What Is a Bulbous Bow?
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- Опубликовано: 3 июн 2024
- Have you ever wondered what that protruding structure at the front of a ship is for? Well, that's the bulbous bow! And no... We’re not being suggestive. A bulbous bow is a bulb-like extension at the front of a ship's hull that helps to improve its hydrodynamic efficiency. By reducing drag and increasing fuel efficiency, the bulbous bow plays a crucial role in enhancing a ship's performance in the water. Ready to set sail on a journey of discovery? The bulbous bow beckons with a promise of both form and function!
00:00 - INTRO
00:54 - Ship Design
02:46 - Warships and Rams
04:05 - How Ships Move Through Water
04:38 - Bulbous Bow
05:46 - Early Bulbous Bows
07:04 - Environmental Impact of the Bulbous Bow
09:00 - 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!
#bulbousbow #shipdesign #navalarchitecture #maritimeengineering #shipbuilding #oceantechnology #seacraft #navalengineering #marineinnovation #explorethesea #shipscience #bowdesign #shipperformance #hydrodynamics #navaltechnology #vesselarchitecture #seavessels #oceanexploration #marineengineering #underwaterstructures 
Развлечения
You may be surprised to learn that the bulbous bow's SECRET second use is actually as a captain's balcony, as Queen Mary 2's skipper Capt. Kevin Oprey demonstrated for a photo shoot (something, I hear on good authority, that he got in some trouble for doing!) ruclips.net/video/41_iAWaG8YA/видео.html
The concept of an adjustable bow bulb actually has a bit of history in and of itself. Robert S. Boston filed a United States patent in 1967 on behalf of himself and David J. Seymour. Patent US3540400A was approved in 1970 and describes an adjustable bulb through the use of hydraulic power. Whether this was ever fitted to a ship for testing is something I'm still trying to research.
You could do what Jacques Cousteau did with Calypso and make a bulbous bow view port. Calypso is an interesting story, you may want to cover her someday.
It gives new thought to ancient Triremes. Maybe our ancestors new both uses?
Could you make a documentary about the wilhelm gustloff?
@@Tarry_Plaguerthe channel Calum has an excellent video covering that ship
I am 82 years old and didn't start looking at You-Tube videos until I retired 4 years ago. I stumbled on to this channel only recently. I really enjoy it.. For some reason, I feel like I recognize the narrator, which doesn't make any sense. Anyway, I look forward to his new videos.
Of course you recognize him, that's our friend Mike Brady from Ocean Liner Designs. ;)
I'm a little bit younger than yourself, but there's definitely something recognizable about Mr Brady's speech and demeanor. He almost has the mid Atlantic "announcer" accent that we grew up hearing everywhere. (Not quite like Cary Grant but along that line) Or maybe it's just because he wears a shirt and tie, looks and acts like the professional he is. We don't see many people like that these days so when we do it seems like something we should be able to associate with a memory. I dunno, I'm just guessing. :)
Welcome to the club! Plenty of fantastic content out there. It’s not just cat and dancing clips.👍
He is also the son of musical superstar, Mike Brady. Best channel around!@@oldsguy354
You are probably right. He is more professional than most.@@oldsguy354
@@kallekas8551 Funny cat videos do serve a vital purpose though. At least for me.🤣
Welcome to you, Sir. There's lots of fantastic videos on here of steam engines etc as well. I'm 36 years old and my Grandad always loved steam engines and ships. It reminds me of him sometimes and I forget he is no longer with us. Hope you have a nice weekend.
It’s funny how we stumbled into realizing how effective and beneficial they are for maritime sailing not from centuries of research and development but simply because navies wanted to ram into other ships
Ram strat best strat.
Many of the greatest inventions throughout history have been created accidently/unintentionally.
Just one more reason to love the military.
Ramming speed!
The Greek triremes already had that figured out! 😊
The bulbous bow is so counterintuitive looking that it's actually hard to believe that it *increases* efficiency versus the knife edge bow.
I agree! It is definitely very ugly in my eyes. Hey, but if it works, then it is what it is
Similar to submarines nowadays, more efficient with a bulbous bow rather than the older knifelike bow. Look at the USS Triton, an early nuke sub designed with a very sharp bow for speed to keep up with the surface fleet. But modern subs having rounded bows can be even faster.
