OK, could you please kindly provide a formula that does this:
"Then the moment of inertia is calculated from the balance point"
The formulas for the SW are:
Bp = W head * L/(W head + W throat)*10^3
SW = Tot Weight * (Bp – Oset)^2 + Tot Weight *( 3*1,5^2*L^2)/12000
Bp = distance balance point to end of the grip. (cm)
W = weight (gram)
Tot weight = W head + W throat (gram)
Oset = the offset of the pivot point
1,5 = the approximate radius of the cross section of the racquet (=relatively unimportant).