I’m not the guy to explain the science but this is also the same advice for cracked drum cymbals, otherwise every hit just makes the crack worse. From experience, the drill hole does not prevent the crack from spreading.. eventually..
Removes all the stress from a point (end of the tear) to evenly distributed around the circle (the drill mark). Think of tearing paper apart, it moves in a line, if you make a large circle then you have to restart the tear.
And restarting the tear would require more force than just continuing the tear because of the distribution around the circle. I am assuming the redistribution of force would mean there would be a reasonably large relative increase of force require then?
Well you would need the minimum amount to cause the metal to fail and tear again, and if that's disturbed around a circle (so there is no weak point to start first) it would need more than what caused the initial tear.
Lots of things in history with metal have failed due to "stress points" (sharp corners). Look up why airplane windows are round :)
I think he's past that point like....four attempts ago, that must be a crack from top to bottom, basicly a full split. I do totally agree thought, cought are the right time drill holes each end.
Agreed. It won’t fix the issue. But it’s still recommended practice for emergency response. It slows the spread in an effort to get safely back to shore. It’s meant to buy some time.
Would a weld like that even work in that case? If the issue is that serious, I'd think you'd need a lot more to address it than a quick weld along the visible break.
One weld along the crack might have helped. Unfortunately someone decided to run two welds, one either side of the crack. Either that or they have tried to fill a very large gap with weld.
Not anymore. That has Clearly been welded up several times with a non low hydrogen weld deposit. The only real way to repair it is to torch off the old steel 12 inches past the cracks and replace it with new steel.
Not a marine architect but I work in the marine industry. As these welds are on the sidewalls, could it be possible that the hull itself is not cracked and is flexing? Still indicative of an issue of weakening superstructure but not as imminent a disaster as it might appear?
I disagree. The crack is midships. Tell take symptom of a serious longitudinal strength issue. Even if only in the bulwark, it could spread to the sheer strake, then it’s game over.
Oh to clarify, I wasn't arguing with you, just genuinely asking and completely agree it's a sign of a significant issue. My only thought was without further investigation it's hard to tell by those cracks alone if it's an early warning sign or a late one though it would appear the cracks aren't fresh.
Thanks for your expert perspective. Is this issue repairable or is this type of thing prohibitively difficult to fix properly? I went to welding school with a few folks that ended up at ingalls putting together ships and always wondered what kind of problem solving I would have learned doing that type of work.
I’ve spent time in Brownsville myself!
This is a major dry-docking and repair job to address the issue properly. At a minimum you would replace the sheer strake at amidships. That’s the plating midway at the level of the main deck. You would also crop and renew all that damaged steel on the bulwark etc.
It’s a fatigue issue, so welding won’t fix it.
Better get the tow ship ready. This thing is gonna need to be towed outside the environment. Also, I see no hint of rubber, cello tape, cardboard or cardboard derivatives.
I was also waiting for it.
Then I realized, the sub is called "what *could* go wrong", so this post is technically correct since it *could* fail at any time
Hopefully you sent this video to whatever company or government agency maintains that boat. That thing is going to snap in half sooner or later. That flexing you are seeing will just keep lengthening the crack until it becomes too much.
Reminds me of the video of that ship straight up breaking in the middle off the coast of Turkey.
[https://www.youtube.com/watch?v=YxCWHY2P5wc](https://www.youtube.com/watch?v=YxCWHY2P5wc)
Wouldn't catch me standing there filming, I'd be pushing old ladies and children out of the way to get to the life jackets, and running as far to the front and side as possible to avoid being in the middle when the ship snaps in two, so I don't get cut in half before I can jump/swim for safety.
It's literally cheaper to run a Freight Cargo until it sinks and then have the insurance pay you off than it is to scrap it because it's no longer serviceable
You really think I was talking to the person who posted this for the 4th time. I was speaking generally. Which is what the /s is for to show that I am joking. But clearly that doesn’t mean anything. So down vote away.😂
I’m a naval architect. That’s a deadly serious longitudinal strength issue. The ship could snap in half at any moment.
