Baltimore Bridge Collapse

[eddiememphis]

https://www.cnn.com/us/live-news/baltimore-key-bridge-collapse-03-27-24/index.html

You probably seen it by now. One of those giant container vessels bumped into the Francis Scott Key Bridge in Baltimore Harbor. The bridge went down incredibly quickly. Several people have been killed, some are still missing. President Biden is pledging to rebuild.

With federal money involved, and Baltimore, being what it is, the new bridge will obviously have a new name. Because of course... slavery.

https://www.theroot.com/rebuild-the-francis-scott-key-bridge-in-baltimore-but-1851368486

Any guesses what the new structure will be called?

[ray1970]

Any guesses what the new structure will be called?

Bridgey McBridgeface?

[arbol]

The Joe Biden "huh? what's that?" bridge.

-John

[TRnCO]

The Joe Lieberman bridge?

[Sawin]

There is a fair chance it will be named after a black woman from Baltimore, who was involved in the civil rights movement.

[BushMasterBoy]

I'm sure the bridge was well illuminated for passenger traffic over it. Probably not so well lit up for the vessel traffic below it!

[BladesNBarrels]

I'm sure the bridge was well illuminated for passenger traffic over it. Probably not so well lit up for the vessel traffic below it!

As I gather from the recent reports
2 Pilots aboard.
Power failure causing failure of steerage.
Emergency generator caught fire.
Calls out for assistance with tugs too late for them to arrive
Dropped anchor to slow vessel, but not effective
Mayday with 90 Seconds to close bridge and the police reacted immediately saving multiple vehicles
NTSB investigation and recommendations should be interesting

[BushMasterBoy]

Most likely navigating in the dark. I have three emergency generators just for my little house on the praire.

[TRnCO]

Once ya lose power to that many tons, well it kinda like a train, it don't stop on a dime, let alone turn on a nickel. All reports I've seen so far are saying lose if power and the ship was calling out may day distress calls

[eddiememphis]

https://www.nytimes.com/interactive/2024/03/28/upshot/baltimore-bridge-ship-force.html

"And our higher-end estimates, reviewed by several civil engineering experts, suggest it is realistic to put the force of the impact with the pier at upward of 100 million newtons."

EXAMPLE APPROXIMATE FORCE(IN NEWTONS)
Fully loaded 18-wheeler colliding with a bridge at 80 m.p.h. 1 million
Force required to slow the fully loaded Dali over 38 seconds 12 million
Saturn V rocket thrust at launch 35 million

“Depending on the size of the container ship, the bridge doesn't have any chance,” said Nii Attoh-Okine, a professor of engineering at the University of Maryland."

The new George Floyd Memorial Bridge will be built to modern standards, with stronger piers or protection systems around the piers that can either absorb or deflect the force of ship collisions.

[Clint45]

Some are speculating the navigation system may have been remotely hacked for a "Black Swan" event... but this was not this vessel's first accident... apparently last year they collided with a dock. They obviously experienced some sort of major electrical issues and engine issues from the video. Seems more like the ship was not properly maintained and the captain was incompetent. No reason to be anywhere near those pillars.

[Delfuego]

Some are speculating the navigation system may have been remotely hacked for a "Black Swan" event... No one in cybersecurity. People that don't understand technology and watch lots of movies, maybe ;)

[Great-Kazoo]

https://www.nytimes.com/interactive/2024/03/28/upshot/baltimore-bridge-ship-force.html

"And our higher-end estimates, reviewed by several civil engineering experts, suggest it is realistic to put the force of the impact with the pier at upward of 100 million newtons."

EXAMPLE APPROXIMATE FORCE(IN NEWTONS)
Fully loaded 18-wheeler colliding with a bridge at 80 m.p.h. 1 million
Force required to slow the fully loaded Dali over 38 seconds 12 million
Saturn V rocket thrust at launch 35 million

“Depending on the size of the container ship, the bridge doesn't have any chance,” said Nii Attoh-Okine, a professor of engineering at the University of Maryland."

The new George Floyd Memorial Bridge will be built to modern standards, with stronger piers or protection systems around the piers that can either absorb or deflect the force of ship collisions.


Even @ 5 KPH, that momentum along with mass, nothing is going to stop that movement. For the naysayers, i've suggested they roll through an empty parking lot @ 35-50 mph, then lock up their brakes. They'd be surprised, on dry pavement how far they travel.

That ship wasn't stopping. OR turning away (even with a working rudder) even given 2-3x the distance they were at.

