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-   -   Tourist mini sub missing off titanic (http://forums.pelicanparts.com/off-topic-discussions/1141939-tourist-mini-sub-missing-off-titanic.html)

pmax 07-10-2023 03:43 PM

Quote:

Originally Posted by cockerpunk (Post 12041437)
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:

https://static.timesofisrael.com/www...66-640x400.jpg

http://forums.pelicanparts.com/uploa...1689032596.jpg

stevej37 07-10-2023 03:56 PM

I had this one as a kid.

https://i.pinimg.com/564x/3e/ff/15/3...447416bb97.jpg

pmax 07-10-2023 05:46 PM

http://forums.pelicanparts.com/uploa...1689039724.jpg
http://forums.pelicanparts.com/uploa...1689039922.jpg

fisher22 07-11-2023 07:06 AM

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 07-11-2023 10:49 AM

Ran when parked.

herr_oberst 07-11-2023 11:10 AM

We're dealing!

Bring in your trade!

All offers considered!

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

pmax 07-11-2023 01:18 PM

http://forums.pelicanparts.com/uploa...1689110267.jpg

Zeke 07-11-2023 02:11 PM

Only 400 to go....

fanaudical 07-11-2023 06:15 PM

Quote:

Originally Posted by Zeke (Post 12042206)
Only 400 to go....

399 to go...

A930Rocket 07-11-2023 06:56 PM

Quote:

Originally Posted by fisher22 (Post 12041873)
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 07-11-2023 07:17 PM

http://forums.pelicanparts.com/uploa...1689131821.jpg

Steve Carlton 07-11-2023 10:34 PM

Summer Sub Blow Out Sale.

fanaudical 07-12-2023 05:47 AM

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 07-12-2023 07:07 AM

Quote:

Originally Posted by fanaudical (Post 12042587)
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 07-12-2023 10:21 AM

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 07-12-2023 10:37 AM

http://forums.pelicanparts.com/uploa...1689187019.jpg

unclebilly 07-12-2023 07:29 PM

Quote:

Originally Posted by fanaudical (Post 12042587)
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 07-12-2023 07:55 PM

Quote:

Originally Posted by David (Post 12042641)
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 07-12-2023 08:15 PM

Quote:

Originally Posted by stomachmonkey (Post 12043225)
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 07-13-2023 09:33 AM

Quote:

Originally Posted by stomachmonkey (Post 12043225)
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.

pmax 07-13-2023 01:26 PM

http://forums.pelicanparts.com/uploa...1689283559.jpg

pmax 07-16-2023 09:27 AM

http://forums.pelicanparts.com/uploa...1689528432.jpg

flatbutt 07-16-2023 10:36 AM

Quote:

Originally Posted by Steve Carlton (Post 12042492)
Summer Sub Blow Out Sale.

We crush the competition....oh...wait

Robert Coats 07-16-2023 01:51 PM

Too soon?

https://i.imgur.com/NwoKH8T.jpg

varmint 07-16-2023 02:09 PM

i haven't been paying attention. was the a black box on the sub that could be recovered? seems that would answer most of these questions.

fisher22 07-16-2023 02:23 PM

I was going to provide info I’ve read online, but everything I’ve read so far about a black box seems to be that the world is still wondering if Titan had one. Based on everything else that was lacking (testing, solid comms, permits) they should just come out and admit they didn’t have a black box. Absolute Mickey Mouse show.

masraum 07-16-2023 02:31 PM

Quote:

Originally Posted by pmax (Post 12043726)

“I did a fair amount of due diligence, calling up people who had already been on OceanGate Expeditions, who are not part of the company, and asking them about their experiences.”

:eek: LOL! It sounds like he did his "due negligence" or maybe "due ignorance."

This reminds me of the story of Abraham Wald, the mathemetician from WWII and the shot-up military aircraft and survivorship bias.

berettafan 07-16-2023 04:03 PM

sounds like 'i never met anyone that was killed by smoking'

LEAKYSEALS951 07-16-2023 04:08 PM

It sunk. Crushed! For go$% sake, don't let this thread get to 1000! :)

<iframe width="560" height="315" src="https://www.youtube.com/embed/ADrlhpPpF1Q?start=27" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

Noah930 07-16-2023 04:20 PM

Quote:

Originally Posted by masraum (Post 12045700)
“I did a fair amount of due diligence, calling up people who had already been on OceanGate Expeditions, who are not part of the company, and asking them about their experiences.”

