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Hi David,
I followed the post about the hard ballast tank. You're
right, but the hard tank does not have to be outside. Mine will be inside with
about 650 # of bouyancy capability!
Also got some good news yesterday, The machine shop called
and the window seat is now machined in my transition cone. If I have time I will
be picking it up today!
Best Regards,
Jim K
----- Original Message -----
Sent: Tuesday, January 06, 2009 3:44
AM
Subject: [PSUBS-MAILIST] tanks
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?
David Bartsch
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