USS Blueback SS-581 recovered from North Lake, Groton Sub base

[QuarterMaster]

I usually add a drop of Stuph or Corrosion X to the outside to protect it too. D

Adding it to the checklist!

[bigdave]

Here is my Deep Six trophy. Lol

[salmon]

Me with sub

Me with trophy minus sub

Despite the loss it was a great time!

[bigdave]

I think I see a bit of unsinsarity in that smile.
If that's even a word. Lol. BD

[wlambing]

But does it stink??? My Trepang was hideously rancid after 6 weeks in Ninigret Pond in RI. Took months and many washings to to get rid of the odor. Almost like they have underwater skunks there!


"Stainless" steel is really a mis-nomer! The stuff is prone to rusting, will stress-crack in salt water environments, and has some other nasty traits when exposed to galvanic coupling. But, until something else better comes along, or gets less costly, we'll use the hell out of it!!!

Yes, North lake is "brominated", a less human lethal form of germ killing. The distribution piping for the system can be seen as a large Tee when you're up on the speaker's platform above the bank on the pavilion side. The system was running that day. You could see the turbulence above the ports in the tee while we were running.

B^)

[vasily]

"Stainless" steel corrodes very nicely, thank you. It has a galvanic potential of .5 which is about the middle of the anodic indiex. Anything towards either extreme of the anodic index will react, and the further away the galvanic potential the more reactivity. A difference of .2volts is enough to cause those little ions to start moving between the anode and cathode. Dissimilar metals and alloys have different electrode potentials, and when two or more come into contact in an electrolyte, one metal acts as anode and the other as cathode. The electropotential difference between the dissimilar metals is the driving force for an accelerated attack on the anode member of the galvanic couple. The anode metal dissolves into the electrolyte, and deposit collects on the cathodic metal. External electrical current is not essential, but it accelerates the process.
I note from other sources that one of the advantages of stainless is that it can be very highly polished. The polishing process reduces the exposed surface area.
Incidentally, are your battery connections exposed to water? That would be a great galvanic accelerator.

Here is a chart I have come to treasure from Wikipedia: https://en.wikipedia.org/wiki/Galvanic_corrosion

Anodic index[Metal
Index (V)

Most Cathodic
Gold, solid and plated, Gold-platinum alloy −0.00
Rhodium plated on silver-plated copper −0.05
Silver, solid or plated; monel metal. High nickel-copper alloys −0.15
Nickel, solid or plated, titanium an s alloys, Monel −0.30
Copper, solid or plated; low brasses or bronzes; silver solder; German silvery high copper-nickel alloys; nickel-chromium alloys −0.35
Brass and bronzes −0.40
High brasses and bronzes −0.45
18% chromium type corrosion-resistant steels −0.50
Chromium plated; tin plated; 12% chromium type corrosion-resistant steels −0.60
Tin-plate; tin-lead solder −0.65
Lead, solid or plated; high lead alloys −0.70
2000 series wrought aluminum −0.75
Iron, wrought, gray or malleable, plain carbon and low alloy steels −0.85
Aluminum, wrought alloys other than 2000 series aluminum, cast alloys of the silicon type −0.90
Aluminum, cast alloys other than silicon type, cadmium, plated and chromate −0.95
Hot-dip-zinc plate; galvanized steel −1.20
Zinc, wrought; zinc-base die-casting alloys; zinc plated −1.25
Magnesium & magnesium-base alloys, cast or wrought −1.75
Beryllium −1.85
Most Anodic

[Fishtale]

Curious why there's algal growing on the surdace of the WTC when it's inside the hull where the sun doesn't shine...

Actually, when I opened up the hull, the material adhered to the WTC looked the same as on the outer casing so I just called it algae. However, you're probably correct, it may have been a combination old decaying plant matter and fine silt that found its way inside the hull. Stuck on there pretty good too.

Richie

[tommydeen]

Dave. To answer your question no couldent find toms sub i bought a hook4x last spring to try it out. Fishing sonar is to a level now where i could pick up good detail on the buttom ie champain glasses and beer cans clearly and in detail!! But doing a couple hours of sweeps at a time i never found it. I will try next summer

[QuarterMaster]

Not as short as I'd like, but hoping it proves informative.

