Posted on 06/21/2023 12:02:51 PM PDT by VAFreedom
In a 2019 interview, the Titan's maker lamented "obscenely safe" diving security regulations.
CEO Stockton Rush said he understood the regulations but regretted their effect on innovation.
Rush is understood to be on board the submersible that lost contact with the surface Sunday.
(Excerpt) Read more at news.yahoo.com ...
It likely has attach points for tie down use. Those should suffice.
One thing I just learned is the ballast is automatically dropped after 24 hours, so the sub is supposed to surface, power or not. If floats quite low in the water, so that may be of little help if it is way off course.
Waiting on the new carbon fiber jetliners to shred while in flight...
Pressure is pushing inside out keeping the pressure vessel loads in tension. Everything is pushing out. It’s the opposite under water.
I don’t know the answer. But Rickover and his Sub Safe program sure as hell would. Deep diving subs just have to be perfect... simply perfect.
The walls of that cylinder may have been 5” thick but watching a youtube on the construction the ends looked to have been tapered to fit into the end caps. So maybe it crushed by longitudinal pressure, like standing on an aluminum can. Just the end caps would be left.
like an airplane carries?
From survivable crashes to not from dependable to blazing inferno for electric cars that cost much more then gas cars.
It is them side effects you need to look out for.
How safe are modern aircraft with carbon fiber composite fuselages in a survivable crash?
https://www.reinforcedplastics.com/content/features/how-safe-are-modern-aircraft-with-carbon-fiber-composite-fuselages-in-a-survivable-crash/
The fact that carbon fiber composite fuselages are more brittle than aluminum ones is probably not very relevant in a catastrophic accident like an aircraft at cruising speed flying into the side of a mountain. But it may make an important difference in survivable incidents, like aborted landings, hard landings and field landings.
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The aircraft have to be perfect.
https://theaircurrent.com/aviation-safety/boeing-pulls-eight-787s-from-service-over-structural-issue/
First, while the fin sheared off above the brackets at its base, neither the brackets nor the bolts anchoring them to the plane’s aluminum fuselage appear to have failed. The joint itself survived; the break is in the composite above it.
Engineers said this could mean that fatigue had weakened the polymer above the brackets, but it could also mean that catastrophic stress had simply snapped the fin.
Air Crash Investigators Focus on Carbon Fiber
https://www.washingtonpost.com/archive/politics/2001/11/18/air-crash-investigators-focus-on-carbon-fiber/3ed04392-7e96-4a04-b00f-7fba0533d566/
A rail car implosion shows how quick. Since the Titan is under much higher pressure you can speed up the implosion.
https://thumbs.gfycat.com/AncientSpitefulAmericansaddlebred-max-1mb.gif
very true in regards to failure conditions. Carbon fiber has basically zero yield. When it goes, it goes. Aluminum will yield quite a bit before failure. Another weak point of cf structures is the bonding so structures have to be designed around bond gap strength. BUT... Aluminum has fastener or weld strength... etc. However the benefit of cf structures is virtually zero fatigue. You can flex a piece of cf indefinitely and it will not fatigue fail. Aluminum and metals will. But.. CF has peel failures which metals do not... CF bidirection weave does not ‘tear’ (crack propagation) but metals will. It is all a balance. It is all a balance hence why modern aircraft are a mix of both. For a passenger pressure vessel CF is far superior. In compression 13,000 feet underwater designed by “diverse 16 year olds” not so much.
As for crashes. The FARs I worked with... The human body can hardly tolerate the conditions required for allowable failures of either aluminum or cf aircraft. Smoke is the killer.
I always enjoy good aircraft design conversations. Kinda makes me want to get back in the industry but I abhor the paperwork....
Also... It was so damned infuriating seeing Chomo Joe’s pick to head the FAA didn’t know anything about aircraft.
God help us.
Freegards...
“I say send the bill the the estates of Rush and all of his passengers. I don’t want to have to foot the bill for their stupidity.”
Ditto!
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