How Do Ships Stop?
HTML-код
- Опубликовано: 22 май 2024
- Imagine you're enjoying your summer cruise through The Bahamas, soaking up the sun and sipping on a tropical drink. Suddenly, out of the crystal-clear water emerges a giant stop sign, as if Poseidon himself decided to regulate maritime traffic. Your boat needs to stop but there's a perplexing dilemma - you realize your boat doesn't have brakes! In this exploration of naval engineering and physics, we dive into the unique challenges posed by the open seas and the reasons ships can't come to a sudden halt like land vehicles. From the vast oceans to the intricate mechanics of vessels, discover the science behind the absence of brakes on ships and the ingenious solutions employed to navigate the waterways safely.
00:00 INTRO
01:27 Ships and Their Speed
02:18 The Steam Engine
02:55 Titanic Sea Trials
03:26 Crash Stop
05:30 How Do Big Ships Handle At Sea?
07:27 Using Inertia
08:21 Day to Day Operation of Big Ships
10:05 Fitting Ships With Brakes
11:32 Conclusion
12:04 - OUTRO
Oceanliner Designs explores the design, construction, engineering and operation of history’s greatest vessels- from Titanic to Queen Mary and from the Empress of Ireland to the Lusitania. Join maritime researcher and illustrator Michael Brady as he tells the stories behind some of history's most famous ocean liners and machines!
#HowToSlowDownALargeShip #StoppingAMassiveShip #ShipBrakingTechniques #GiantVesselStoppingMethods #MassiveShipDeceleration #BringingABigShipToAHalt #LargeVesselStoppingProcess #ShipStoppingMechanismsExplained #BigShipSlowdownStrategies #DockingAHugeShip #brakerepair #carsafety #shipbrakes #ShipMaintenance #vehiclesafety #mechanic #brakes #technology #automotive #mechanicalengineering #shipmaintenance #carrepair #brakefailure #ship #car #safetyfirst #vehiclemaintenance #youtuber #tutorial #titanic #oceanlinerdesigns #mikebrady #history #facts #ship 
Развлечения
Unlike ships, which will, hopefully, always be able to stop when needed, I sincerely appreciate our friend, Mike Brady, from Oceanliner Designs, and his non-stop effort to bring great content to us.
He's not my friend. I never even met him. He's not even a acquaintance. It irritates me that he says it.
hear hear
to the original comment
@@tarstarkusz brother, we all are your friends whether you like it or not. Accept the love or get crushed by it
@tarstarkusz "grrrr stop being nice!! 😡😡"
Awwww want a hug widdle baby?😢@@tarstarkusz
Like how you throw (physically) 5 Titanics on the screen, it really gets me.
what
It's a real sinking feeling.
...I'll see myself out.
He has REALLY STRONG arms! 😮
@@TheEDFLegacy 🤣
Lol
Today, of all days, this video get recommended to me. The day the ship knocked down a bridge in Baltimore
"How Do Ships Stop?"
"They hit a big rock in the *insert body of water here*"
I guess an iceberg is a giant ice rock so the math checks out thus far
Does a bridge also count as a rock? Asking for a friend...
BABY WAKE UP OCEANLINER DESIGNS JUST POSTED!!!!!! (also love the content)
youtube has jokes recommending this to me now!
I just found this channel from his main video on the collapse, and immediately checked his back catalog. When I saw this video, I had to watch it immediately.
This is not 🚫 a joke 🤣
“This is how ships stop at sea”
-My friend Mike Brady from Oceanliner Designs
Mike Brady is such a superstar name.
you are mistaken. He is in fact MY friend Mike Brady from Oceanliner Designs, he told me so at the beginning of every video
I think you will find, Mike is my personal friend. When it comes to maritime matters.
I'll bet the Ever given has one whoppa of a propeller
Yes he did say that didn't he?
Hmmmm ....that's funny because I might need to hit my friends up for a small cash loan!
A couple of small points:
1) Not only is the weight of the ship moving, you also have a lot of water that is in motion. This makes it even harder to stop quickly.
2) On ore carriers on the great lakes the amount of engine per ton is a lot less and as a result, full astern doesn't do much.
