chitoryu12 posted:

Enjoy this story from 1997 about a lost cotter pin leading to a helicopter narrowly being saved by a man with Leatherman tool standing on the skid!

SpaceCadetBob posted:

The fact that they got back on that helicopter after all that is mind boggling. Id never ride a helicopter again.

quote:

At least 15 people died when a dam collapsed at a gold mine in Russia’s Krasnoyarsk region
...
The dam wasn’t registered with the Environmental, Industrial and Nuclear Supervision Service and was illegal

Cojawfee posted:

If that's the same type of chuck wagon they use for racing at rodeos, I guess they are meant to be driven on loose dirt rather than grass.

CannonFodder posted:

That's a great demonstration of potential energy stored in metal. What's the more scientific term? Spring tension?

Descar posted:

https://i.imgur.com/kaxQAuy.mp4

Memento posted:

All

My

Friends

Know the Low Rider

EvenWorseOpinions posted:

I found a bird inside of a belt guard today, both legs tragically amputated, very dead. Bird failed to follow several extremely important safety practices.
Bird defeated a belt guard designed to prevent contact with moving parts by intentionally entering through a small opening on the backside of the guard.
Bird did not use lock out tag out before beginning work in a moving part area.
Bird did not inform anyone that he was intending to begin work on the equipment.
Bird was not wearing any PPE.
Every step of this tragedy represents a major non-adherence to company safety policies. We will never know why bird chose to take these risks upon himself, but it is a reminder that complacency kills.

chitoryu12 posted:

Enjoy this story from 1997 about a lost cotter pin leading to a helicopter narrowly being saved by a man with Leatherman tool standing on the skid!

Descar posted:

https://i.imgur.com/kaxQAuy.mp4

Cojawfee posted:

Someone please do the math on how high that car would jump if you could instantly delete all that poo poo on the roof.

Icon Of Sin posted:

Sweet Christ I never want to work in negative-stupid temps ever again. I was in the army in Fairbanks, and training wasn’t suspended until it was -50F.

Ranges where you leave your weapon outside, because if you bring it in the metal is cold enough to condense whatever little humidity is left in the air and become a rusty mess? Check.

Your face cover falls just slightly, and you don’t notice until you go to shoot and you’ve suddenly got a frostbite streak across your cheek? Check.

Can’t turn off your vehicles because odds are good that the batteries, oil, or engine block will freeze? Check.

You hit a cold snap, and the air in your tires contracted to the point that your tires are both flat and frozen into a flattened shape, and have to be driven to break them back into being round? Check.

The difference between summer and winter temps isn’t so bad in a lot of places (maybe 30-40F where I live), and you should still keep an eye on your tires when the season changes. The cold snaps in Fairbanks could go down to -70F, while the baseline temp was somewhere around -20 (with heatwaves to above zero, sometimes). Add in the tire going “flat” because the air inside was too cold and contracted, then the tire freezes in that flat shape...

God I hope I never have to go back to that loving state.

e: it was so cold that road salt was no longer an option. In Fairbanks they used actual gravel instead, with predictable results for everyone’s windshields

Descar posted:

https://i.imgur.com/kaxQAuy.mp4

Humbug Scoolbus posted:

Northern Warfare School was something else. I did the Advanced Arctic Diving course to go along with it. Now that redefined cold to me.

Icon Of Sin posted:

While we’re on the subject of diving and OSHA, we had a guy have a rebreather failure earlier this year on a work dive. The rebreather he was using had 3 O2 sensors in the loop, with the design thought of “1 fails, other 2 override the bad one”. Our intrepid diver had 2 sensors fail, so they overrode the one good sensor and his rebreather ended up giving him pure O2 at 100ft down.

Icon Of Sin posted:

gently caress. That. I broke my wrist at the cold weather leader’s course trying to learn to ski, and never went back.

I know a guy who teaches ice diving, technical diving, and rebreather diving who travels to the Great Lakes to do these things. He tells me stories about how often his students would’ve killed themselves had they actually been at depth and unsupervised while practicing various skills in the shallows, and I lose the remote interest that I had prior.

While we’re on the subject of diving and OSHA, we had a guy have a rebreather failure earlier this year on a work dive. The rebreather he was using had 3 O2 sensors in the loop, with the design thought of “1 fails, other 2 override the bad one”. Our intrepid diver had 2 sensors fail, so they overrode the one good sensor and his rebreather ended up giving him pure O2 at 100ft down.

The normal O2 exposure limit is calculated by multiplying the percent of O2 in your breathing gas (expressed as a decimal) with your absolute depth (measured in atmospheres). At sea level, your O2 exposure is .209 (20.9% O2 x 1 atmosphere). For reasons that aren’t totally understood yet (Diver’s Alert Network is actively researching this), exposure behind a level of 1.4 puts you into an O2 seizure sooner rather than later. Doing the math, you can’t breathe pure O2 deeper than about 15ft without expecting to have an O2 seizure. Doing the math on our poor diver (1atmo at sea level, +3 more for being at 100ft) breathing pure O2 at that depth put the man at at least 4.0 for his O2 exposure, where he immediately had a seizure. Thankfully he clamped down on his regulator instead of spitting it out and drowning, but his buddy now had the task of getting him back to the surface as quickly as could be done safely. Buddy ascended him to ~70ft before losing control of him due to buoyancy in his BCD, and he shot straight back to the surface; the kicker was that since he was breathing pure O2 at extreme depth, he had effectively zero decompression-related injuries due to the lack of nitrogen buildup in his body.

Dude is possibly the luckiest man to have ever survived a rebreather accident.

MisterOblivious posted:

DIY Rebreather
https://aylo6061.com/2019/10/14/oxygen-rebreather-design-and-fabrication/

Descar posted:

https://i.imgur.com/kaxQAuy.mp4

Humphreys posted:

gender illusionist posted:

What on earth was he trying to do? I imagine that broke some important parts of his house

packetmantis posted:

You expect me to pour a bunch of gas into a hole and not set it on fire?

Humphreys posted:

I used to do it all the time as a kid on the farm. It was worse when it did explode due to using anfo or other stuff I stole that was used for stumping because the ants weren't dead...they were EVERYWHERE

MisterOblivious posted:

DIY Rebreather
https://aylo6061.com/2019/10/14/oxygen-rebreather-design-and-fabrication/

MisterOblivious posted:

DIY Rebreather
https://aylo6061.com/2019/10/14/oxygen-rebreather-design-and-fabrication/

Memento posted:

Someone found the origin story.

*snip*

Icon Of Sin posted:

He’s wearing a very basic dive computer, that can’t compensate for the varying levels of O2 in his system over the dive. Looks like a Suunto Zoop, which only calculates decompression limits for up to 40% O2/60% N2 as your breathing gas. I think manual O2 add-valves were phased out of military rebreathers in the 40’s or 50’s, maybe?

Congrats on ignoring every facet of basic safety in design, in execution, and every technological advancement in the field of scuba diving for the last 70 years. He doesn’t even have a loving bailout tank ffs, for when his death trap inevitably offers him up to the abyss.

Previa_fun posted:

What was that old site where the guy made a webcomic about how much he hated recreational divers and that diving was super serious and only for business purposes? Sea patrol sticks out in my mind but its ungoogleable.

mexican willie posted:

https://forums.somethingawful.com/showthread.php?threadid=3757384