Frank has me thinking again...
Lets see
if I understand this as I should...
The hard ballast
tank is a tank outside of the pressure hull that is subjected to the forces of
the outside ambient pressure. To surface, one blasts air into this tank with
the vent valves closed. This forces the water down and out thru ballast tank
vents allowing the sub to become more bouyant and it bobs to the
surface...
Soft tanks are such as buckets within the sub
subjected but to cabin pressure and are used to fine tune the bouyancy and for
trim adjustments. Water is pumped from one tank to another (If more than one
is available) to control trim angle.
How does one remove
this water from these soft tanks on a small
psub?
&nb
sp;
David Bartsch
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