You were downvoted because your calculations were for regular sails, and sailboats, instead of for Magnus effect.
Wikipedia says:
F = L*rho*v*2*pi*r^2*omega
where L is the length of the cylinder, rho is the fluid density, v is the fluid velocity, r is the cylinder radius, and omega is the cylinder angular velocity.
What angular velocity are you assuming in your calculations?
Wikipedia says:
where L is the length of the cylinder, rho is the fluid density, v is the fluid velocity, r is the cylinder radius, and omega is the cylinder angular velocity.What angular velocity are you assuming in your calculations?