SUB LOST: USS BLUEBACK SS-581, a "Special" Report

Another in the "Not so reality TV" Series brought to you by.....
INDIVIDUAL ANEMICS
Electric Model Boat Division
...a "sub" Division of MRCSB (where the rent is TOO DAMN HIGH!!

[bigdave]

Hi Ed
Just watched your video,
Could you post more on the Atomic tape you mentioned?

Plus I am no Manley cylinder expert but it looks like the center section you thought was bulged was worped. Plastic will tend to do that if not supported.
Just my theory.

[QuarterMaster]

Hi Ed
Just watched your video,
Could you post more on the Atomic tape you mentioned?

Plus I am no Manley cylinder expert but it looks like the center section you thought was bulged was worped. Plastic will tend to do that if not supported.
Just my theory.

Just "saw" this lol!!


I usually grab rolls of it at the boat show. Goes by "Rescue Tape" as well (same stuff)

Rescue Tape

The "How to" Video

I've been using it since '02 on each and every sailboat I owned. I always purchase at a boat show for the best deal.
I keep it onboard, in the car, in the house, my Submarine "Field Kit", even in my "bug-out bag"

Technical Data
Property Test Method Mil Spec Min. Performance Test Results
Operating Temperature Range -65° C to 260° C -65° C to 260° C
Continuous Temperature Range -60° C to 200° C -60° C to 200° C
Cold Brittle Point -65° C -65° C
Hardness Shore A ASTM D2148 50 50
Tensile Strength, Min. ASTM D119 700 PSI 950 PSI, +/- 25 PSI
Elongation, Min. ASTM D119 300% 800%, +/- 50%
Tear Strength, Min. ASTM D624, Die B 85 ppi 85 ppi
Bond Strength, Min. MIL-I-46852 2 lbs 12 lbs
Cold Brittle Point, Max. ASTM D746 -65° C -65° C
Water Absorption, Max. MIL-I-46852 3% By Weight 3% By Weight
Dielectric Strength, Min. MIL-I-46852 400 v/mil (8,000 Volts/20mil) 400 v/mil (8,000 Volts/20mil)
All Technical Data testing performed by third-party facility: 2009 Imanna Laboratory, Rockledge, Florida

[QuarterMaster]

...and this is ALL I have to say on that.

USS BLUEBACK SS-581: FINAL Refit Log 2016-11-30 (1:96 SWM)

Another in the "Not so reality TV" Series brought to you by.....
INDIVIDUAL ANEMICS
Electric Model Boat Division
...a "sub" Division of MRCSB (where the rent is TOO DAMN HIGH!!

[QuarterMaster]

Sorry, wrong shout out...
"Marcus: SubCommittee Board" s/b "Manfred: Sub-Driver Board"

My bad, my apologies!

[scott t]

Excellent video. Will you show how you attached springy bearing strut assembly to boat hull.
Thanks,
Scott T

[QuarterMaster]

Excellent video. Will you show how you attached springy bearing strut assembly to boat hull.
Thanks,
Scott T

Unfortunately, I'm kinda wrapped up on the BLUEBACK (literally) as its boxed and getting ready for transport.

BUT, it's simple enough to see from this picture:



Can't help with a source for the Nylon bearing itself, as I pulled it out of a junk box. But a flanged Rulon bearing from McMaster Carr and appropriately sized brass tube would be better anyway.

After I silver-soldered the brass tube to the 1/4" strut, Inserted the bearing. I then of course I bent the strut to shape. Assembled EVERYTHING and made the final adjustments.
It was only at that point where I was satisfied with the fit and rotation of the shaft did I apply the Marine Tex to permanently mount the strut while everything was assembled. Just remember the LAST step is your mounting compound AFTER assembly!

Marine Tex is another great crossover from the Marine Boating Industry that I happened to have lying around. It's a bit pricey and JB Cold Weld would do as well. But I use the "Tex" on larger jobs as it lends itself to those applications.

Marine Tex

Available at Ace Hardware ($$), WestMarine ($$$) etc.

Hope this helps.