It has to be pointy. Pointy is scary.
The bulbous bow, that’s what I call my doodle.
And 'bulbous protuberance' sounds so very un-hydrodynamic!
Understand the bow also creates a perfect playground for dolphins. They seem to love to ride the wave and can get a "kick" through the water with little energy expended.
Any ship's bow wake is a dolphin playground, but this looks like it's even more fun !
fun fact if you have ever seen dolphins swim infront of a bulbous bow and you wanna know why its because the bulbous bow creates a low pressure zone infront of the ship and it makes the dolphins go faster and swim easier
Good to know that dolphins can also appreciate our shipbuilding skills
Hmmm, when dolphins first encountered the new design, they were probably like, "It's about time the humans figured this out. Our snouts evolved into this concept shape a long time ago." lol.
I came here to say this as well. Dolphins are living their best lives riding the underwater wave created by the bow.
Also the original idea for the bulbous bow came from studying dolphins and how their nose helped them break thru the water to swim at high speeds.
Any boat. With no bulbous bow they surf the bow wave. They do it with sailboats all the time and those have classic hull forms. It saves them energy and it looks like it's fun, plus most boat owners get excited and occasionally remember some leftover fish to give them. Or a dog falls in. People like surfing. Dolphins too.
@@user-lv7ph7hs7lAfter recently going sailing in a catamaran off the southwest coast of Mexico, this. The dolphins want to play, and the people just want to encourage them. Gladly. Because there's something kind of wonderful about dangling your feet a few feet above the water, and having another form of intelligent life jumping up to greet you, and see if you want to share your tuna tostadas. Yeah, Mr Spotted Dolphin splashing my feet, I'll let you mooch my dinner.
Looks like the ship got a bit excited.
between that and talk about shrinking the size due to performance conditions....well glad I'm not the only one whose thoughts went there...which is even weirder when you consider ships are called she ( Edit...right, no more youtube time for bed )
@@livethefuture2492feel free to give an example with your critique
@@livethefuture2492Who are you, the joke police? 🤦♂️
@@esteban1487how about “maybe you should have that looked at?” I’d be a bit concerned looking down and seeing something like that.
@@MrGoesBoomNowadays, being a ‘she’ doesn’t exclude a ‘her’ from having ‘he’ parts. I think that indicates therapy is needed, but that’s the world we live in.
There’s another channel called, Casual Navigator, it’s a great channel that tells the science behind these topics, but Mike tell the HISTORY. Love it!!
Casual Navigation*
0:14 Glad you called it a 'protrusion', I'd have called it something else with that image XD
I was hoping the top comment would be something along this line. Was not disappointed.
🤣
Chode
Like an errection?
first thing that came to mind was "Red Rocket" XD
Didn't know ships could have the infamous Habsburg jaw too.
Hah! exactly 😂
Seeing a new video on my lunch break is so satisfying
I'm just watching it after Arrival at Home from Work.
I wish it was another update on Grand Voyage.
Same :)
An added benefit of your ship wearing a strap on is that it also increases buoyancy of the bow. If you ever watch an Iowa class BB in heavy weather crashing through the waves, they don't have a lot of reserve buoyancy in the bow with their very small bulbous bow. A far larger bulb would add more buoyancy back.
"Ship wearing a strap on" is an image that I won't be able to get out of my head for a while! Thank you for that!🤣
Salty Balls talking about strap-ons is kinda funny in itself. 😂
Ship is just happy to see us.
Thank you for this, I always wondered which ship designer was the first to look at a ship's bow and decide that it needed a codpiece!
Kind of had to be an American didn't it
Your word choice is absolutely _hysterical._
As a newer subscriber, I really enjoy your content. I have some sort of phobia of open ocean so your attention to detail is fascinating and you've reassured me that today's ocean travel is considerably safer than a century ago.
Cheers from Annapolis!
Ironic that you're from Annapolis. 😉
@@skyden24195And that my father was a Naval Academy graduate! I love the ships but like keeping land in sight. 😊
@@DoctorCheryl I feel you. I like boats and the beach and even swimming (which I am an excellent swimmer,) but I am terrified of being in the ocean.
