There’s some funny comments on here! But the truth is it’s a lot easier to weld the hull plates with it upside down so it’s a common practice. Though the flipping is usually done on land, I’ve never seen it done in the water before.
Barges and work platforms are flipped over for a number of reasons. When a flat bottom barge is flipped though it can be done with a 10 horse pump. The sleeker shape of that hull bottom,, I've no idea if the cheap trick would work. just don't know. Barges are flipped by filling to about half full and then roll them over, then pump out again. The flip can be accomplished with dock lines and gravity. May not be deep enough in that river.
it was manufactured upside down because it's easier to lay a big steel plate and weld it rather than trying to lift all the big heavy plates and support them without flex while a guy stands under it and welds each plate. the prop and shaft were not installed yet due to the force of impact as it flops over would bend the shaft. no dummies here
Up to a certain size, it's much easier to build a boat hull upside-down. You can lay the flat deck on a shop floor, or on simple supports, and build up from there, with no need for expensive, custom framing, and with minimal need for overhead welding. Ask anybody who's built their own boat, and they'll probably tell you they did it upside-down.
My father many years ago used to turn barges over when afloat by partially flooding them passing ropes over the hull to the far side and towing them broadside on The deck edge nearest the tug would go down the water inside the hull would rush down and over it would go No cranes just a tugboat
Looking at the design of the hull no wonder in rough weather when the cargo shifts those ferries sink and roll over? That flat haul is a double edge sword!
ronstacie3 They had to haul the hull from the water in order to build the hall that houses the vehicles for transport. Before they flipped it over. Surely the checked for holes. Maybe the word, "holes," may have taken it too far.
TWTR4EVER No keel, a heavy load on the main deck, and no stability nacelles. It really does sound like these vessels should not be out in harsh seas. Whenever there is a small craft advisory, ferry ships should not sail.
Indrid Cold Back in the 1980's I did a crossing at the beginning of winter of the English channel from Dover (England) to Calais (France) in a ferry called "The Herald Of Free Enterprise". A few weeks after, the same ferry crossing I believe from Rotterdam or Amsterdam (Netherlands) back to Dover (England) in a storm, the ship capsized!
Herald of free Enterprise capsized when leaving Zeebrugge port 4 minuts after passing the last mole. Here bowport was still open when coming out in heavy seas.
Actually, the USS Merrimack was a wooden frigate with auxiliary steam power. Burned to the waterline during the evacuation of Norfolk Navy Yard in the opening days of the war, she was later rebuilt as a casemate ironclad and rechristened CSS Virginia.
Any boat I think I ever seen built was built right side up and launched into the water. Apparently ferries are built and launched upside down then rolled over.
Makes sense regarding the welding , easier that overhead welding process . Why not install the shaft and propeller too when the work areas are is exposed ? Thanks
Borderline Alcoholic They realised it was built upside down after they launched it and the people trying to build the wheel house on the deck kept drowning. After the autopsies findings, they figure they should turn it over to build the wheel house and to make it easier to carry vehicles.
I worked in a shipyard in San Diego (not National Steel) & we built tuna seine 1200 ton net load and we launched the bottom of the ship upside down and then flipped it hauled it back onto the building ways and added the top and relaunched several months later
I guess they wanted to get both sides wet. Those tugs are quite maneuverable. Quite a bit of strain on those large cranes from the cable whip once the hull was righted.
It may be a good idea for them, considering the different logistics. It could as well be that this method was invented by Norwegians to suite special conditions of ship building.
Because it was built upside down. It's far easier and less damaging to turn the hull right-side-up in the water in this case. If you turned this hull on land it would require massive setup effort. Normally, if you build a small hull upside down you don't have a deck on it which would allow this kind of operation. Also, the superstructure and fit-out can now be completed afloat, freeing up yard space for another build.
I think this is an ingenious design. It appears as though they are taking into consideration cargo door failures at sea which result in the flooding and sinking of many ferrys. If the hull is not exposed to flooding it wont sink...like a single huge pontoon....even if the ferry rolls over it wont sink giving everyone a better chance of survival.
Its only the bottom of a Ferry so they are still working on it. Maybe they cant flip it over in the boat shed to keep working on it so use the water to help flip it
I researched this one and apparently the hull was designed in the Southern hemisphere, they did not take this into account during the build and had to wing it.
Makes sense. Lot easier to build a ship hull upside down than right side up. The same massive cranes will lift the engine and superstructure into place.
I can see a cluster of tiny boatyards from the bridge on my way home, and one day I was shocked to see a capsized barge bobbing in the tight confines of their tiny inlet! Subsequent trips confirmed that they had simply careened the thing like a rowboat and dragged it up the ways to work on the underside. How they managed this with the small space and limited equipment available, I have no idea.
