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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
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