Ah yes, another treat from our friend Mike
When one is on a ship I think it would be a bit rude to ask to see the bulbous bow so thank you Mike for shedding some light on it for us. I always wondered why they were there!
There is a caveat or two for them: 1) a bow design works for 1 hull size + shape at 1 speed.
2) on a smaller boat, like a motor yacht under 100 feet in length, they actually work as a stabilizer and slow down the pitching of the yacht. ( the fin stabilizers slow down the rolling not the pitching )
I remember reading somewhere that they reduced the speed of container ships to save fuel but it ended up causing issues because the bow balance was then off.
I feel like you read my mind, I was just searching your channel history for a video on bulbous bows and was sad when there was not one. Then today I wake up to this. Its a good day.
X2, i was looking some weeks ago if he had any videos about the bulbous bow.
Thanks, Mike. You've answered a question I've had for over fifty years, from the time I was a youngster and became fascinated with the battle ships in the Spanish American War, which had inverted bows. Thanks again, your friend Rocco Liuzzi .
Hey, thats my friend, Mike Brady from Oceanliner Designs. It's a great day whenever he uploads. Great work as always!
Best explanation of how it actually works that I have heard yet. Thanks Mike 👍
Hey, for a physicist, this is one of my favorite of your videos. Anyway, i find them all interesting.
Mike, I’ve wondered how these designs came about - thank you.
By the way, I quite like your new intro
I always thought the bulbous bow is there to protect the hull if the ship crashes into something lol
THANK YOU MIKE FOR ALL THE WONDERFUL INTELLIGENT VIDEOS YOU PUT OUT.
Looks like a giant codpiece... Thanks for this video as it answered a question of mine I have wondered about for years.
Being able to retract the bulbous bow was a great idea! With airplanes, you use flaps to increase the surface of the wings to produce more lift. It allows you to fly at a lower speed but it also produces more drag, so the pilots can just retract the flaps when they don't need them anymore. Every large, fast ship should have retractable bulbous bows!
Just want to say I absolutely love the new intro!
Nice video friend Mike Brady. I had always wondered about that.
Also, I like Pina Coladas and getting caught in the rain, and the feel of the ocean and the taste of champagne.
Makes me wonder what other discoveries we’ll find in efficiencies in design once we start pushing into space travel.
What is a bulbous bow? Bloody clever, that's what! They do look like a ship-sized cod-piece, but you can't deny their efficacy. Some version of the tubercles on whale fins, which allow for more 'lift' but with less drag, will find their way onto rudders and stabilisers I think.
My friend Mike Brady, I look forward to each video you release. Please never stop making videos and I love this content! Thanks for always teaching me something!
This is not unlike phase cancellation in sound waves. Thank you. I learned something today.
Well done. Nice Rupert Holmes reference at the end 🥂
Always happy with my friend Mike Brady from Oceanliner Designs uploads a new video.
I never knew, with all my years working on cruise ships, how the weird bulbous bow worked. Once again, you've enlightened me!
I must say that the intro audio (and video) is great! the combo of the higher string instrument sounds with the super low horn is such a great contrast and I always get goosebumps!
so confident when you speak. staring straight thru that camerca and into my soul. cannot be taught
Thanks Mike. I grew up on a freight ship in Europe in the 70s so all this maritime stuff is just bliss. No I’m not involved in nautical stuff but I am an engineer. I do however miss hiring Halverson boats on the Hawkesbury years ago!Thanks again for the wonderful content.
Good explanation. The inverted bow at 8.13 (celebrity edge) won't take more waves over the bow. Quite the reverse. The shape greatly reduces pitching and remains drier. Traditional ships with their wide flared bows generate a lot of lift from approaching waves and this lift initiates the unwanted pitch-drop-pitch-slam cycle. Remove the lift and you get less slamming. Efficiency still matters so many of these newer axe/x/knife/inverted bow designs still include a bulbous shape below the water line. As such I imagine this one does also.
I strongly dislike the appearance of the inverted bow, just one of many ways the Celebrity Edge is a hideous ship
Thank you Mr. Brady for your great work and dedication.
