Attrito e spin

Una interessante tabella con il COF (Coefficiente di frizione e/o attrito) di varie corde

Molto interessanti questi nuovi studi di tw:

http://twu.tennis-warehouse.com/learning_center/COF.php


A rougher ball-string interface does not increase spin and string on string movement can. In short, differences in inter-string friction become more important than differences in ball-string friction.

Recent experiments have shown that the sideways movement of the main strings during contact with the ball contributes to adding spin.