Bulbous Bow - The History and Science

[@ichasegaming]

Another video discussing another interesting part of a ship :D Enjoy everybody. Sorry it takes a while for one of these videos to drop, takes a while to do some of the extra research and turn it into something watchable :)

[@MjolnirOmega]

Great video!

[@alexnevarez5024]

next class should be propulsion, or machinery I suggest Carlton for propulsion, and for machinery I haven't read any english book, only spanish

[@Mthammere2010]

You wouldn't want to retrofit a bolbus bow to ships that are supposed to be ASW capable is that: 1) it most likely would reduce sonar performance at all speeds and 2) ASW ships need to be efficient at low ASW speeds. Not a naval architect just an ordinary dude.

[@jimfeitz1291]

I really injoyed this. It was very interesting keep up these videos.

[@ichasegaming]

Thanks, will do :)

[@sankyu3950]

Im also interested to learn about ships hull with other having a V line hull and other having a flatter hull, most interested is the shaping that goes under the water hull of ships

[@taylorgozzo935]

Naval Architect here The reason for the V line hull is for speed. Those vessels can get partially or fully up on a plane, like a ski-boat. Those hulls are therefore known as planing or semi-planing hulls. The larger ships, like battle ships have what is call a displacement hull. Rather than riding on top of the water, they just push through. And that is why the flat bottom exists. There is just no reason to have it shaped in a complex way because it won’t be above water ever, or interacting with the waters surface. In addition, the more flat panels on a ship, the easier they are to design and build. And trust me, with a ship as large as a battleship, you need to take advantage of every simplifying technique you can, especially in the 1900s. Hope this helps!

[@sankyu3950]

@@taylorgozzo935 i know that im late but thank you very much on this

[@sergarlantyrell7847]

At speeds significantly above or below the design speed for a particular bulbous bow, the destructive interference effect doesn't work, and can have the opposite effect when in-phase with the bow wave (rather than 180 degrees out) making the bow wave bigger and causing more drag.

[@templofzoom9635]

Liking these videos, high performance engineering and games interacts on my personal Venn.

[@ichasegaming]

I'm loving the design and engineering aspect more and more. The game itself is mostly flavourless now lol

[@coffeefootcarey]

I just want to say how much information is in every one of your videos I've watched . Amazing job you are doing. May I humbly make a comment ? As much knowledge as you obviously have on your fingertips, I cannot believe you have not run across the expressions, Bow(Front), Stern(Back/Rear), Starboard(Right Side), Port(Left Side). Amidships (Middle or Dead Center(as in Rudder position). You get the picture, I'm sure.

[@em1osmurf]

TIL something i wasn't even taught in US Naval officer's Engineering course (1972). a simple 10 minute dive into fluid dynamics. thank you!

[@alexnevarez5024]

I got a whole semester of this, and 4 books (Newman, White, PNA, Carlton, and got slept in Savitsky classnotes), but teachers just don't have the skill to transmit the message that easy.

[@welshpete12]

Some years ago I was in Denmark . I was taken round a preserved war ship from about the 1880's . Sorry I do not remember the name of the ship, but it wasn't very big. It had a bulbus bow . The impression I got it was to ram other ships .

[@JafuetTheSame]

Your impression was definitely right. After battle of Lissa in 1866, to ram the enemy was seen as viable tactic up until 1910s. Thats why warships had these protruding bow shapes but the commercial vessels did not. These were reinforced chunks of steel intended to make a hole into enemies hull. Mikasa's bow is good example. (and btw I think that french actually discovered by 1890s that it has some nautical properties as well)... I think that iChase should have mention this.

[@matteomazzei1724]

Very very interesting series. Looking forward for more of these videos. Honestly I'm particularly curious about the hole history of DDs especially the French design wich saw Destroyers reaching speeds of up to 45kts, more then 83km/h and 51mph respectively!

[@tspencer227]

Great video! So, USS Ronald Reagan (CVN-76) was the first aircraft carrier fitted with a bulbous bow, and it supposedly gave us a bit more top end over other Nimitz-class ships. Additionally, earlier ships in the class had a tendency of the bow to "dig in" at high speeds in rough seas- not something that's desirable during flight ops- and the new bow was supposed to help correct that.

