Tourist mini sub missing off titanic

[pmax]

Originally Posted by cockerpunk

in one of he marketing videos for ocean gate they talked about how exciting and innovative and involved the "mission specialists" are with an example of how when they got to wreck, the controls for forward would spin the sub.

and they established, oh yeah, we put on of the thrusters in backwards, so instead of both thrusters firing, and moving the sub forward, they would fire in opposite directions and spin the sub.

after looking into how to re-map the controller, and all sorts of things they figured out that actually with such a configuration of thrusters, you can just turn the controller 90 degrees, so that left is now forward, and old forward is now right, and it works.

seems clever and exciting right? involved! exploration! edge of technically possible right?

wrong.

whats the first you do you when you hook up a motor to a controller ... make sure it spins the right direction.



this example is telling on themselves, its incompetence masquerading as a technical challenge.

there was a suggestion of a rocket example ... its closer to this than challenger:

[stevej37]

I had this one as a kid.

[pmax]

[fisher22]

An OceanGate sub is for sale — and the yacht broker who has spent 5 years trying to sell the vessel now wants nothing to do with it

https://www.insider.com/oceangate-submersible-for-sale-broker-wants-get-rid-of-it-2023-7

[Steve Carlton]

Ran when parked.

[herr_oberst]

We're dealing!

Bring in your trade!

All offers considered!

New carbon-fiber models on the way - we need to clear these out!

[pmax]

[Zeke]

Only 400 to go....

[fanaudical]

Originally Posted by Zeke

Only 400 to go....

399 to go...

[A930Rocket]

Originally Posted by fisher22

An OceanGate sub is for sale — and the yacht broker who has spent 5 years trying to sell the vessel now wants nothing to do with it

https://www.insider.com/oceangate-submersible-for-sale-broker-wants-get-rid-of-it-2023-7

If it hasn’t sold in five years, it’s not about the sell anytime soon.

[pmax]

[Steve Carlton]

Summer Sub Blow Out Sale.

[fanaudical]

Something I realized this morning (very late and maybe discussed already): I don't remember seeing anything about non-destructive examination of the mini sub during construction. Did I miss that? Or did they just not do it?

[David]

Originally Posted by fanaudical

Something I realized this morning (very late and maybe discussed already): I don't remember seeing anything about non-destructive examination of the mini sub during construction. Did I miss that? Or did they just not do it?

It sounds like they had some sort of acoustic emission monitoring system on the carbon fiber hull but with everything else on the sub being substandard, I expect their system wasn't calibrated properly and/or wasn't tracking history.

[HobieMarty]

Someone should do a PSA meme with a picture of the Titan with a caption stating, "Say No To Crack"!!!!


Sent from my SM-N950U using Tapatalk

[pmax]

[unclebilly]

Originally Posted by fanaudical

Something I realized this morning (very late and maybe discussed already): I don't remember seeing anything about non-destructive examination of the mini sub during construction. Did I miss that? Or did they just not do it?

This was the part of the issue with David Lockridge, the guy they fired after he raised safety concerns. He wanted to do NDT but apparently Stockton Rush would have none of it claiming that no NDT equipment would work on 5” thick carbon fibre…

[stomachmonkey]

Originally Posted by David

It sounds like they had some sort of acoustic emission monitoring system on the carbon fiber hull but with everything else on the sub being substandard, I expect their system wasn't calibrated properly and/or wasn't tracking history.

I got the impression that it was done mostly "by feel"

With every dive cycle it made less noise and they convinced themselves once it was not making any more noise it was "broken in" and since it didn't implode it was safe.

[unclebilly]

Originally Posted by stomachmonkey

I got the impression that it was done mostly "by feel"

With every dive cycle it made less noise and they convinced themselves once it was not making any more noise it was "broken in" and since it didn't implode it was safe.

I think that they convinced themselves it was safe because they said so… a lot. The more times they said it, the safer it became.

[David]

Originally Posted by stomachmonkey

I got the impression that it was done mostly "by feel"

With every dive cycle it made less noise and they convinced themselves once it was not making any more noise it was "broken in" and since it didn't implode it was safe.

It's my understanding that they did in fact have acoustic emission monitoring. We use it on high energy piping at work. If it's not calibrated correctly and if you don't record, track and analyze the data it's pointless or worse, gives you a false sense of security.