Here is the video showing all 4 e-tubes popping.
The first to go, at ~95m, was the 6 3/4" tube with my original end caps. One of the caps floats around for a bit showing that it failed. (Sadly the bags I put the tubes in also failed and most of the shrapnel is at the bottom of the lake.) The E-tube was also destroyed.
Next at ~103m, is my original e-tube at just over 7" (180mm). Its end caps were the same as the standard OROV 2.4 caps, except:
- An additional 1/8" disk on the inside of the cap giving a smooth surface for the additional o-ring placed between the end of the tube and the end cap.
- 2 types of o-rings. the original OROV 2.4 type and the one I mentioned above. (though the other end had only the new o-ring)
At 107m, the 6 1/2" e-tube with 1/2" end caps (same as previous), but this only had the 1 o-ring per end cap. This and all the rest have the o-ring I was testing (between the end of the e-tube and the end cap) and they do not have the original o-rings. One more thing, these last 2 tubes had hot glue around the end caps.
At 130m, the 6 1/4" e-tube with 7/8" end caps
At 228m, the last tube passed the test quite well. It was the e-tube on OpenROV#272. :) The tube itself is 6" long and its thickness is 1/4" (twice the thickness of the standard tube. And it doesn't cost much more.) The end caps were 3/4" thick and had the new o-rings.
Video below shows #272 go to the bottom of the lake. Or rather it continues to show everything but itself. Sadly the raspberry pi would not connect. I had a lot of trouble with connections on the 3 previous attempts (I will give details later). The main issue is that I have 2 pairs of homeplug adapters and they will connect to what they want to rather than what you want them to connect to. I had separate power for each but on the last day they would not connect and I was out of time. I adjusted the position of #272 and he went solo. What a champ!
I will update this post later with more details and make sure I answer all of Eric's questions from the first post. :)
This is my science vessel. In answer to your question, I sit right where the orange jacket is. And the plastic bag has my pink laptop in it.