Since the story came out people fixated on “lol he used a shitty gaming controller” but really that is one of the least sketchy design choices in the entire rig. Why reinvent the wheel and make a custom set of controls that are realistically another huge expense and potential failure point, when off the shelf solutions exist for that component?
The corners that were cut are the ones involving the viewport/nose adhesion to the ships frame, and the structural integrity of the carbon fiber hull itself. They had test data suggesting it was a bad idea to engage in repeated dives with their design, and an even worse idea to operate at the depths they chose. They decided to ignore that.
That doesn’t explain why they used the wireless version of that Logitech instead of wired to control the thing they were literally inside.
To be fair, they’re under water and sharks have been known to chew through electrical cables
I suspect the wired cabling would be to control components inside the sub, not outside. And I say that only because it’s unlikely that wireless signals would penetrate the sub walls.
using a wireless controller to manage life critical functions is the acme of stupidity.
The game controller is not managing life critical functions, that’s called a computer. The game controller plugs into the computer. The great thing about that is that you can bring a second (or even a third) game controller for redundancy.
It’s just that the engineering choices that caused the failure are difficult to understand or communicate in sentence so the game controller is something any idiot can harp on about and sound smart.
he game controller is not managing life critical functions
oh, it doesn’t control ascent and descent, angle of attack, etc? it’s not used to turn or operate the craft, that’s all ‘done by computer’?
pfft.
bluetooth and other wireless interface protocols aren’t meant for life critical applications. give me a hardwired input - even a game controller - any day when it comes to life or death shit.
Using commercial off the shelf technology without proper testing and certification is absolutely cutting corners. See: Kaprun disaster.
What kind of fire rating did those COTS parts throughout the interior of the vessel have? What kind of redundancy existed? Would you use a Logitech controller for a spacecraft? The requirements of deep sea submersibles and spacecraft are quite similar. Would any of the submersible certification agencies approved this? I think not.
I see the Logitech controller, the carbon fiber hull, and so many other decisions he made as symptoms of the same corner cutting, “move fast and break things” mentality he had.
Using commercial off the shelf technology without proper testing and certification is absolutely cutting corners. See: Kaprun disaster.
I just read the wikipedia article; thanks for mentioning it.
I’m not sure it’s a good example of your point, though. Notably:
the cause was the failure, overheating and ignition of a fan heater in the conductor’s compartments which was not designed for use in a moving vehicle.
The onboard electric power, hydraulic braking systems, and fan heaters intended for domestic use increased the likelihood of fire.
The fan heater is the only off-the-shelf technology listed here, and there’s no suggestion that it was part of the train’s design. It seems likely that a train conductor brought it on board to keep the compartment warm through the workday. Still a bad idea in a train, especially on a 30° slope, but not an example of the designers cutting corners.
Edit:
Thanks to others for linking photos and a report (in German) that show how the heater was installed. It was clearly not a case of a conductor just setting the heater on the floor, but the installation still looks very much out of place. Perhaps corner-cutting was involved, but this doesn’t look like something done by the train designers. Even an expensive industrial heater seems like it would be an extraordinarily bad idea in that location, right up against high-pressure hydraulic oil lines. Does someone have the details behind it? It looks more likely a (very foolish) modification made by someone else, like maybe the train operators.
For anyone else following this, those hydraulic oil lines that the heater was nearly touching were apparently pressurized at 190 bar, which I think is about 2700 pounds per square inch.
It’s an example of uncertified consumer grade equipment used in a commercial environment to disastrous results, outside of its original designed purpose. It’s one of the most well known examples of why you don’t use consumer grade hardware in a commercial/industrial setting.
It was not brought on board by the conductor or someone else, it was permanently installed in the train in place of commercial grade heaters they couldn’t source. It was installed in the wall during assembly.
I’d argue it is an example of cutting corners, they didn’t want to find / pay more for commercial grade heaters. It was not compliant with the original design nor fire safety standards.
It was not a train conductor that brought it with him, it was build into the train by the train manufacturer. See this page: https://155.at/der-heizluefter/
Exactly this. When you procure custom hardware, you’re paying (a lot) for the vendor to ensure that each unit meets the specifications you provide. If you validate off the shelf hardware like this, there is no guarantee that another batch of the same sku will also meet your requirements. Imagine training on these controllers then a certain batch of them has wildly different sensitivity.
Having tried to use those, my main issue was the 710 is an unreliable 2.4ghz wireless, when bluetooth controllers all worked much better for me. I couldn’t get the 710 to have reliable button presses from more than like 4 feet from my pc, so I ended up just using the 310 wired. Maybe there isn’t enough interference on the sub for that to be an issue.
There’s going to be no external interference when you’re under water. Sea water makes an excellent em shield
From what I can tell the lawsuit (which is against Ocean Gate, not Logitech) is really just calling out the controller as another example of willfully negligent behaviour.
You’re certainly correct that the actual cause of the failure was the carbon fibre hull. Just a terrible idea on so many levels. Carbon fibre, by its nature, is good under tension, not compression. It was never going to function well as a pressure vessel underwater.
There were a litany of terrible decisions made by Ocean Gate, such as not tethering the sub, because it was cheaper to launch it from a towed raft, but none of those bad decisions ultimately mattered once that pressure vessel failed. Those people were dead so fast that, to quote Scott Manley, “You go from being biology to being physics.”
You can always bring a second controller for redundancy. I would bet money the game controller had zero impact on the failure and I hate all the shade being thrown on this innocent controller.
Using off the shelve components is not an issue, even NASA does it but they have very precise procedures on how to select them.
Wasnt the carbon fiber body rated for like, 1/3rd the depth that they dove to?
It was very NASA O-Ring vibes. “We did it once, so we can do it every time” at least until they cant anymore, and that cant is usually accompanied by regret and poor innocent people being salsafied.
Carbon fiber wasn’t rated for any depth. It’s shit for compression and you don’t need light materials for a submersible.
No, you’re right… I think it was the winshield bubble that was rated for 1/3rd the depth? I know something was rated for a far shallower depth than what the dumbass CEO made the sub repeatedly go to.
