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Re: [PSUBS-MAILIST] Venting an ambient sub
Hi Pierre,
My sub will be poplar wood covered in fiberglass. Hull shape is essentially
6' long by 3' wide, looking somewhat like an overturned canoe, with a 1/4 "
thick 22" diameter Acrylic dome on top, hull ends will be tapered.
Batt. box, seat,
ballast weight, will be suspended just below the hull. Two smaller 7" dia. domes
will be added to provide vision downward. It will be powered by a
single electric
trolling motor employing a Kort nozzle for yaw control. Small diving planes will
provide pitch control. A single 80cu ft scuba tank will provide the
air. A medical
flow meter will bleed in 20 lpm, a gate valve will vent the "cabin"
air to maintain
a constant level of water with an adequate air exchange. There will be
a separate
bulkheaded ballast tank forward, with it's own controls, all of which
will be manual.
Analog instruments will include depth and tank pressure gauge, and a digital
dive computer. I live here in sunny Florida so I don't mind having
approx half my
body immersed in water. I would like to keep the water at waist level, leaving
the rest of me relatively dry. I will be diving the sub in Crystal
River and the various
springs which have very clear water with depths about 20'. Max depth
will be 2 atms. At this stage I'm just building sub components, this
will be a long labor
of love. I think that about does it. What do you think, should my wife takeout
a higher insurance policy on me. : )
Best Regards, Carlos
On Fri, Aug 22, 2008 at 6:58 AM, Marie-Andrée et Pierre
<poulin.carrier@videotron.ca> wrote:
> Hello Carlos,
>
> I have a small dry ambient sub and I'll be glad to help you on designing
> yours.
>
> Can you tell us more about your project?
>
> Is it dry or wet sub? what deep you plan to go. how will it be built? wood,
> metal, fiberglass?
>
> What thickness are gonna be the windows, etc...
>
> remember that no sub is truely ambient. at any point the hull must resist to
> a small amount of pressure.
>
> Later.
>
> Pierre "still alive but not diving" Poulin
>
>
>
>
> ----- Original Message ----- From: "Carlos Del Valle"
> <carlosd072657@gmail.com>
> To: <personal_submersibles@psubs.org>
> Sent: Thursday, August 21, 2008 6:06 PM
> Subject: Re: [PSUBS-MAILIST] Venting an ambient sub
>
>
>> Thanks Joe, I'm a newby and I appreciate any advice you guys can give.
>> I'm going to give IVCORP a call and see what type of valve they use in
>> their sportsub. Just to let you know, I'm a Respiratory Therapist and
>> was assigned to a hyperbaric unit for two of my 30 yrs in heath care..
>> If any of you have any questions about diving medicine or pulmonary
>> physiology related to hyperbaric
>> environments please let me know, I'd like to help,Thanks again Joe
>> Best Regards, Carlos
>> On 8/21/08, Joseph Perkel <joeperkel@hotmail.com> wrote:
>>>
>>> Hi Carlos,
>>>
>>> I did a little ambient research several years ago. As I recall, a gate
>>> valve
>>> fouls rather easily and is slow to operate. A ball valve may dump your
>>> cabin
>>> air much too quickly if heavy handed.
>>>
>>> I cannot recall, what IVC uses on the Sportsub (automatic pressure
>>> regulated
>>> poppet perhaps) but, whatever it is, I suspect that is what you should
>>> consider the best candidate.
>>>
>>> Good luck
>>>
>>> Joe
>>>
>>> > Date: Thu, 21 Aug 2008 10:06:06 -0400
>>> > From: carlosd072657@gmail.com
>>> > To: personal_submersibles@psubs.org
>>> > Subject: [PSUBS-MAILIST] Venting an ambient sub
>>>
>>> >
>>> > Hi all,I know most of you are into 1 atm subs,but I need a little help
>>> with my
>>> > "want to be sub". It will be similar to ivcorp's solo sub, I calculated
>>> > > my
>>> > minute volume @ 18 liters/min,(700cc tidal volume X 20 >
>>> > breaths/min).That's
>>> > how much I will be bleeding into the sub.To vent that amount can I use
>>> > a simple gate valve to do it?
>>> > I figure I can start the flow, then adjust the gate valve until the
>>> > level of water in
>>> > the sub remains constant.This will ensure that I have a constant >
>>> > exchange
>>> of
>>> > air. I will have a separate ballast tank forward to control buoyancy.
>>> > Trying to build a water/air tight batt. box is another issue.
>>> > I would greatly appreciate any advice you guys can give,Thanks
>>> > Carlos
>>> >
>>> >
>>> >
>>> >
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