[@ichasegaming]

Yeah, some of the advantages of the bulbous bow include reducing trim angle by almost 1 degree and reducing pitching motion significantly, the latter of which is very helpful for CVs. Thanks for sharing :D

[@MrHydenSeek]

Keep them coming this was a bit interesting. The U.S. Navy has been eyeballing a new DD with the design based from the Burke -class. They may just be holding out for that, something about a bigger magazine and a higher watt capacity. ( hypersonics & railguns ). I spent time on the Arleigh Burke herself when she was new. God I feel old now.

[@ichasegaming]

Thanks, will keep making content on stuff that I think is interesting. Not sure what they'll do for next gen DD though. The Zumwalts were kind of a mess in some ways.

[@armanhadi777]

Much appreciation from community for making such informative videos(especially from those who have interest in 🚢 beyond the game). Please continue this series, calling out design features that intrigue you and call out realism or lack thereof as you did in the previous video. I know it is an arcade game, but still it surely appeals to a wider audience. Thanks again for your videos.

[@ichasegaming]

Definitely, I will keep at it. Slowly but surely I'll cover most of the major topics...I hope XD

[@lightspeedvictory]

So how do bulbous bows combined with stern flaps increase the fuel economy/operational range of ships? Also, can we get a video on the different wave piercing bow forms and how they function (such as the difference between a hurricane bow, and other wave piercers such as knife and axe shapes)?

[@Texas240]

The "negative" effects of a bulbous bow at speeds slow enough as to not benefit from the wave cancelation effect aren't really all that negative because fuel use is not linear. The extra drag at low speed doesn't impact fuel economy nearly as much as the wave effect improves fuel economy at higher speeds (or, more correctly, at the higher speed for which the bow is specifically designed to provide the wave cancelation effect).

[@aurelian3268]

absolutely love this series. keep it up

[@ichasegaming]

will do :)

[@johnnyenglish583]

Love these videos, keep'em coming!

[@ichasegaming]

Cheers, will do :)

[@tsuaririndoku]

Drachinifel: Could this be one of my people

[@iqmalaidil3414]

Thank you, SeaChieftain! Really enjoyed it. Please make more of these.

[@ichasegaming]

You got it!

[@typezero_archange1593]

Eyyy!!! Chase Actually Featured the Bulbous Bow of the Yamato Class!! . The Yamato's Bulbous Bow was one of the Unsung Engineering Marvel during It's time. Mostly because Japan was "The Enemy" that time so everybody was not looking at the Yamato Class with Interest.... . I Suggest you make a Vid on how Turtle-back Armour Scheme Works next vid... :3

[@jaywerner8415]

Huh, so thats why they have those bulges on the front, NEAT!

[@ichasegaming]

Yup, also why some ships would have them and some don't

[@RickMentore]

History of the Bulbus Bow was fascinating. I wounder what effect bulbus bow may have on a small (40ft) sail yacht while under sail?

[@pitdoctor]

I chuckled a little seeing one of the cruise ships from the company my wife works for used in the video.

[@ichasegaming]

Oh, which one? The Holland America one?

[@pitdoctor]

@@ichasegaming Yeah, she works in the main office for Holland America.

[@ichasegaming]

That's awesome :D I love Holland America, took Noordam to Alaska a while ago and was the best cruise experience I've had so far.

[@pitdoctor]

I've been lucky enough to take a lot of Holland America cruises over the years. Living in Seattle makes the Alaska cruises super convenient.

[@ganeshgs2241]

Superb explanation sir! Thank you very much sir!

[@kurumi394]

That thumbnail reminds me My German friend asked me why Japan has a Yamato museum with a scale model of the Yamato I asked him why not and he said "The world's probably gonna bitch about it for the rest of time if we build a Bismarck museum or smth, so why do they get a pass" Either he was pissed that Japan gets a pass or Germany doesn't

[@firestorm165]

That's a good point actually. Why wouldn't Germany get a pass?

[@Joisey11]

Japan has no war guilt. Period. Look how idolized the IJN is in anime and games in Japan. Study the lyrics to Akino's Color of the Sea. They are militantly unapologetic.

[@kurumi394]

@@Joisey11 I think it also comes down to how modern Germany and Japan views their older selves. Germany views Nazi Germany as an evil past self that they do not want to be perceived as being equal to. So the world can bitch about Nazi Germany and they're fine. Meanwhile Japan embraces Imperial Japan as part of their history, and don't want anyone criticizing it, as they see it as attacking modern Japan as well, not just Imperial Japan.

