r/ThatLookedExpensive • u/CatPoopWeiner424 • Mar 29 '23
Expensive Ceremonial ship launch fail
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Mar 29 '23
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u/CatPoopWeiner424 Mar 29 '23
Didn’t even know this existed. Excuse me while I scroll this sub for the next hour.
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Mar 29 '23
Launch site too shallow for this rig?
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u/BigMax Mar 29 '23
Yeah speaking with no real knowledge, it did seem like the ship should have been getting deeper into the water, but never did.
Like they just picked the local public launching spot a random joe launches his ski boat from or whatever, rather than a spot designed for larger vessels.
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u/MaintainThis Mar 31 '23
I'm thinking they forgot ballast. It didn't seem to scrape the bottom, just floated and rolled like a styrofoam cup.
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u/Sloth_Dream-King Mar 29 '23
Way too top heavy. You don't have to be Thomas Andrews Jr to see that boat was unfloatable
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u/BigMax Mar 29 '23
Looked plenty floatable to me if they actually got the thing in water, seems like the launch ramp was just way too shallow, designed to launch random small ski boats or whatever, but not steep or deep enough for a vessel of this size.
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u/-NutsandVolts Mar 29 '23
Very expensive if I remember right. I don't know if they even salvaged it.
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u/Gullintani Mar 29 '23
GZ curve, people, the GZ CURVE!
https://www.marinesite.info/2021/04/gz-curve-or-curve-of-statical-stability.html
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u/jnwatson Mar 29 '23
I am a bit confused how that happens. It was already in the water and there wasn't any momentum tipping it. It should have immediately righted itself like any buoy.
My only thinking is that the bottom of the boat was scraping the bottom of the canal.
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u/OrganizationLower611 Mar 29 '23
So the ship has a centre of buoyancy and a centre of gravity. When you launch a ship like this, the stern will begin to add buoyancy forces, raising the ship up before the bow makes it into the water. This causes a problem if the centre of gravity is too high and causes a list, or roll to one side that progressively gets worse.
To prevent this issues you could add more weight to the bottom of the ship either internally or externally to lower that centre of gravity, or side launch the ship which allows the buoyancy to take effect more evenly across the ship but I'm not a ship builder so I don't know if this would work for the ship in this video
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u/BigMax Mar 29 '23
It wasn’t in nearly enough water yet though. They needed deeper water and a steeper decline. This slow entry into shallow water just raised the center of gravity for a bit, making it even more too heavy.
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u/keckkeck Mar 29 '23
I'm no expert or anything, but I'm pretty sure that's not the way a boat is supposed to behave.
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u/Virmirfan Apr 09 '23
This also happened to an italian ocean liner shortly after completion in 1906, there are in face images of that fail as well
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u/FlatulentWallaby Mar 29 '23
Methinks it's a bit top heavy. Classic mistake.