Calculate Inertial Constant K I for Sphere + 4 Disks

[GreenSabbath]

I = kMr 2
Where M is the mass of the flywheel, r its radius and k is its inertial constant.
Can I calculate my own inertial constant( a sphere + 4 disks around the sphere)

Thanks Help will be appreciated

 

[robphy]

You can apply the Parallel Axis theorem
http://en.wikipedia.org/wiki/Parallel_axes_rule

 

[GreenSabbath]

So in short I am adding weight on the side of the ball .. as mass of the wieights is increased concentration of mass is distributed more... so I decreases. I am confused I don't understand the parallel axis theorem. An an increase in alpha would obviously mean an increase in spin velocity? Yes?