Millions and millions of years ago, DINOSAURS roamed the Earth... One day, a mommy dinosaur came to realize she could love a daddy dinosaur very, very much.
They should have left it like it was when first launched. Imagine this...you're on a Carnival Cruise or the like, lounging out on your balcony and having the time of your life, and then this thing cruises up to your ship. I don't know about you, but I would be scared shitless!!!
probably due to the prop an the prop guard being there? they probably didnt want to scrap it all off so its better to keep the hull intact than have it be damaged.
@sonymclaren All subs are Stealth. unlike stealth planes that just have a low radar cross section, subs have zero radar cross section. hens the invention of sonar lol. Many subs have reduced sonar cross sections as well, and utilize nuclear and/or electric power to make them very quiet too. ;)
In order to design this process to flip the hull over, engineers would have to do the structural analysis to ensure no harm is imparted on the structure from the lifting operation used to flip it. There is inherent risk in this kind of loading because Engineers often overlook important details because they are human. The worst case would be if this loading during flipping would be responsible for adversely affecting the structure thereafter and could result in some kind of disaster if design and Analysis where improperly performed.
Please understand, I know nothing of shipbuilding, but I have to ask, why the hell don't they just build it / put it in the water right-side-up in the first place?
Several people have got it! The designer comes back at 3:00 - "No! No! You've got it wrong! It's a stealth hovercraft for the US Navy Seals - you'll have to re-capsize it again. Sorry lads!"
I've been building commercial fishing vessels to be used in the Gulf of Mexico and on the East Coast of the United States in the Atlantic since the 1970's. I can think of a very few reasons, ( Moronic at Best ) , to flip a vessel W/O it's shaft and propeller.
so its cheaper to build it while afloat as it not considered boat construction, just repair, and they can have it done by ships carpenters, they don't have to pay the ship fitters & ETC. union?
I thought they would pump it full of water, play with the center of gravity, get it capsize, and them pump the water back out, but they used cranes instead. If you just happen to have some big cranes handy, well.
what class is that ? sorry look like a civil war iron clad with a swamp pushing fan wow out of the box thinking on this one low draft fast moveing now if it cud submerge too then you have something ..
Oh my goodness!!! This is the strangest thing! Well, you never cease to learn!
NOOOOO!! Flip it back to the way it was. Looks like a futuristic hovercraft.
This would have gone a lot better if they'd had all these UA-cam experts there to assist.
There’s some funny comments on here! But the truth is it’s a lot easier to weld the hull plates with it upside down so it’s a common practice. Though the flipping is usually done on land, I’ve never seen it done in the water before.
That worked out nicely.
Very interesting. I am amazed how shallow the draught is.
Next time remember: If the writings on the blueprint look strange and are difficult to read... you're holding it upside down.
+Mikosch2 Maybe the ship was originally designed to operate in the southern hemisphere.
Barges and work platforms are flipped over for a number of reasons. When a flat bottom barge is flipped though it can be done with a 10 horse pump. The sleeker shape of that hull bottom,, I've no idea if the cheap trick would work. just don't know. Barges are flipped by filling to about half full and then roll them over, then pump out again. The flip can be accomplished with dock lines and gravity. May not be deep enough in that river.
it was manufactured upside down because it's easier to lay a big steel plate and weld it rather than trying to lift all the big heavy plates and support them without flex while a guy stands under it and welds each plate. the prop and shaft were not installed yet due to the force of impact as it flops over would bend the shaft. no dummies here
Up to a certain size, it's much easier to build a boat hull upside-down. You can lay the flat deck on a shop floor, or on simple supports, and build up from there, with no need for expensive, custom framing, and with minimal need for overhead welding. Ask anybody who's built their own boat, and they'll probably tell you they did it upside-down.
My father many years ago used to turn barges over when afloat by partially flooding them passing ropes over the hull to the far side and towing them broadside on
The deck edge nearest the tug would go down the water inside the hull would rush down and over it would go No cranes just a tugboat
Absolutely fascinating that they launch it upside down then flip it.
Seemed like a good idea at the time....
Upside down it looks like the latest state-of-the-art military Stealth Warship.
Looking at the design of the hull no wonder in rough weather when the cargo shifts those ferries sink and roll over?
That flat haul is a double edge sword!
hull, not haul
ronstacie3 They had to haul the hull from the water in order to build the hall that houses the vehicles for transport. Before they flipped it over. Surely the checked for holes.
Maybe the word, "holes," may have taken it too far.
TWTR4EVER No keel, a heavy load on the main deck, and no stability nacelles. It really does sound like these vessels should not be out in harsh seas. Whenever there is a small craft advisory, ferry ships should not sail.
Indrid Cold Back in the 1980's I did a crossing at the beginning of winter of the English channel from Dover (England) to Calais (France) in a ferry called "The Herald Of Free Enterprise". A few weeks after, the same ferry crossing I believe from Rotterdam or Amsterdam (Netherlands) back to Dover (England) in a storm, the ship capsized!