Very convenient this gets recommended to me following recent events in Baltimore 🤔
130 fletchers. yeah but what's that in metric? 5 titanics.
130 Fletchers or 5 Titanics...sounds like Mike Brady in Australia is well acquainted with the American way of avoiding any and all metric measurements by saying how many this or that or using "freedom units" as some call them.
Ironically, Britain is one of the countries who use non-metric measurements today
the timing on this!
No matter what aspects about ships you put out on this channel, even me who has barely been on any ships, will always watch it because you make it interesting. Thank you Mike! I always think hopefully this’ll come in handy for trivia someday 😂
Same, I've worked on ships only because I was in the French Navy, but as a helicopter pilot ^^. But damn, his channel is gold. =)
@@fridaycaliforniaa236dude that’s awesome, good for you
London busses are a unit of measurement
anything can be a unit of measurement, i in fact measure the weight of modern vehicles in number of 'lizzo's' , for example a cadillac seville is 3 lizzo's, a Harley Fatboy is 1.75 Lizzo's
so are football fields, but that doesn't differentiate between the NFL, the CFL or the Premier League. It depends on what county you are in.
@MunkyGameDesign So that means that a Lizzo is about 250 pounds? But wait, a Cadillac Seville would be more than 3 Lizzos. More like a dozen.
Yall will use anything else except the imperial system for measuring XD (couldn't resist)
@@TheGoddamnBacon But are you talking about length? Distance? Weight? Volume?
just wanna say the new intro music works REALLY well with the iconic foghorn! although... is it just me or has the foghorn gotten a little muted?
Yeah it sounds a little quieter. Was the horn taken from any real ship? I am genuinely curious. It does sound like an ocean liner horn.
Not sure about wanna taking over want to . There seems to be this thing where people think it's cool not to pronounce Ts I'm not sure what this is about lol
How do ships stop? Simple, they screech to a halt like a cartoon character.
Oh... the YT algorithm has quite the sense of humor.
I remember an old 90s tv show where Jeremy Clarkson was on the Jahre Viking ( at the time the biggest man made moving object ever, not sure if it still has that record) and the Captain said it takes her 5/5.5 miles to stop from full speed
It does still hold that record, or at least the record of the longest self-propelled vessel. It was scrapped back in 2010 though.
It's on RUclips. Just type in jahre Viking
A good segment by Clarkson, That man can make anything interesting
@@jspaceemperor420 The only thing that would have made that show better is if we got to see the ship in drydock.
Those big ships and the engineering are just amazing.
Wait, they really do this? You're telling me they DON'T put everyone's hand and feet in the water? I realize some boats are really tall. This is what portholes are for.
Hi Mike,as a retired marine engineer with 32 years in tugs I find you channel very informative and entertaining.Cheers,Roly🇬🇧.
voice: titanic could stop in 780 meters.
me: that's a long way...
voice: three ship lengths
me: ah... yeah that's actually very impressive.
this is a suspiciously relevant video
The ship used for USS Indiana appears to be the Indianapolis or one of her sisters, they of course being WW2 cruisers whereas the USS Indiana was a battleship laid down in 1891 and looked vastly different. Theodore Roosevelt passed away before the Indianapolis was laid down
Correcdft, USS Indiana BB1 was a pre-dreadnaught.
There was also a USS Indiana - BB58, a South Dakota class fast battleship.
I was born, raised and live in Indiana. The USS Indiana is my favorite battleship, and the SoDak class is my favorite all around class. They look like brawlers, and were.
@@kurtkuczynskiMassachusetts on Jean Bart, South Dakota getting the bad end of a three way engagement between herself, Washington, and Kirishima - and then Indiana and Washington having a major oopsie - yeah, the SoDaks were absolute units. Glad that we still have two of them.
As the news from Baltimore are trickling in😢, I've sent this video to several people already, so that they have some general background information on how to stop a ship - before the wild online speculations start
We learned that hitting something does technically count as "stopping".
_EDIT: Context for future viewers - a ship lost power and couldn't stop before hitting a bridge in Baltimore just three weeks after the video was posted._
Thank you Mike for another very interesting video. In 1961 my parents did a cruise from Wellington to New York on the JVO. I remember my father talking about how long it took to stop when a man jumped overboard to swim to a nearby island. I think that he said it was over one mile. They picked up the bloke and threw him in the brig as he had also set fire to his cabin, he thought that the island was quite close, it was over three miles away! All the best from Sydney.
odd this shows up recommended this morning.
