Greetings Les,
I had not seen those pictures of Jon's sub. Thanks Looks like he is using a extension to turn the top valves. He also has a website.
Sorry guys about the double email yesterday, I was having a software glitch using Hotmail on a Mac. Turns out they don't like each other. Who knew. ;)'
http://www.yel-o-sub.com/
Are your rotating thru hulls 316 SS?
Regards, Szybowski
From: lesmarki@triton.net To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] Inflatable Pontoon Configuration Options Date: Fri, 19 Dec 2008 23:01:32 -0500
Hi Brent, Jon's sub up north has side tanks, heres
his frapper site http://www.frappr.com/?a=myfrappr&id=1616212
. my rotating motor thru hulls are done, i seen them yesterday. i dont know the
price of them yet, in case someone might want a set. Les K
----- Original Message -----
Sent: Saturday, December 13, 2008 4:47
AM
Subject: [PSUBS-MAILIST] Inflatable
Pontoon Configuration Options
I
left out that I'll need two venting valves next to the hull and thru hulls for
them, just above the tubing attachment points on the hull. I can
see now that it might be better to add two outlets at the bottom of
the pontoons and place the expansion valves there instead, so to be able to
blow any water out that might get into them. There are floats available that
contain two tubes inside, one in front and one in back. These might be a
better option for several reasons.
Regards, Szybowski
From: brenthartwig@hotmail.com To:
personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] Removing Front
MBT Date: Sat, 13 Dec 2008 01:30:34 -0800
Hey Frank, I sold my
sewing machine for a MIG welder, so I'm SOL.
;)' I have a friend that
is a real pro and making these type of floats and designs and manufactures the
very custom machines that Zodiac and others use. So I was thinking of having
him make one from scratch, but he and I decided that with all the very nice
premade units that are available, we could likely find one that we could add
two large top custom vent holes in and be done with it. Since I'm
configuring these to be blown at depth if needed in an emergency, it's more
work to calculate and design.
At the moment I'm planning to
install two 2 inch ID basic vents that I can attach a short flexible
hose to, then that hose attaches to one of the 2 inch schedule 40
aluminum tube supports for the tangle guard and pontoon standing platform.
This way I don't need a extra hose on the outside of the sub, since that said
support tube can serve double duty. Then as the tube goes toward
the sub, there is a downward facing T added to the tubing with a large volume
low pressure pop off valve facing downward attached to the bottom of the T.
This expansion valve will be set at the proper level needed to keep the
pontoons inflated at the surface.
Since there is one expansion
valve on each of the two tubes that come towards the sub, they should keep me
from popping the pontoons during surface ops. Then for blowing the
pontoons at depth I feel I need to add another set of T's right next to
the sub that go down well below the bottom of the pontoons and that tube
will be curved to the shape of the hull, and at the bottom of that tube will
be a large valve that is attached to a thru hull at that point. This is so I
can operate it from inside, just like a MBT vent valve in the conning
tower. I obtained that basic idea from the two tubes that come out of
the bottom of the large plastic pipes with caps, that were used on the Dennoch
sub. http://www.psubs.org/museum/museum_sfphotos.html For
filling the pontoons with air from the SCUBA tanks, I'll have a thru hull
going right thru were one the the tangle guard support tubes attaches to the
side of the sub. This is a little more work, but will give me a cleaner look
when finished. That is the concept I have worked up to this point. I'm
sure it will need some fine tuning, once I have made a full assembly model of
it, I'll have you guys take a look at it, as well as my local
expert.
Regards, Szybowski
From: ShellyDalg@aol.com Date: Thu, 11 Dec 2008 16:48:46 -0500 Subject:
Re: [PSUBS-MAILIST] Removing Front MBT To:
personal_submersibles@psubs.org
Hi Brent. Seems like you could make your own pontoons fairly easy and
cheap. As long as they weren't necessary to ascend. You can buy rubber
sheeting and also tubes off the shelf in pretty much any thickness you
want. Making a big inner tube type pontoon should be pretty simple, and the
same guys who sell the tubes/sheets have several types of glue that bond
stronger than the material itself. That may be a good way to save some money,
and give you more flexibility on the shape.
You could also make a nylon bag for it to protect it from abrasion and
sunlight. Just sew it together on a regular sewing machine. Frank
D.
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