Herald of free Enterprise capsized when leaving Zeebrugge port 4 minuts after passing the last mole. Here bowport was still open when coming out in heavy seas.
For a second there, I thought they built a new USS Merrimack.
Actually, the USS Merrimack was a wooden frigate with auxiliary steam power. Burned to the waterline during the evacuation of Norfolk Navy Yard in the opening days of the war, she was later rebuilt as a casemate ironclad and rechristened CSS Virginia.
Jeff, so on the same wavelength...
Now that would make a nice HOUSE BOAT platform with garden pool and everything
Any boat I think I ever seen built was built right side up and launched into the water.
Apparently ferries are built and launched upside down then rolled over.
Slick! Very impressive! Amazing what professionals can do.
I agree with Max; I would have expected the prop and shaft to be installed prior to flipping it.
Hulls constructed this way using vertical down welding are stronger. It does look like a
new age stealth Ironclad too.
okay that is the most unusual launch I have ever seen.
Makes sense regarding the welding , easier that overhead welding process . Why not install the shaft and propeller too when the work areas are is exposed ? Thanks
Damage when flipping.
I worked on this vessel and the shafts and wheels were not in yet plus they wanted to make sure the paint on the hull was ok when they drydocked her.
Sound costs extra.
Nice bit of lateral thinking., Inventive; Courageous and it worked., Well-Done :)
Wow! I've never seen that done before!
They had the plans upside down all along!
Wouldn't it be easier to install the prop shaft before rolling the hull over?
Real man's work, here.
It's clearly a stealth attack ship with a forward firing energy beam weapon. Very high tech.
I wonder when they first realised they'd built it upside down.
Have you seen the film :
Kirsten Dunst in Upside Down (2012)...
Was this built in Mississippi?
MKKK
L
&@
KKK
M Borderline Alcoholic
Borderline Alcoholic They realised it was built upside down after they launched it and the people trying to build the wheel house on the deck kept drowning. After the autopsies findings, they figure they should turn it over to build the wheel house and to make it easier to carry vehicles.
Lol...
I worked in a shipyard in San Diego (not National Steel) & we built tuna seine 1200 ton net load and we launched the bottom of the ship upside down and then flipped it hauled it back onto the building ways and added the top and relaunched several months later
This was three years ago, that seems like enough time to continue this.
When I bought my new boat they told me #1 rule was to launch with the propeller-side down!
Well, thats one way of doing it I guess. You could have put the prop & shaft in while it was upside down?
I have to wonder what the side of the hull looked like that came up against the dock, you can see it hit's when coming over.
I guess they wanted to get both sides wet. Those tugs are quite maneuverable. Quite a bit of strain on those large cranes from the cable whip once the hull was righted.
Hats off to the guy who noticed somethin wasn't quite right.......before they put on the Deck.
very special kind of constructing ships I have to say ;) ...
Man I would like to hang about 30 big outboards on the stern. It would be like the worlds biggest hydroplane.
It may be a good idea for them, considering the different logistics. It could as well be that this method was invented by Norwegians to suite special conditions of ship building.
I thought they would partially flood the hull and then airbag one side of it?
??? I never saw a boat launched upside down before....Is this something new ???...very interesting concept !!!
Because it was built upside down. It's far easier and less damaging to turn the hull right-side-up in the water in this case. If you turned this hull on land it would require massive setup effort. Normally, if you build a small hull upside down you don't have a deck on it which would allow this kind of operation. Also, the superstructure and fit-out can now be completed afloat, freeing up yard space for another build.
If something breaks the hull falls toward the cranes. Or am I missing something?
I think this is an ingenious design. It appears as though they are taking into consideration cargo door failures at sea which result in the flooding and sinking of many ferrys. If the hull is not exposed to flooding it wont sink...like a single huge pontoon....even if the ferry rolls over it wont sink giving everyone a better chance of survival.
That's a different way of launching a hull than I've ever seen.
People are only giving it thumbs down because they tuned in and were deprived of fail.
If those cranes had toppled over, this video would be on, "Worlds Worst Engineering Disasters"
Actually its really smart and cost effective
that's exactly what I thought.
Finally they realized since 1865 the war is over, ironclads no longer needed, so they rolled it and made it a ferry.
Looked really cool while upside down.. wish boats looked like that and just sliced through the waves...
Google "Great Lakes Whale Back"
They were an interesting concept...
Its only the bottom of a Ferry so they are still working on it. Maybe they cant flip it over in the boat shed to keep working on it so use the water to help flip it
That's some engineering there...
I researched this one and apparently the hull was designed in the Southern hemisphere, they did not take this into account during the build and had to wing it.
Makes sense. Lot easier to build a ship hull upside down than right side up. The same massive cranes will lift the engine and superstructure into place.