[@DarthPeachy]

Great video ichase. Ive quit playing warships for good but I'd be very happy to see more of this type of content from you.

[@ichasegaming]

Yeah, I'm pretty tired of warships the game too, but the design and engineering is fascinating :D so this is where the content is going

[@Stoicswimfish]

Saw the thumbnail in the feed, had to mention that the whole museum is worth a visit.

[@theironlukeve5544]

Which museum is it?

[@Stoicswimfish]

@@theironlukeve5544 Kure Maritime Museum in Kure City, Hiroshima prefecture. That Yamato model is a 1:100 scale model, absolutely mind boggling huge.

[@theironlukeve5544]

@@Stoicswimfish Awesome! thanks for the info, if i happen to find myself in Japan I'll get there

[@charlescdt6509]

Awesome vid, keep up the good work.

[@ichasegaming]

Thanks, will do!

[@IsKor06]

Really enjoyable video iChase, please continue this series! Awesome work, thanks again for all this.

[@ichasegaming]

Glad you enjoy it! more coming :)

[@0815CrossLight]

Well done chase! I'm no expert on the matter, but I do enjoy this format a lot. Cheers!

[@greggaminger]

Really interesting, thanks for posting this.

[@ichasegaming]

Cheers :)

[@Dcarp7]

This is very interesting seeing the examples of these ships in World of Warships as they would've looked like in real life. It is also interesting that Kremlin's design does not use the bulbous bow approach like Soyuz. Then again, that is where reality and history tend to take a back seat in World of Warships, especially with Kremlin's design being the combination of two other designs of Kremlin.

[@viktor9461]

Visited the yamato museum, was moving to see a section of the museum with the yamato sailors belongings, a lot of artifact and even some last will. I could not take any picture since its a forbiden picture zone. Going to go back to visit next time i visit japan

[@niko5015]

Very oldschool and classic ichase contet! Really enjoyed it

[@ichasegaming]

Much appreciated! Thanks for watching ^_^

[@andreasmuller4666]

I´m almost tempted to ask for one on prop guards and paravanes just to have the "ultimate" reference whenever the question for one of those two pops up on reddit yet again.

[@JafuetTheSame]

I think it would be worth mentioning that people shouldnt mistake late 1800s-1910s warships ram bows with bulbous bows.

[@trapicecreamy6871]

Hey iChase. I just learned about paravane chains and their use in american german etc warships. would be neat to do a video about them as well.

[@MohammadRashadyandere-sama]

REALLY THANK YOU iChase for this nice and amazing vids

[@ichasegaming]

You're welcome ^_^

[@jonsouth1545]

What would be intresting is if you could make the bulbous bow out of a semi-rigid compound and adjust the shape of it to compensate for different wave patterns and thus get rid of its major issue. Creating some kind of adaptive bulb

[@ichasegaming]

Neat idea, but not 100% sure how to implement it considering limits to material science, cost and also if the material is strong enough to deal with mother nature (ocean waves etc)

[@jonsouth1545]

@@ichasegaming a lot of those issues could be solved by using a water filled rubberised material as water cannot be compressed. By subdividing the rubberised material into different parts each could be filled or drained of water thus changing the shape you would not be able to do all wave forms but you could have the bow change shape between the most common wave forms.

[@Tuning3434]

@@jonsouth1545 True, but you still need a very rigid and still at the same time a very flexible rubberlike bulb. That incompressible water is still a fluid and doesn't hold shape. Pressurizing the water might help a bit, but you still need the stiffness of the rubber membrane to create and maintain the shape. TDL the incompressible water helps, but doesn't solve the issues at hand by itself.

[@jonsouth1545]

@@Tuning3434 it would be a complicated system I was was thinking a rubber like bulb made up of lots of smaller rubber like bulbs with a basic internal frame thus giving it a lot more internal strength and rigidity while still being flexible enough to change shape. I was thinking a material not to dissimilar to what the RHIBS are made from are made from. Thier is also no reason why such a device couldnt be a modular attachment to an existing bow and thus be replaceable meaning it wouldn't strictly need to have as long a life as the main hull.

