Thanks for the sensible replies.
I expected a bit of flaming, but not with such creativity.
To answer some comments, and For those of you interested in the bigger
- By pumping fluid into external bladder, volume increases, mass doesnt,
therefore density decreases.
- My intended use is as a deep-sea scientific research / imaging platform,
not a "model" to look at and enjoy. FYI: Excepting widely spaced depth
measurments, Most of the ocean floor is an undiscovered, unexplored and
unique ecosystem that my "model submarine" could cheaply discover. As an
autonomous, roboitc platform, it does not need "remote control" in the
classical sense. There are already similar prototype vehicles being
developed, for shallower environments. Most, unfortunately, are more
interested in defence, not exploration activities.
- Just because no one has ever done it before, and I sound naive, doesnt
mean it cant be done with appropriate engineering... it is, after all, a
simple case of the physics of pressure, friction, metal, liquid and energy.
( And btw, I'm a defence engineer). There are plenty of SCUBA diving
cylinders capable of 1/2 my working pressure, and as someone pointed out,
diesel injectors also approach the pressure ballpark I desire.