Really good and informative video btw. 👌🏽
By driving into a suspension bridge obviously
In open seas, if the engine is stopped at full speed, the propeller is still driven ahead by the water flow and so is the engine because it is a direct drive. It is impossible to start the engine astern unless the speed is sufficiently reduced. This is done by injecting compressed air in the cylinders. But the reserves of compressed air are very limited and it is not certain that enough air is left to start the engine astern. This manoeuvre is tested during sea trials but at this time, the ship is empty which makes a big difference compared to normal use of the ship !! In my opinion as former Captain, the most efficient way to stop a ship in open seas is to do sharp turns (for example, performing the "Williamson Turn") but remember it's not the bow that moves, it's the stern !!! Anyway, thank you so much, Mike, for this comprehensive video !
Yes, and in tight spaces, it pays to remember the rudder is second order. In order to move to port, the stern moves starboard. If there is wind pressure on the bow, the whole boat moves starboard.
The new intro's amazing, mike. Like it a lot
Several commenters have already mentioned Variable Pitch Propellers and Auxiliary Propulsion Units. In the US Navy, PERRY, SPRUANCE, TICONDEROGA and BURKE class ships as well as others have variable pitch propellers powered by gas turbine engines (GTE), GTE's turn the propeller shafts in the same rotation all the time. It is the propeller blade, which can rotate on the hub, that determines forward or rear movement. From full power, SPRUANCE class ships could stop within their own hull length (563') and then move in reverse without stopping the rotation of the shaft. Certainly the torque on the shafts (in particular the over 400' long port shaft) was tremendous. But this was designed into the structure of the shaft and shaft bearings. PERRY class frigates, with only one shaft, also were equipped with an APU near the bow. It could move the ship at about 5 knots itself and was fully 360 degree maneuverable when deployed.
R. Rose, PNC(SW), USN(Ret)
The ship in the video thumbnail picture looks amazing. You do well, Mr. Brady. I always enjoy watching and learning from your videos. You do well.
Man, Titanic was a true super performance ship. It is amazing and forever will be for a ship to stop from 21 knots in less than 1 km, despite being almost 900 ft long.
full stop in 3 ship's lengths ?!
impressive.
I guessed more than a mile.
It really is. Try doing the same with a car or airplane; it isn't going to happen.
@@grayrabbit2211it's worth watching Alaska Bush pilots doing their short takeoff and landing competitions. There's some that can take off and land in less than one plane length. Really crazy to see.
Our friend, Mike Brady from Ocean liner Designs!!! ❤❤❤😊
i never realized the complexities of ships, until i started watching your channel
I hear bridges can also serve as a braking device.
Um they should give it a try.
Subtle thing, but I like the new intro. The section plans forming into the 3D model, very thematic. Elegant.
There is also something called 'anchor turn'.
Unlike what 'Pirates of the Caribbean' showed, you don't actually drag the anchor along the bottom. You lower it just a few meters, and let it act as a parachute whipping the ship around. I don't now if civilian ships do it, though.
The last ship I'm aware to have done this was the IJN support ship Akitsushima, a flying boat and seaplane tender who dropped anchor to avoid aircraft attacks during the battle of Rabaul.
yeah, its done, but in that category of "holy hell, i never want to do that in anger". but if your captain has any salt in his socks, probably something you want to know how to do, should you ever need to. its a sound that makes you think yep, im loosing my bow. and you kinda need that bit to keep being a boat. ive done it twice, a stout steel trawler and a fibreglass sailboat. neither time was anything close to fun. If full astern isnt enough, run them the fuk over. you have time to navigate away in a sailboat for sure, for cirtan in a motorboat. dont get run over. if you do, its kinda on you. TLDR, dont be a dick on the water. you'll probably loose. have fun with that. we have rules for a reason.
Love the new intro, the Ship horn fits the melody so much better than it did before - great work Michael!
This is absolutely fascinating, and something I had never considered before. Thank you for sharing, Mr. Brady.
