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Hi Cliff,
Thanks. I particularly wanted to hear about yours since its
configuration most closely resembles my own. I was looking at your
drawing and ballast system earlier this morning. In B, did you mean to
say with your MBT's fully flooded instead of purged that the water level is
8" from the apex? Or am I misunderstanding something?
Jim
In a message dated 4/19/2012 10:54:57 A.M. Central Daylight Time,
cliffordredus@sbcglobal.net writes:
A. For the R300, the MBT's hold 7.6 scf of air. They flood in 30
seconds. I have 2" NPT flood openings and 3/4" NPT vent openings.
B. My MBT's are designed to be either fully flooded or fully purged.
With my MBT's fully purged, the water level on my dome is about 8 inches
from the apex. I use my VBT to get neutral and submerge.
C. At depth, I only use my VBT to surface. I can, in an
emergency, use my MBT'S but I do not like to do this as it generates an
uncontrolled ascent and consumes a lot of air.
Cliff
Sent from my iPad
Gentlemen:
A. When you are on the surface and ready for your ballast tanks
to fill, what fill rate in gallons/liters per minute are you designing for
or experiencing? In general, how long does it take for your tanks to
fill to the level you want for initial dive?
B. How are you determining when you have reached any given
percentage of fill? Are you aiming for neutral buoyancy, slightly
negative, or even slightly positive? If so, how much?
C. When you are submerged and ready to blow your tanks in order
to surface, what blow rate in gallons/liters per minute (of water) are you
designing for or experiencing at a given depth?
Thanks,
Jim |