Baltimore bridge hit by ship, collapsed

[flashback]

If the engine is directly coupled to the prop shaft that might be why they were coming in too fast, when they tried to slow down it stalled. Just a guess on my part but I think something went wrong with fuel delivery, may explain the black smoke as well. FWIW.

 

[racerone]

I do not believe it is easy to put one of these monster engines in reverse.---They might have been able to get reverse and then applied full power hence the smoke.----The " footers " on the great lakes often have 4 engines coupled to 2 propshafts.-------I see them often , live on the Sarnia bridge camera.

 

[alldodge]

We all be guessing
Looks like most use twin 8 cylinder 2-stroke diesels and must stop the engine, shift the cam and restart. There are some container ships that use just one 14 cylinder 2-stroke, so the smoke could very well be motor going full reverse but we will find out in time

https://wolfstreet.com/2018/05/28/t...orld-and-challenges-their-manufacturers-face/

 

[tpenfield]

This incident will probably change bridge design in the years to come.

 

[alldodge]

This incident will probably change bridge design in the years to come.

And as it should. Time changes everything

 

[racerone]

Most traffic lights are installed after a major accident.-----Incidents like this usually spark a major rethink.

 

[dingbat]

Dali is propelled by a single low-speed two-stroke crosshead diesel engine coupled to a fixed-pitch propeller.

Her main engine, a 9-cylinder MAN-B&W 9S90ME-C9.2 unit manufactured by Hyundai Heavy Industries under license, is rated 41,480 kW (55,630 hp) at 82.5 rpm. Her service speed is 22 knots (41 km/h; 25 mph).

For maneuvering in ports, Dali has a single 3,000 kW (4,000 hp) bow thruster.

Electricity is generated onboard by two 3,840 kW (5,150 hp) and two 4,400 kW (5,900 hp) auxiliary diesel generators.

 

[FLATHEAD]

This incident will probably change bridge design in the years to come.

The truss bridges in the port area of the Delaware River have safety features in place to stop such an incident. Some are huge concrete piers and cylinders around the bridge piers and others have rock islands around the bridge piers so that a ship would run aground before it gets to the bridge structure.

 

[airshot]

When a major support is taken out, design won't change anything, it will collapse. Bridges cannot be built rigid, they need to move and sway or they will self destruct. Best scenario is a wall, rock pile or other protective device to protect the support. But in reality, how does anyone stop a million tons moving at 8 mph ??

 

[FLATHEAD]

When a major support is taken out, design won't change anything, it will collapse. Bridges cannot be built rigid, they need to move and sway or they will self destruct. Best scenario is a wall, rock pile or other protective device to protect the support. But in reality, how does anyone stop a million tons moving at 8 mph ??

Design will certainly change things if that design change is adding protective barriers around the piers. It’s all part of it.

 

[racerone]

100,000 tons.

 

[dingbat]

Update 10 Multimedia Release: Salvage operations continue at site of Key Bridge incident

Saturday, April 6, 2024 BALTIMORE – The Unified Command continued salvage operations at the Key Bridge incident. Progress included the removal of a 156-ton piece of Span 19 outside of the navigational channel, which was hoisted and loaded onto a barge for future disposal. Traffic through the...

www.keybridgeresponse2024.com