
The Moment of Inertia for a thick-walled Cylindrical tube with open ends, of inner radius `r_1` and outer radius `r_2`. The following formula is used: `I_x=I_y=m/12(3(r_2^2+r_1^2)+h^2)`, where:
The formula and definition are from Wikipedia (https://en.wikipedia.org/wiki/List_of_moments_of_inertia).