  The case of a rotating object traveling through viscous fluid appears in many
phenomena like the banana ball and missile movement. In this work, we build a
model to predict the trajectory of such rotating objects with near-cylinder
geometry. The analytical expression of Magnus force is given and a wind tunnel
experiment is carried out, which shows the Magnus force is well proportional to
the product of angular velocity and centroid velocity. The trajectory
prediction is consistent with the trajectory record experiment of Magnus
glider, which implies the validity and robustness of this model.

Fluid Dynamics