Bingo! After literally years of pondering, you just cleared it
all up for me. Thank you.
Stan
In a message dated 8/12/2004 11:43:39 AM Eastern Standard Time,
mwright@smallip.com writes:
The
advantage of an oil bladder over an air bladder is that it isn't
compressible and thus wont change volume as depth increases. No
volume
change means no change in buoyancy.
What you're
basically doing with the oil bladder system is changing the
amount
of air volume _inside_ the sub. The weight of the sub and the
oil is constant, so if you increase the volume of the combined
system
you increase it's buoyancy.