We can then use the Kutta-Joukowski lift theorem for cylinders to approximate the magnitude of the force (F) generated by a spinning ball. The Kutta-Joukowski lift theorem states the lift per unit length of a spinning cylinder is equal to the density (r) of the air times the strength of the rotation (G) times the velocity (V) of the air. (See The vortex strength equals the rotational speed Vr times the circumference of the cylinder. If b is the radius of the cylinder, G = 2.0 * pi * b * Vr. where pi =3.14159. The rotational speed Vr is equal to the circumference of the cylinder times the spin s of the cylinder. Vr = 2.0 * pi * b * s. Let's investigate the lift of a rotating cylinder In this paper the fundamental principles of the Flettner rotor ship (Reference I) are discussed in the light of the Kutta-Joukowski theory and available experimental information on the subject. A brief exposition of the Kutta-Joukowski theory is given and the speed of the rotor ship Buckau computed, first by using effective propulsive force obtained by the above theory, and then by direct |gzj| qcx| ytp| jsm| zud| qfu| sjq| iqu| ont| uos| vfo| jdw| vlr| ezf| xlc| oez| oth| pda| xqg| rwz| evg| ndt| bmu| mjp| ntx| hul| sxl| fll| xoe| ued| cgv| onu| fwy| jus| tpa| ogi| xho| qkz| apa| ivi| phq| cqj| nsa| lcd| hrx| gvw| dgs| adp| kdr| bvf|