[BushMasterBoy]

Kazoo is correct with his Newtonian physics!

[BPTactical]

One thing many people fail to understand- propeller driven watercraft regardless of size don’t “steer” as you think of it- the bow doesn’t move into the intended direction of a turn like a car or similar. The stern “skids” to the outside of the intended direction because of water flowing over the rudder surface and that initiates the turn.
Without thrust over the rudder surface there is no steering.
When it lost power it was a slow traveling multi million ton battering ram.

[eddiememphis]

One thing many people fail to understand- propeller driven watercraft regardless of size don’t “steer” as you think of it- the bow doesn’t move into the intended direction of a turn like a car or similar. The stern “skids” to the outside of the intended direction because of water flowing over the rudder surface and that initiates the turn.
Without thrust over the rudder surface there is no steering.
When it lost power it was a slow traveling multi million ton battering ram.

Most ships that size have bow thrusters.

[Wulf202]

Thrusters don't work when the power is off. They're electric motors

[eddiememphis]

Not all thruster are electric.

I was correcting the statement that ships solely rely on rudders.

Obviously with a loss of power nothing will work.

[BPTactical]

With a vessel that size the only time thrusters are going to do anything is putting it to berth at .001 KPH.

[BushMasterBoy]

Bow thruster is 4000 HP. Correct action is to drop anchors immediately. Even that may not have the desired effect in shallow water. Largest ship I have worked on is the USNS Range Sentinel.

https://en.wikipedia.org/wiki/MV_Dali

[Clint45]

Even @ 5 KPH, that momentum along with mass, nothing is going to stop that movement. For the naysayers, i've suggested they roll through an empty parking lot @ 35-50 mph, then lock up their brakes. They'd be surprised, on dry pavement how far they travel.

That ship wasn't stopping. OR turning away (even with a working rudder) even given 2-3x the distance they were at.

In a tractor trailer loaded with 80,000# of cargo, far more stopping distance is required.

There were hundreds of CONEX containers on that boat... each of which weighs 5,000# EMPTY... and stopping in water is far more difficult than stopping on a highway where there is friction between rubber and asphalt, even if they dropped anchor.

[eddiememphis]

https://thefederalist.com/2024/04/01/leftists-waste-no-time-in-attacking-legacy-of-francis-scott-key-after-baltimore-bridge-collapse/

Interesting article in the federalist, refuting claims that Francis Scott key was a racist slave owner.

Not that is will matter to the race hustlers actively rewriting history.

Key was well known as an active anti-slavery proponent. For over 40 years, he regularly represented enslaved African Americans in court pro bono, successfully winning freedom for hundreds of men, women, and children.

At the end of his life, Key himself explained, "No northern man began the world with more enthusiasm against slavery than I did." He added, "For forty years and upwards... I have always been endeavoring to aid in promoting [abolition], and do so still."

It is true that Key owned slaves, inheriting them from his father. But it is also true that he freed virtually all of them and personally ensured they received the necessary training and education to succeed in freedom.

For example, in one instance, Key traveled to Pennsylvania to emancipate his farm manager and then hired him as a freeman to continue working for him.

[Aloha_Shooter]

Even @ 5 KPH, that momentum along with mass, nothing is going to stop that movement.


Kazoo is correct with his Newtonian physics!

Slight correction. In Newtonian physics, momentum includes mass. p = mv where p is momentum, m is mass, v is velocity.

[BushMasterBoy]

In Einsteinian physics the ship would be nuclear powered. In the real world I am powered by coffee. This disaster could have been prevented by the use of octonions and artificial intelligence computing. For our first lesson...


https://www.youtube.com/watch?v=3AAK-4KdGXs

[rondog]

"The new George Floyd Memorial Bridge"

Dear God, tell me this is an April Fools joke.....

[ray1970]

"The new George Floyd Memorial Bridge"

Dear God, tell me this is an April Fools joke.....

Probably just as serious as the reintroduction of wooly mammoths to the western slope of Colorado.

[eddiememphis]

Famous people from Baltimore include Nancy Pelosi, Thurgood Marshall and my nominee Muggsy Bogues.

[BPTactical]

In Einsteinian physics the ship would be nuclear powered. In the real world I am powered by coffee. This disaster could have been prevented by the use of octonions and artificial intelligence computing. For our first lesson...


https://www.youtube.com/watch?v=3AAK-4KdGXs


She probably smells like cat piss