Apparently the diameter of the spherical bomb with the right amount of
RDX would have been too large to fit under a Lanc. It was changed to a
cylinder to reduce the diameter and the spinning used to give it
gyroscopic precision so it hit the water horizontal each time.

--
John

I believe it was changed to a cylinder because the sphere would sometimes skip
off to one side.


Dan, U. S. Air Force, retired