@gascat100 if they tried it in the state its in it would probably break. Does not have much reinforcement at this stage in construction.
I can see a cluster of tiny boatyards from the bridge on my way home, and one day I was shocked to see a capsized barge bobbing in the tight confines of their tiny inlet! Subsequent trips confirmed that they had simply careened the thing like a rowboat and dragged it up the ways to work on the underside. How they managed this with the small space and limited equipment available, I have no idea.
Ok.........THAT WAS COOL 👍🏼
Millions and millions of years ago, DINOSAURS roamed the Earth...
One day, a mommy dinosaur came to realize she could love a daddy dinosaur very, very much.
Hey guys look over here, some paint is drying.
wo7uld think the prop would be in there before the roll over
Oops!
can't big tugs just do a 'wrap around' tug of war flip manouvre as soon as it's launced?
That is what I was thinking, my first thought was it looks better the first way.
How they going to put the propellers in now?
They should have left it like it was when first launched. Imagine this...you're on a Carnival Cruise or the like, lounging out on your balcony and having the time of your life, and then this thing cruises up to your ship. I don't know about you, but I would be scared shitless!!!
What's the purpose in launchig a hull upside down and flipping it over later?
probably due to the prop an the prop guard being there? they probably didnt want to scrap it all off so its better to keep the hull intact than have it be damaged.
Looks more stable upside down... No wonder those ferries capsize all the time.
*eastonia flashback*
Justin Hooper -
How do they roll out their cars?
That was ferry interesting.
They either printed the plans upside down, or put the "UP" sticker on the document tube the wrong way. ;-)
it looks cooler upside down. like a high tech submarine
OML WERE THERE PEOPLE INSIDE OF IT?!
No wake zone....cool!
And how would you propose going about it then? By balancing it on the keel? Doesn't sound like very a waterproof idea, if you'll pardon the pun...
@sonymclaren All subs are Stealth. unlike stealth planes that just have a low radar cross section, subs have zero radar cross section. hens the invention of sonar lol. Many subs have reduced sonar cross sections as well, and utilize nuclear and/or electric power to make them very quiet too. ;)
I can't wait for the sequel?
+Hisako Reichmann "Roll Over 2 More Times: Forgot the Prop and Shaft!"
Stupid question: Wouldn't it have been easier to install the prop and shaft while the hull's still upside down?
In order to design this process to flip the hull over, engineers would have to do the structural analysis to ensure no harm is imparted on the structure from the lifting operation used to flip it. There is inherent risk in this kind of loading because Engineers often overlook important details because they are human. The worst case would be if this loading during flipping would be responsible for adversely affecting the structure thereafter and could result in some kind of disaster if design and Analysis where improperly performed.
hey what branch of conrad ??? is it in the deepwater facility???
I'm pretty sure that this was the intended way of launch. not an accident at all.
is this made in Amelia, LA?
What happened to the propeller and shaft!!!
Probably just a floating test..
Please understand, I know nothing of shipbuilding, but I have to ask, why the hell don't they just build it / put it in the water right-side-up in the first place?
Bouncy puppy with no engineering/ballast below!
That's not the tooth ferry is it?
Several people have got it! The designer comes back at 3:00 - "No! No! You've got it wrong! It's a stealth hovercraft for the US Navy Seals - you'll have to re-capsize it again. Sorry lads!"
I've been building commercial fishing vessels to be used in the Gulf of Mexico and on the East Coast of the United States in the Atlantic since the 1970's. I can think of a very few reasons, ( Moronic at Best ) , to flip a vessel W/O it's shaft and propeller.
I feel like their was an easier way to do this....
so its cheaper to build it while afloat as it not considered boat construction, just repair, and they can have it done by ships carpenters, they don't have to pay the ship fitters & ETC. union?
its the only way to curve the steel panels, facing downwards
@puiselo Well how would I know? I just clicked on the link and saw a ship sink...how on earth could those people get out so fast? Interesting...
I thought they would pump it full of water, play with the center of gravity, get it capsize, and them pump the water back out, but they used cranes instead. If you just happen to have some big cranes handy, well.
Thats how I would have done it. Water and compressed air
Looks a little like a modern day Civil War Ironclad.
what class is that ? sorry look like a civil war iron clad with a swamp pushing fan
wow out of the box thinking on this one low draft fast moveing now if it cud submerge too then you have something ..
Looks like a stealth hovercraft.
What is this?
Why roll over?
It's a boat.
Because everyone who rode on it would drown if they didn't.
does somebody wana tell me why they dont just put it in right side up....?
Definitely headed back to dry dock.. the prop and shaft are missing!
'
no wonder this ship cannot rolling over itself without 2 cranes helpers...
what is that flat ship and what use for
Building the thing right side up seems to make a lot more sense at this point...