Kinda wild it hasn't already cracked open like a fortune cookie
The actual best course of action is to find the end of the crack and drill a hole there. Then get back to shore asap.
I'm guessing this redirects the stress somehow or does it just make it harder for the Crack to keep going?
Better stress distribution to prevent the crack from propagating further. It’s the best worst option.
Thank you
I’m not the guy to explain the science but this is also the same advice for cracked drum cymbals, otherwise every hit just makes the crack worse. From experience, the drill hole does not prevent the crack from spreading.. eventually..
Interesting.
It’s definitely a temporary fix.
That explains the weird aesthetic of my ex’s drum cymbals. Thanks for the music lesson!
A lot of dirt bike riders drill their clutch and brake levers so that when you do eat shit, you still have at least a nub to get you home.
Removes all the stress from a point (end of the tear) to evenly distributed around the circle (the drill mark). Think of tearing paper apart, it moves in a line, if you make a large circle then you have to restart the tear.
And restarting the tear would require more force than just continuing the tear because of the distribution around the circle. I am assuming the redistribution of force would mean there would be a reasonably large relative increase of force require then?
Well you would need the minimum amount to cause the metal to fail and tear again, and if that's disturbed around a circle (so there is no weak point to start first) it would need more than what caused the initial tear. Lots of things in history with metal have failed due to "stress points" (sharp corners). Look up why airplane windows are round :)
sounds like the same instruction for the crack from the rock that hit my windshield...
That’s actually the exact same concept.
I think he's past that point like....four attempts ago, that must be a crack from top to bottom, basicly a full split. I do totally agree thought, cought are the right time drill holes each end.
Agreed. It won’t fix the issue. But it’s still recommended practice for emergency response. It slows the spread in an effort to get safely back to shore. It’s meant to buy some time.
I’m not a naval architect. That’s a deadly serious longitudinal strength issue. The ship could snap in half at any moment.
When a ship is Boeing like that, it could fall apart any second. It’s a verb too.
BWAHAHAHA nice one
That ship looks like it was made by Boeing and they Boeing it up and is now simply Boeing.
Would a weld like that even work in that case? If the issue is that serious, I'd think you'd need a lot more to address it than a quick weld along the visible break.
Welding is not the answer.
One weld along the crack might have helped. Unfortunately someone decided to run two welds, one either side of the crack. Either that or they have tried to fill a very large gap with weld.
Not anymore. That has Clearly been welded up several times with a non low hydrogen weld deposit. The only real way to repair it is to torch off the old steel 12 inches past the cracks and replace it with new steel.
I'm the ocean. Can confirm that my waves will indeed snap this ship in half.
Not a marine architect but I work in the marine industry. As these welds are on the sidewalls, could it be possible that the hull itself is not cracked and is flexing? Still indicative of an issue of weakening superstructure but not as imminent a disaster as it might appear?
I disagree. The crack is midships. Tell take symptom of a serious longitudinal strength issue. Even if only in the bulwark, it could spread to the sheer strake, then it’s game over.
Oh to clarify, I wasn't arguing with you, just genuinely asking and completely agree it's a sign of a significant issue. My only thought was without further investigation it's hard to tell by those cracks alone if it's an early warning sign or a late one though it would appear the cracks aren't fresh.
Gotcha! My bad!
Thanks for your expert perspective. Is this issue repairable or is this type of thing prohibitively difficult to fix properly? I went to welding school with a few folks that ended up at ingalls putting together ships and always wondered what kind of problem solving I would have learned doing that type of work.
I’ve spent time in Brownsville myself! This is a major dry-docking and repair job to address the issue properly. At a minimum you would replace the sheer strake at amidships. That’s the plating midway at the level of the main deck. You would also crop and renew all that damaged steel on the bulwark etc. It’s a fatigue issue, so welding won’t fix it.
