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Old 01-06-2013, 10:46 AM   #87
Technatic
Semi-Pro
 
Join Date: Oct 2009
Posts: 416
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Quote:
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:
Balance point:
Bp = W head * L/(W head + W throat)*10^3

Swingweight:
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).
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