Throwing one of those ships into reverse at full speed and full power must put monsterous forces into the thrust blocks and whatever they're attached to. Good info.
Excellent video, Mike! Also, I noticed new opening titles and visuals - excellent work there, too.
This new intro is brilliant. Another masterpiece from you guys!
Regarding what you said about smaller boats staying out of the big shipping lanes reminds my husband of someone he knew who worked in the Merchant Navy. He had the most chilled out captain who everyone on the crew respected and got on with.
Here are a few examples of what experiences he spoke of.
There they were sailing along in a big bulk carrier and a small sailing boat is on an intercept course. A call comes over the radio to the captain on the bridge, and the gentleman on the small boat is demanding they heave to and make way!
The captain looks at the bridge crew, looks and the boat says, 'No can do'.
The gentleman then says, 'You have to stop your ship, Sail before steam.'
Again the captain says, 'No can do' He is much, much bigger.
The gentleman again demands that they stop and let him past, with the phrase, 'sail before steam', repeated.
By this point the captain is bored, plus he cannot stop due to the immense size, and he is in his legitimate shipping lane.
The old boy demands, 'Stop, sail before steam,'
and the captain says,' Do what you want mate, I'm burning diesel',🤣 and carries on.
Another example, is that they are out in the middle of the ocean on an oil tanker and over the radio comes a call from US jets, that they are going to do a low level buzz over the ship. No asking, just telling.
The chilled out captain just replies, 'OK, not a problem, but be aware we are venting propane'. (This has to be done as it comes out of oil naturally and has to be released because it will explode if you don't). 💥💥
The jets became visible on the horizon, got visibly bigger as they screamed towards them, then both of them pretty much stood upright on their jets and shot off sideways at 90 degrees at high speed. Brilliant bit of piloting👍👍. They certainly got to test their flying skills that day.
His mate said to the captain, 'Are we venting propane today?'.
The response, was, 'No, but fuck 'em. Arrogant yanks'. 👎👎🤬 He didn't appreciate them 'telling him' they were going to buzz over as opposed to asking if it was OK.
Another story not relating to stopping, but returning to the ship at Panama. They have their own dock police, so they have to go through security/customs. They are all stood in line with their documents and there is a complete dragon on the counter checking the papers.
The captain goes in front of my husband's mate and the dragon says, 'Any criminal history?'
The captain simply gives her a lopsided smile and says, 'I'm sorry, I never realised you still needed a criminal record to be a ship's captain.'
The dragon instantly blushed and giggled like a schoolgirl and let him through.
His mate then stepped up to the desk, and she instantly reverted into full dragon mode.🐲🐲
This last one is not so much to do with encountering other ships or planes. But the captain did a favour for someone in Panama and was asked what he would like as payment. He thought for a moment and asked for a full size snooker table. Sure enough, he got a snooker table. It was set up in the restroom and became quite the focal point. It was set up on mahogany beams that were stored on the ship. When the sea was nice and calm, he would have a game and would call down to engineering to adjust the ballast, so the table was level.
News of this table started to spread, and when the top brass visited and everyone was on parade in full dress uniform, the brass would approach, introduce themselves, and then they would quietly ask,' Is it true what we hear..... that you have a snooker table on board?'
He would say, 'Yes sir.' 😊😊
The brass would smile and say, 'May we see it, please?'
He would of course oblige, then they would all have a game of snooker. It was the best icebreaker ever, and they could talk about all manner of things while having an enjoyable game. 😁😁
To my husband's knowledge all of these are true incidents as his mate was no one to tell tall stories. He said, that he felt it had been a privilege to sail with this captain, as he had been a pleasure to serve with and made other people's jobs that much easier. Very switched on but very fair. Makes you wonder what does go on with the various ships around the world and their crews!!🤔🤔
Absolutely love your content man! easily one of the most underrated channels on RUclips. keep up the great work as always
Another great video! It's so important for smaller craft to always give way. Unfortunately, every summer we here on Lake Erie see small boats playing "chicken" with lake freighters and "salties." Dangerous business!
Interesting content, which is, crucially, very well presented. Congratulations on an excellent channel.