This is very much like "tuned exhaust" pipes on racing cars. The exhaust gasses travel in pulses created when the exhaust valve opens, and when each pulse reaches the air at the end of the pipe, it over-expands, which creates a low pressure zone around the end. This means a negative pressure pulse travels back up the pipe to the engine. If you time it just right, the negative pulse reaches the exhaust valve just as it's releasing a new pulse of gas. This helps "scavenge the cylinder" to a greater extent, which, in turn, leaves more room in the cylinder for the new fuel/air charge. As you can probably guess, this only happens at a very narrow range of engine speed, so the pipes are "tuned" to be most effective at the power-peak of the engine, just like the bulbous bow.
I know no one would ever build one but I would enjoy seeing a naval architect and a weapons expert redesign an Iowa class battleship using modern hull technology and powerplants. The hull would have to be capable of transiting the Panama Canal. The ship would be used for shore bombardment, refueling and rearming helicopters and VTOL aircraft used for close air support. Keeping the forward 16in. turrets and 5in. turrets would provide for shore bombardment, removing the aft 16in. turret would allow the aircraft facilities to be installed. A ship capable of these tasks would help alot of US Marines sleep better at night. And before you ask I'm an USAF veteran.
I'm sure many others have said it before but i love the new intro! gives me goosebumps every time! Keep up the great work :)
I appreciate that you’ve already ceased the terrible habit that some RUclipsrs have of putting sound effects on when a graphic is displayed on screen.
It’s distracting, annoying, and not necessarily since you have intelligent interesting content anyway.
So thanks for that.
Totally agree. I really hate that "whoosh" noise so many RUclipsrs use!
@@canuckprogressive.3435 wow thank goodness, someone who thinks the same as me.
@@RichieW90210We seem to be few.
When you began describing the bulbous bow I immediately thought of the gallery's of ancient Greece. They a bow designed for ramming other vessels but wondered if their speed was augmented by this long bow.
I took a shot every time he said bulbous bow. Now my liver is dead.
Great video! I would love to see another video about the "inverted" bow or straight bow. I see a lot of modern ships having this new shape, especially work ships in the off shore Industry.
I wasn’t expecting a Pina Colada Song reference, but here we are.
Fascinating. I always imagined it was to deal with submerged objects. This makes much more sense.
The first Nimitz Class aircraft carrier with a bulbous bow was CVN 76, the USS Ronald Reagan. That was also the first Nimitz Class carrier to have its island moved slightly aft. The Bush went a bit further aft with CVN 77 and then the Ford Class moved it rearward again.
My Navy ASW Frigate had a big rubber sonar dome, that also served a similar purpose.
Fascinating, nice work Oceanliner Designs.
Maritime engineering has been a favorite subject for many years. Having said that, I have learned so much from your channel.
Your period collar and contrasting shirt are most dapper, Sir!
Its amazing how many top inventions are discovered by accident .
GREAT video Mike! Love learning new tings with your posts.
8:50 the ship would be the only thing on my mind! Quite extraordinary engineering.
From hydrodynamics to acoustic, light, radio or quantum things, waves are always kind of strange. Amazing!
Thank you 👍
Thank you for explaining so succinctly! Destructive interference, how cool!
I was just wondering about this man! Thank you my friend Mike Brady from Oceanliner designs! 😊
Mike, your videos are truly a class act and I have been doing the same thing as you with railroads for years, and do my own film archiving. Since railroads and maritime shipping when hand in hand, I would love to see more content on railroad’s tug and car ferry fleet, that is a lost history that not many know and you could explain the maritime end better than I ever could! Just a suggestion, I tune it every week, your video have been inspiring to get a kit of the RMS Olympic this year! Keep up the absolutely splendid work! - Hunter Lohse “thetrainguy”
Informative, clear presentation, excellent backing videos. As usual. Thank you.
Yet again, another very interesting video topic on something I never thought about before, and in true Mike Brady fashion, information mixed with a fun (in this case song) quip "sipping Pina colada, and getting caught in the rain"... Keep these videos coming!
Video ends: thank you for watching...
Me: Immediately searches inverted bow!
Thanks for another good vid that's sending me down another rabbit hole of knowledge of
This was a perfectly done video. Informative, short enough to keep me watching and Well edited. Good job, worth a sub. 👏🏻
The inverted bow seems to be pretty popular amongst some ships such as ocean exploring ones. The X-Bow is one such famous example and very eye catching.
I am 100% about form following function. So I definitely like these.