:eek: LOL! It sounds like he did his "due negligence" or maybe "due ignorance."

Yeah, I got a chuckle out of that statement, too. Let me ask a bunch of customers who don't really have knowledge on building super deep sea submursibles about the safety of this experimental super deep sea submersible.

Bill Douglas 07-16-2023 04:25 PM

Quote:

Originally Posted by masraum (Post 12045700)
and asking them about their experiences.”

Him "Hi, it's me, did you have a good time?"

Them "Yes, had a lovely time, and the lunch afterwards was excellent."

masraum 07-16-2023 04:46 PM

Quote:

Originally Posted by Noah930 (Post 12045783)
Yeah, I got a chuckle out of that statement, too. Let me ask a bunch of customers who don't really have knowledge on building super deep sea submursibles about the safety of this experimental super deep sea submersible.

Those are certainly the best folks to ask.
Quote:

Originally Posted by Bill Douglas (Post 12045786)
Him "Hi, it's me, did you have a good time?"

Them "Yes, had a lovely time, and the lunch afterwards was excellent."

...
"oh, by the way. Was there a catastrophic failure of the sub on your trip or did you make it back ok?"

I'm thinking he didn't call enough people or maybe he should have waited until after this most recent trip and called those folks.

pmax 07-16-2023 04:50 PM

Quote:

Originally Posted by cockerpunk (Post 12041154)
they werent pushing any boundaries though.

its it well known and understood how to build submarines to visit the titanic. just because stockton rush didnt do it the right way, doesnt mean he was pushing boundaries.


if stockton rush wanted to push actual boundaries, he could have invented new ways to inspect carbon fiber structures to measure their strength. he could have invented new modeling techniques to understand and mathematically model the effects on composite materials. he could have had the sub properly tested and classed, and convinced the world that he was right.

he didnt.

he was a cheap moron selling 'innovation' to moron billionaires

and for people who were paying attention, he told on himself constantly. even oceangates marketing materials openly proclaim stuff that is telling on yourself.

http://forums.pelicanparts.com/uploa...1689555013.jpg

tdw28210 07-17-2023 05:33 AM

So there must be leftover Oceangate sub and support boat that are on the dry in Beaufort, North Carolina. Or someone is posting old pics and passing them off as new. Or??????

http://forums.pelicanparts.com/uploa...1689600135.jpg

fisher22 07-17-2023 05:55 AM

^^^
I would think OceanGate wouldn’t really want another specimen available for inspection. If the photo is current and another sub exists, their problems just got worse.

pavulon 07-17-2023 06:18 AM

Quote:

Originally Posted by varmint (Post 12045689)
i haven't been paying attention. was the a black box on the sub that could be recovered? seems that would answer most of these questions.

Still connected to the sub controller and all high scores remain intact.

http://forums.pelicanparts.com/uploa...1689603511.jpg

masraum 07-17-2023 06:22 AM

Quote:

Originally Posted by pavulon (Post 12046021)
Still connected to the sub controller and all high scores remain intact.

http://forums.pelicanparts.com/uploa...1689603511.jpg

ROFLMAO!

Nice.

fisher22 07-17-2023 08:17 AM

^^^
We've been commenting on how ridiculous using the game controller is, but I honestly have more faith in a robust design in the hands of millions of users worldwide than OceanGate.

cockerpunk 07-17-2023 09:40 AM

Quote:

Originally Posted by fisher22 (Post 12046145)
^^^
We've been commenting on how ridiculous using the game controller is, but I honestly have more faith in a robust design in the hands of millions of users worldwide than OceanGate.

the game control is not even a real flaw in the design. the military and plenty of other organizations use them to control subs, drones, etc, and for good reason. they are designed with speed, comfort and reliability in mind, and well tested. plus most users are pretty familiar with them these days, so you save on training too.

there is nothing really funny about the game controller thing. all the insanity in the titan was the other ... stuff

Seahawk 07-17-2023 09:47 AM

Quote:

Originally Posted by cockerpunk (Post 12046219)
there is nothing really funny about the game controller thing. all the insanity in the titan was the other ... stuff

I agree.

In the drone world game controllers are the standard for many, many reasons. I tried almost 20 years ago to make game controllers the standard for Navy UAS.

Once you get crushed by your eight year old playing a "game" (all drones are essentially first person shooter games) it begins to make sense.

We also did a lot of work with NATO on standardizing ground control station interfaces to enable game controllers.

Kids know and they don't look at the controller.


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