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Im only a newbie J but I know the Stew From: owner- No, I don't recognize the name. Jeff
Prentiss went down from HBOI at one time to try and get the thing running, but
it was hopeless, according to him. That's all I ever knew about it in those
days. Vance -----Original
Message----- Thank you do you know
a gentleman named Robert Carew he had piloted PRV2 the few times it was
in the water, I understand he is around or was a while ago he is supposed to
have some pictures of the sub in the water, again thanks for your help Brian V. Ryder From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of vbra676539@aol.com Let me make a call. I'll get back to you
on that. Vance -----Original
Message----- Vance thank you for
your advice, I think I was more concerned with the weight and over engineered
the mounting but with you comparison to a shackle it does make sense are there
any drawings of the locks available for review, no sense in reinventing the
wheel. Again thanks for your
help Brian V. Ryder From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of vbra676539@aol.com Brian, Three? Why so many? The Perrys with
releasable pods used a centrally mounted hydraulic cylinder with a solid SS
billet draw pin screwed onto the rod end. The billet rides in a sintered bronze
bushing. The front and back pipe frames and pads you see in the photographs
are there for the pressure hull to sit on, and to maintain alignment. Once the
sub is off the deck, each pod is supported entirely on the release pin. It
sounds odd to the layman, hanging a ton and a half off one pin like that, but
have a look at any 5-ton shackle. That pin isn't much bigger than your finger. Alternatively, the PC14 class used a
forward mechanical release and an aft pivot. You could make that hydraulic
easily enough. Either way, you would almost certainly do very well with
just the one release cylinder. Our subs were slammed and banged plenty on deck,
and we never had problems with the release pins Luckily, no one ever had to jettison a
pod. We brought some extra water home a time or two, but we did get home.
I don't know how many dives the Deepworkers have made collectively, but I
suspect it is a pretty high number and I have never heard of anyone dropping
the undercarriage on one of them, either. That also is a mechanically operated
release. One final note is that all of these units were built in the shop
during fabrication, minimizing costs while maximizing QC. Vance -----Original
Message----- Hello everyone not to
get off the thru hull discussions it makes for interesting reading I have
another question for all you experienced submariner I am looking for a
Hydraulic release pin to drop the new PRV2 battery pods the pods are
large 20” by 12’ and are made of steel just like the Perry pods (I thought
about aluminum until the price came back 1090.00 dollars per foot) so steel it
is, I think I could do it with 3 per side but I am having trouble sourcing
them, also looking for an underwater telephone if anyone knows of a unit
kicking around. The sub is coming along very nicely and I will be uploading
pictures as we progress also thanks Jon for coming down. oh and we are also in
the market for a hydraulic manipulator or parts and pieces I can attest to the
ABS price we were quoted 50k plus the inspectors payroll and travel
expenses I guess a blessing is expensive Regards Brian V. Ryder From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Al Secor I’m sure Carsten would! Al From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Jay K. Jeffries Alec, That is a great
summary of the situation. I think pins need to be defined one through
four and what connects to a pin as most connectors are keyed to connect in only
one orientation. As an aside, does
anyone know how many wires are involved to connect one of the Hummingbird
sidescan transducer through hull? R/Jay From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Smyth, Alec I'll attempt to
summarize and respond to the various discussion items in one post. To
summarize, of course there will be applications for all sorts of additional or
different connectors for thrusters, lights, more advanced sonars, etc. All we
are trying to standardize on here, however, is a basic connector for
communications. Let's keep it simple. We just want to be able to
communicate with or between PSUBS and if someone wants a sonar array,
video cameras, etc. those simply go through whatever connectors they want to
use. Those things are beyond the scope of this
proposed standard. OK, I'll summarize. 1. What thread is
it? I just called
Subconn to confirm, it is 7/16" x 20 UNF 2. Is there an off
the shelf pipe coupling to screw into? Not that I'm aware
of, because this is a parallel thread whereas most pipe couplings use tapered
threads. I did locate some straight thread fittings on McMaster.
However they are not stainless and the diameter is insufficient for the
o-ring seat. It is really simple to make your own. Just drill and tap a
piece of 1" 316 round stock long enough to go through your
hull and take a fillet weld on each side. If you want a more flexible yet
harder-to-make solution, use a removable bulkhead. See the fifth photo from the
top on my Snoopy project page for an example. If anyone wants the drawings
for those, I'm happy to supply them. If anyone has a source of off-the-shelf
female-threaded, thick-walled little cylinders in 316 of course let us know. 3. Can we
accomodate different pin count connectors using the same hole? The connectors with
2 through 5 contacts use the same thread (I didn't pick the 5 contact conductor
because it's current capacity is too low for some of David's equipment).
Beyond 5 conductors, the thread size increases so you would need a
different hole. I don't think there's enough difference in diameters
for an adapter. Plus, as these are parallel threads you would need an o-ring in
the adapter, which complicates it a little. Off the shelf pipe adapters won't
work due to their tapered threads. So... if you need additional connectors use
either a multi-connector removeable bulkhead, or weld in a variety of
threaded cylinders and screw blanks into the spares. 4. Merits of plastic
vs. metal I have used both
types for years. I agree with Vance's preference for metal, because I
recently broke one of my plastic connectors. I'll admit it was purely
my fault, I over-tightened it with a wrench when one is only supposed to
hand-tighten only. Metal connectors like this one are less
exposed to my stupidity. The one thing I disagree with Vance on is
that plastic ones are dirt cheap. They were when I bought them years ago, but
now I was quoted higher prices for those than for this one. 5. Need to agree on
pin assignments, not just connectors Excellent
point. Let's make an executive decision: black and white for comms
transducer, red and green for hydrophone. Unless I'm mistaken, polarity doesn't
matter in either case so it's just the pair assignment that counts. 6. Don't we need 4
pins for comms? No, I don't believe
this applies. My assumption is that our comms are wireless. Wireless
comms use the same transducer for both ingoing and outgoing signals. So long as
we are on the same frequency, all divers and subs can hear each others'
conversations. We should agree on a frequency, but that's immaterial to
the connector choice. BTW Divelink is single frequency, but OTS has a
choice of several. As I understand it, one of the OTS channels coincides
with Divelink, so we should all be able to converse if we adopt that one. 7. Is this ABS
certifiable? I'm not sure what
ABS requirements are for certifying connectors. I do know however that this
particular product line is Subconn's oldest and has been around for decades. It
is surely used on certified subs. 8. What size is the
O ring? It's 1/2"
ID, 5/8" OD. In other words, the seat for the connector has to be larger
than 5/8".
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of ShellyDalg@aol.com Hi Guys. Boy, I had a feeling this would get more
complicated. The additional ideas all sound pretty
reasonable to me, and standardization will be necessary if we want to plug in a
radio for the convention. I don't think anyone wants to spend $50K
doing it though. Lets try to keep this simple. As a minimum standard for this
application, all we really need is "what size is the welded coupling"
and we can screw what ever comes along into it. If we don't use it, it just gets a hard
plug with pookie. I would suggest we make the coupling big
enough to accomodate a multi pin plug. I favor a 1 inch coupling size only
because it would be large enough to accept mostly any size. It's easy enough to
add a reducer bushing into it and still leave enough room for multiple pins. The proposed Subcon part looks fine for
the convention radio, and even has two extra pins. As for ABS cert.........much like what we
already use as guidelines, it doesn't need to pass any tests but just be
"up to the standards" of ABS. Frank D. No virus found in this incoming message. |