underwater quad-copter

[He Who Shall Not Be Named]

https://youtu.be/K_wiVdY5BWU

OK, I've seen it all now.

M

[QuarterMaster]

Just like the Flying Sub, only different!!

[He Who Shall Not Be Named]

Just like the Flying Sub, only different!!

And this one actually works in the two fluids.

M

[trout]

You can do it too!

[He Who Shall Not Be Named]

You can do it too!

In the day it was marketed as, Stumph (spelling?).

M

[trout]

So, why not use it in our subs? It wouldn't hurt, unless it will cause a reaction with the polycarbonate tube. If it did not cause a reaction, it might save equipment if someone did something stupid like not put an end cap all the way on or some other mistake at lakeside?

[greenman407]

What are we talking about? Use what in our subs?

[He Who Shall Not Be Named]

I've used stumph, and it works, but I found that wet gear (other than unsealed chokes, potentiometers and the like) only need a fresh-water soak-down followed by a blow-down, followed by denatured alcohol soak followed by a blow-down good enough to get the electronics back up to speed.

Iron-core chokes rot on the spot -- but today almost all RF stuff is crammed onto a sealed IC chip, so it's not an issue in post 1990 gear. If the servo pot gets wet it will die within weeks.

Long-term immersion will generate mung growth between IC chip board contact points -- this has to be scrubbed off with a lacquer laden acid-brush to clean away the shorting minerals and duck-****.

M

[QuarterMaster]

I've used stumph, and it works, but I found that wet gear (other than unsealed chokes, potentiometers and the like) only need a fresh-water soak-down followed by a blow-down, followed by denatured alcohol soak followed by a blow-down good enough to get the electronics back up to speed.

Have to chime in here, I had it too, and it is called "The Stuph". That was the pink one if I remember correctly, came in a special pump bottle. It had a competitor too, which is amber in color, can't remember the name though I still have some left that actually came with me to this past Groton event. The label came off the bottle a long time ago. I always used it on my external electrical connectors, pushrod seals, Vent valve etc.
Ray Mason and I had an interesting discussion on long trip back from Groton as to whether or not we could use the "The Stuph" in the same manner oxygenated fluorocarbon (Perfluorocarbon) was used for "liquid breathing" in the movie "The Abyss". The idea being was to completely fill the dry section of the WTC with it to prevent the inevitable minor leak(s) one can never track down, Hopefully acting like a permanent lubrication for the seals, motor, etc as well. What can I say, those were some long, late night, Sunday trips from Groton!
I actually ended up testing the idea on a “SUBTECH” low pressure high volume ballast pump, the one used in the ALBACORE which I used on my SEAVIEW. The pump can use an ordinary plastic 35mm Film canister to house the electric motor so you can mount the whole pump assembly in the wet section of the hull, and just run wires to it. So I filled it with the “The Stuph” and after a dozen uses or so, I noticed it begin to get VERY dark through the translucent film canister! This of course is the particles from the brushes wearing against the commutator and what not lol. I guess I didn’t have a lot to do back then. But like Thomas Edison, I did find one way not to do something before I used it full scale!
Actually, since my return to the underlake world of model submarines, I went on line to find if it was still available, and of course came up short. I did come across Corrosion-X myself and am going with that. I’m using it on everything including my long arms. Great stuph!

“Sub” Ed