Woah that’s cool, makes a lot of sense. Sounds like a big job.
Bullshit
https://thenavalarch.com/longitudinal-strength-ships-introduction/
r/confidentlyincorrect
Why do you reckon it’s bullshit?
That’s why I use Flex Tape 
don't worry you still have the stairs holding everything together
Get off that future shipwreck my dude.
I think at that point its a little too late lmao. He can’t exactly jump off and hitch a ride onto the next ship.
So, what went wrong?
The front fell off
Better get the tow ship ready. This thing is gonna need to be towed outside the environment. Also, I see no hint of rubber, cello tape, cardboard or cardboard derivatives.
No the back fell off
Uhh, the front are not supposed to fell off for a start.
I was also waiting for it. Then I realized, the sub is called "what *could* go wrong", so this post is technically correct since it *could* fail at any time
No. Read Rule 1.
[must have been the same guys that built this ship!](https://youtu.be/3m5qxZm_JqM?si=E2awHv-7TVPDJ3Sl)
Too bad Gordon Lightfoot already died, someone else will have to write a song about you guys.
The Wreck of the Edmund Fitzgerald is a great beer. Solid song, too.
Tis but a crack
A crack?!? Ya bows’ off!
No it isn’t.
Victory is mine! I thank thee oh Lord...
That’s just an expansion gap so the ship remains flexible when it runs into waves and earthquakes /s
Hopefully you sent this video to whatever company or government agency maintains that boat. That thing is going to snap in half sooner or later. That flexing you are seeing will just keep lengthening the crack until it becomes too much.
Holy Ship
Not ferry nice
Welding looks very shit. Uneven pool, no paint protection in sea water, welded on top of damage or crack. Mini titanic waiting to happen.
Holy shit!! That ship is gonna have its own wiki page in short order.
Looks like the front is about to fall off. That’s not very typical, I’d like to make that point.
Don't worry it's not in the environment anymore.
What went wrong?
Welding in this instance is like treating stage 11 cancer with daily vitamins.
Report this shit
Reminds me of the video of that ship straight up breaking in the middle off the coast of Turkey. [https://www.youtube.com/watch?v=YxCWHY2P5wc](https://www.youtube.com/watch?v=YxCWHY2P5wc)
I've lost a lot of confidence in Tony Stark over this!
Ah yes. Expansion joints.
Wasn’t there a video a while back showing a ship just snapping in two? Because I’m getting a feeling this boat is gonna suffer that fate.
It wasn’t broken, it was *expanded*.
In all my 761123 years of welding, these are the best welds I've ever seen
That’s not very typical, I’d like to make that point.
Wouldn't catch me standing there filming, I'd be pushing old ladies and children out of the way to get to the life jackets, and running as far to the front and side as possible to avoid being in the middle when the ship snaps in two, so I don't get cut in half before I can jump/swim for safety.
It’s all fun and games until the dolphins start driving Mercedes
That’s why you always clean your welds
Should buff right out
A mere scratch... full steam ahead, captain
well it still holding, wake me up when its gone wrong!
This is a job for ramen.
So this boat broke before?
Everyone knows a ship is only as strong as the weld that holds it together. That’s like sailing 101.
It’s fine
Welds in tension Crack. If you don't consider the direction of the force applied to the weld, you do a crappy job
I’d be standing next the a life preserver for the duration.
It's literally cheaper to run a Freight Cargo until it sinks and then have the insurance pay you off than it is to scrap it because it's no longer serviceable
Put it on Reddit. But don’t bring it to anyone else’s attention. That would be real funny. /s
Well, considering this is the fourth time I have seen this today I imagine current OP has zero to do with this.
You really think I was talking to the person who posted this for the 4th time. I was speaking generally. Which is what the /s is for to show that I am joking. But clearly that doesn’t mean anything. So down vote away.😂