This is how they check if a shuttlecock is good or not. Basically if it spins perfectly then it is balanced. If it kind of wobbles, then something must be done on it. That's something I did not know they do.
This is how they check if a shuttlecock is good or not. Basically if it spins perfectly then it is balanced. If it kind of wobbles, then something must be done on it. That's something I did not know they do.