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Use two scuba tanks, and plumb them so you can
switch from one to another.
Don't plumb one air tank to the forward MBT and the
other to the aft MBT. If you have that arrangement and you run
out of air in either scuba tank, your going to be stuck in the sub. You
can' bring the conning tower up and out with only one MBT full of air.
You'll be stuck one end up and the other end down!
You need to have either scuba tank capable of
inflating either MBT.
Yep, The port in front of the conning tower is
a vent and the same line from the VBT to the vent is used for air fill
also.
Your also, correct that two valves in series is
"one for operation" and "one closer to the hull for safety." After you
come through the hull and safety valve, you can locate the operation valves
and plumb to it where ever it's convenient to operate it.
Dan H.
PS nice to hear your still at it and making
progress.
----- Original Message -----
Sent: Tuesday, November 29, 2011 12:43
PM
Subject: [PSUBS-MAILIST] Piping
Advice
Hi all,
Im almost finished painting my sub. What a chore. Still, it
looks good to finally see it taking shape. Anyway, after that im onto
the pipework and i'd like to ask people's advice\opinon.
This is of course the K350 design page 013 on the standard plans.
The plans show only 1 scuba tank connected to blow all 3 tanks. I
was under the impression that most people carried at least 2. I was
thinking of modifying the setup to have 2 tanks, 1 to blow aft and variable
tank and 1 for forward.
Am i right in assuming the VBT 1\2 inch pipe also serves as a vent?
On the variable vent pipe where it exits the sub forward of the tower,
why are there 2 identical valves? I assume 1 is to operate
normally, and the other as the emergency shut off connected directly to the
pipe nipple? Same with the depth gauge? (Which i dont have
incidentally).
Anyway, is this configuration the best way to go about
things? Are there any alternatives that people have used that may
be better? Im going to use the swagelock system and will of course use
SS instead of copper as it calls for.
I notice snoopy has some sort of machined manifold. Maybe this is
better?
Any suggestions from people before i pick up the phone to
swagelock?
Kind Regards
James
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