----- Original Message -----
"...enlarge the size of the
endcaps and set a cylinder between the caps. (in the way that you get a double
hull around the circumference...
Such a cylinder should met the endcaps
some inches behind the smal radius... You will lost some space but You get a
good stability and extra tank capacity..."
Guys,
This is an interesting idea; a
clever way to improve hull strength.
I've played with this sort
of design myself, mainly because I got tired of sitting in a small
cylinder. The vertically-situated double-end-cap design allows the
occupant much more room to move without the displacement / weight requirements
imposed by an entire sphere. It's also more
hydrodynamic.
I have some designs that are
basically two end caps mated to a very short cylindrical section inbetween,
just to give a bit more elbow room. I came up with some additions to the
hull that might improve hatch location and footroom. Basically, she's
built more for comfort and maneuverability than speed; kind of like a little
"underwater helicopter".