Cheers
I really enjoy your information on ships and shipwrecks I've always have been fascinated with them
New intro!!!! Looks really good nice one mate.
Great video Mike. Hope to see more! (Also nice new intro)
Your intro theme score synced perfectly with the note frequency of the foghorn sound over your "Oceanliner Designs" logo.
Just listen to that perfect matchup from 1:18 until logo. Magic 🎼🎵
2:41 "expansion steam engines" "Christopher Columbus" expansion indeed xD
Well put together and interesting video, thanks!
Very informative. Thanks.
Thanks for the info mike! i love the new style of videos you make. you've really advanced in video making since i first learned about you! keep up the good work!!
Love your humor and seeing you means I learn sth. today.^^
Since ships float on water like hot-air balloons float on air, it's likely impossible to stop being buffeted about by the waves and currents without poking a hole in the hull and coming to rest on the ocean floor. Submarines, on the other hand, are essentially airplanes of the liquid sky, and thus one would naturally assume that they stop by lowering their landing gear and engaging their thrust reversers.
My man i love your videos mike
Very interesting video, as usual. Great job. Thanks, Mike !
Great information! Thank you for the video!
Awesome explanation of braking! I love how well that puts the Ever Given's insane size in perspective too to compare it to multiple Titanics. And yes - very wise small-vessel advice. As an avid kayaker, that's a very base rule; do NOT get in the way of larger vessels. We call it the "might has right" rule.
its no different than an RR crossing for cars, the train is bigger so stay off the tracks because train always wins.
@@filanfyretracker - Exactly!
Nicely done, including the new intro!
Beautiful content Mike. Thank you very much. Looking suave too, there, mate 😎
Dear Mike,
I truly appreciate your channel as well as the enormous work underlying.
On this topic, however, there are some considerations. Basically there are three propulsion systems in the merchant marine:
1) Slow running two-stroke Diesel engines, vaiable RPM, acting directly on the vessel`s prpopeller shaft. That means, if you want to use the propeller to support stopping you'd have to crash-stop the engine (already bad) and restart it turning in reverse (worse). No good option, because it strains the whole powerplant to the the utmost
2) Medium speed four stroke Diesels. They usually run at constant RPM irrespective of engine load, acting on the propeller shaft by reduction gear and on a variable pitch propeller. For reversing, only the propeller pitch will be altered. Strain is there, but it won't kill the engine plant
3) As with most modern cruise ships, there is Diesel electric propulsion. I.e. Diesels are just providing electricity and propulsion motors consume whatever power they need, there is no mechanical connection between powerplant and prpulsion unit. Usually these propulsion motors are housed in the gondolas of azimuth drives (Azipod). Breaking there is best achieved by turning Azipods outward and going to full thrust against each other - the breaking moment is induced by the paddle wheel effect.
Happy to chat if you`d like.
Best regards from Hamburg, Germany,
Meyerchen
That intro. was fire man!!
I feel like I need your accent to retain the information, especially on the first go around. You could be the world’s finest professor. The delivery of information, the connections, I just cannot get enough of OLD ❤
Thank you,Mr. Brady, for another interesting and informative video. Looking forward to seeing more.
I have only been on any vessel twice in my life and yet I am hooked like hell.
I’m so glad you’re my friend, Mike Brady. 😊
Thank you for this video 😊
Thank you for more excellent content my friend mike Brady.
Depending on the rudder design, you also have the option of 'Closing the barn doors'....turning the rudder(s) completely sideways and effectively dragging a wall through the water.
Hey Mike, It's your friend Winton McReady again. LOL.
Thanks for another great video.
The "How to Avoid Huge Ships" book is finally a relevant material for this video!
Love your channel, Mike.
Best regards.
My father was a Master at sea and then became a harbour pilot in Auckland NZ, he was always on about the sail boats that would cut under the bow of ships coming into port as some ships could take up to 5 miles to come to a full stop. Ocean liners have good power and multiple props but some cargo ships are very under powered for their size, fine at sea but slow to react. As a teen I have been out on the pilot boats .
I love the new intro Mike.
Excellent as always
Love the intro!
Ships don't have brake pedals, but they do have a system that tells the engine room crew to slow down. They enact the brake system which consists of large flaps of steel that fold out from the hull, bringing the ship to a stop. I used to do that when I was in the US navy.