Really loving your channel. I like how you dress the part, it makes it extra nice
Years back I worked at a shipyard in Boston. We fabricated and installed bulbus bows for the Knox class frigates. We called them sonar domes. They were clad with a B. F. Goodrich rubber "boot" almost 2" thick. No steel, which allowed the sonar waves to propogate. The compartment behind the rubber was flooded to allow sound transmission and had to be pressurized.
I hate to think of what happens to any marine life near these vessels. The sonar equipment was not to be energized while in port in case any divers nearby in other yards were working.
Unfortunately active sonar use (especially modern sonars) are known to cause huge impact to wildlife, such as causing entire pods of whales to beach.
Thanks for explaining this so well
I Liked Your Video & You Remind Me Of The Actor Who Played Andrew Foyle On, Foyle's War. Thank You.
I remember as a kid thinking it was some sort of rock/ice breaker 😂
An interesting comparison of this for us Oceanliner fans is looking at footage of the Queen Mary at speed and the Normandie at speed. You can clearly see how much smaller the Normandie's bow wave is compared to the Queen Mary which used a traditional bow shape like many ships before.
Thank you for explaining this - I wondered what made it increase hydrodynamic efficiency.
The cheesy-ness of the pina colada line was awesome
Another engineering marvel.... engineering.... ooohh I know - please can we have a video on the ocean liners of Isambard Brunell? PLLLEEEAAASSSEE!
Huh... I hav enjoyed this channel for some time, but this video just made my night! What a fascinating thing that I have been wondering about for some time. Oh, and charming video end too :)
Awesome vid mate! Would you consider making a documentary style video about the history of ship propulsion?
Mike, I'm liking the improved production values. Keep it up.
On the reverse bow: as I recall, the efficiency comes in its handling of sea waves. Conventional bows increase bouyancy as water rises (wider bow) and will ift ship more, whereas the reverse bow is less bouyant at higher elevation so the peak of a wave has less impact on ship and won't lift ship up as much. There is also something about how the revrse bow will redicerc the water from the wave's peak just to the side, whereas the conventional bow will "resist" the wave and try to pushig it down and to the sides.
Fabulous information, as always! Thank you for the video!
Shout out to David Taylor! (As a former employee at DTRC!)
Excellent video tutorial
This is something that I have wanted to know about ship design
Thankyou for sharing 👍
I like your stuff Mike!!! You know ships the way I know trains. You do a very nice job on these vids!!!
Love the new opening titles. Always a pleasure watching your videos. So informative and always engaging. Keep it going ❤
I've always wanted to know about this. Thank you.
Wow Mike, this was a great video! Thank you!
YES!!! I've always wondered about this.
Honey, wake up! Our friend Mike Brady posted! All jokes aside this is my favorite channel and aside from listening to it throughout the day I sometimes fall asleep to videos from it cus your voice is so soothing.
Thank you Mike for another very informative video. All the best from Sydney
Thanks Mike
I’d love it if humans considered noise generated when we designed oceangoing vessels.
We do
The latest I've heard is they switch it off when a pod comes near. Navies too unless they can't risk it for some reason.
Great video thanks!
It is interesting how the Bulbous Bow played a part in the Normandie VS Queen Mary competition over the Blue Riband. I assume it provided Normandie with better stability allowing for higher speed without complaints by the passengers while Queen Mary I guess had to be more picky on when to try for the record only at ideal conditions and prepped it's passengers for the discomfort of rougher sailing perhaps?
Amazing! Thanks for making me smarter, as I always wondered how such avow would work!
Oh jeeze, the closing joke made me groan! 😃
Great video with excellent information
Excellent content as usual. Keep up the good work!
When I saw the thumbnail, I immediately thought of the panta rhei, where I first noticed the bulbous bow. I was all the more surprised to see the ship in the actual video :D 6:16
It's a beautiful ship, but it can't compete with the 110-year-old paddle steamer Wädenswil, which also still sails around Lake Zurich regularity.
Die Panta Rhei ist zwar ein schönes Schiff (damit stehe ich oft allein), kann aber mit den Raddampfern wirklich nicht mithalten. Ich habe sie leider ewig nicht mehr in Aktion gesehen, bin auch kaum am Zürichsee...