On 2015-01-08 18:43, hank pronk via Personal_Submersibles wrote: > Vance 4/3 pi R cubed is 1.33 X 3.14 X 46656 = 194844.78 cubic inches divide by 277 = 703.41 imp gal at 10 lbs per gal = 7030lbs > Hank-------------------------------------------- > Hank, you used a 36" radius, or a 72" sphere. Sean