Much love from Zimbabwe
Much respect Mr Brady
Excellent work on your video you have an awesome RUclips channel I like the documentaries as well on Maritime history.
I'm like "Yay a non titanic video" Mike Bridy proceeds to use Titanic as a unit of measurement.
Great video, very stylish.
Amazing how large and fast ships are now! Thanks for the helpful comparison descriptions of the Ever Given's specs.
Proper football used, nice 👍
Stay out of Shipping Lanes. reminds me of the collision between the steamer Bangor Packet and a small fishing/excursion vessle called the Bluebird near Kennebunkport, Maine.
That is a good point about staying out of shipping lanes with small boats. I've had first-hand experience.
I'm grateful for you helpfully adding the "3 football fields" conversion into actually understandable units (400 meters), but, what the hell is the length of a London bus? How much is 23 of those things in meters? Please ellaborate.
Awesome video Mike
@01:02 There is a documentary where aliens invade the earth and it's up to the US Navy to defend the world; I suggest the viewers watch it to see how ships can turn and stop very quickly
lol funny
12:00 that's why small boat owners learn the most important rule of way: Under normal circumstances, the more agile vessel has to give way.
It works in traffic too. Physics says "Let the Wookie" win. 😂😂😂
But with boats, it's atually the regulation :)@@atrifle8364
Bigger vehicle has right of way. A large ship might not even see a small boat. And might not even know it hit it. Imagine a giant ship like the titanic plowing into a bass boat. It would be like hitting a cat with a semi truck.
@@gregrowe1168That's no contradiction. The smaller vessels are normally the more agile which have to give way. Only exception is when sails are involved, as ships with no engine are considered less agile. But in this case ... if you put up a sail boat, even a large one, against a container freighter, the sail boat ends up to be more agile.
Interestingly, that isn't true in road traffic; with road user substituted for vessel, of course. Not at least from legislative perspective. Maybe that's because vehicles can usually stop unlike vessels. Apropos, my reply to the title question: they are drydocked. All watercraft, except bottomed submarines, have to be drydocked to make them stand still.
Agree Murdoch gave command to STOP engines not REVERSE. Passengers reported no shaking or vibration which would have occurred if screws were reversed at 21knots. Titanic coasted into the iceberg.
Plus, reversing the engines would have made it impossible to steer.
you think after all the trauma of being freezing cold and put into lifeboats, and having your trip runied, they would remember a bit of vibration? Not likely.
@@Astronist So would an all-stop. When cruising, and especially as lower spees, the local velocity of water imparted by the props substantially higher than the hull velocity. Therefore ordering all engines stop considerably reduces rudder effectiveness. Assuming the officer wanted to port around the berg, it would have been better to keep the engines at ahead, and not stop or reverse.
😂@@keithammleter3824
Love the video keep up the good work
Good show, thanks
Wonderful video!❤❤❤
Great episode Mr Brady
Another great video Mike, thanks. What effect, if any has the application of azipods had on modern shipping with regard to stopping and maundering?
I served aboard the US carrier, USS Nimitz back in the 90s and when we were fully loaded out with bombs, beans and bullets as they say, it would could take as much as two miles to bring the 110,000 ton ship to a full emergency stop from max speed (appx: 33 knts)!
a quick wiki shows the carrier has 194Mw of power.
Very informative.
Paddle steamers can stop really quickly. It's their very nature. The floats act exactly like the ship brake, only one that works really well.
By chance I was looking at the Talisman's bell today. She was an LNER paddle steamer of 1935 that had an electric motor (GEC?) with a paddle wheel on each end; direct drive, no gearing. The Talisman was especially good at stopping. She could stop in about 2 lengths. I think she was 230 feet long. The strain on the motor must have been immense but it worked perfectly. The strain on the generator sets was another matter.
The wheels were rimless with 8 steel, later wooden floats. The steel ones caused the wheels to fracture but the wooden ones had more give and were far less harsh. I believe they were Canadian Rock Elm. The Waverley uses Opepe now.
Full details are in Talisman, the Solitary Crusader, by Alan Brown, but I don't have the book to hand just now so I'm going from memory.