how the function was created. I have found the magnus force quite easily by searching through the web and it seems to be: fm=S(v)ω^v As I said I need some kind of equations leading to this formula. Also I am wondering if anyone here is familiar with solving boundary layer equations (numerically) as I have a need for doing that but am unable to. I understand my language is not perfect and I urge you to ask if there is something that is not fully understandable.