[@Tuning3434]

@@jonsouth1545 Well, complicated geometry and lots of rubber might end up in a construction that is heavier then when constructed in only steel, especially if it relies on being filled up with water. Again, I am not saying it's impossible, but I would be interested in what mass you end up running some simplified numbers. Ribs make a very nice usage of what are essentially inflated balloons. As long as they are pressurized, the 'relative' lightweight shell has excellent rigidity as its material is only loaded in a shell load. This makes this structure very lightweight, just like how a cylindrical pressure vessel is relative light. It is what allows aluminium planes to be a thing. However, you can't deviate to much from this perfect shell geometry without needing to add severe reinforcement structures. TDL: you can probably make a rubber bulge, but to make it able to allow different shapes optimized for different flow regimes would be the real challenge to solve as you probably cannot rely on the optimal loading geometry of a shell / membrane structure.

[@alexnevarez5024]

yes, keep doing this

[@kopfauftischhau216]

I really enjoy this kind of video, they are easy understand and really interesting.

[@ichasegaming]

Thanks :) glad you enjoyed it!

[@social3ngin33rin]

@8:10 ......Queen Mary is....packing enough heat to be King Mary >_>

[@bullreeves1109]

I'm liking this new series. Keep em up!

[@ichasegaming]

definitely, they won't drop super fast but they will drop

[@cozduntow9346]

The Yamato Museum, went there a few months ago

[@arnoedgar8477]

Very interesting lecture! Keep it coming!

[@Zorglub1966]

Very interesting. Thank you for sharing. And happy new year!

[@ichasegaming]

Happy new year!! and thank you for watching

[@gn_ghost4757]

very informative. Thank you!

[@ichasegaming]

Glad you enjoyed it! Cheers

[@brianberthold3118]

the work desk could have been such a nice port to use if it had better lighting

[@gordslater]

A squid eating dough in a polyethylene bag is fast and bulbous. Got me?

[@alexlupsor5484]

Good afternoon. I’m a fan of the HMS Nelson class battleships. If a bulbous bow was attached to the bow of theses bruisers, would they increase their flank speeds by say three knots they would then become a fast speed bb. I assume this as their flank speeds were 24-26 knots, with the bible an increase of 3knots would put them in the range of the KJV and thus be able to escort carriers and thus be more effective in the closing of the pacific theatre of the war.

[@barryurg3134]

well done. I assume the next episode will be about sterns.

[@DarkStarPast]

These Navel architecture videos are great, can you do some about WOWs Sigma values and Dispersion, example, how an increase in range effects listed dispersion, thanks

[@RAiNfORAiNbOW]

Dispersion stays the same with range increase at a given range and increases linearly from 4km until max with range mod

[@DarkStarPast]

@@RAiNfORAiNbOW thanks but there more to the question than only that, alot more

[@RAiNfORAiNbOW]

@@DarkStarPast what more do you need to know I know how it works

[@judiciasxaegis]

I too, love my capital ships frontally thicc

[@mignonallen5964]

Very interesting. Thank you.

[@AODRHINO]

I wonder if it would be feasible to have a bulbous bow that can change shape through inflation of some sort or change position above the water line at low speeds when necessary

[@popefang]

Very interesting and thankyou!

[@mikehenthorn1778]

Sweet video sir thank you

[@fiterwer]

I really like this kind of video! please make us more video like this

[@ichasegaming]

Definitely :) much more along this line coming

[@vsukr]

Hmm... So why not have something that hydraulicly drops from the overhanging front part of the ship when the speed increases.

[@Nitryl44]

Whales and submarines struggle to detect commercial ships because of their huge bulb.

[@Ozark-nq9uu]

Great video, very interesting!

[@ichasegaming]

Thank you for watching :)

[@sparcle3839]

prety cool video you explain very well the things

[@ichasegaming]

Cheers :) thanks for watching

[@RobbertLobik]

Awesome vid! although it does make me reflect on past life choices.. These engineering topics are so cool!

[@ichasegaming]

Glad you enjoyed it. The more I learn the more I regret some past choices as well. The more I learn the more I see interconnection with everything else in the world

[@alexnevarez5024]

@@ichasegaming it is not late. it never is! We would be honoured if you join us.

[@ichasegaming]

I'm certainly trying :) maybe run into you in the field one day

[@tokencivilian8507]

What are the structural impacts of adding that extra bouyancy at the end of the ship?

[@SgtBeltfed]

Generally speaking, it's beneficial and reduces stress. Ships are more buoyant amidships than they are at the extreme bow or stern, especially with high speed ships. The Bulbous Bow just reduces the load from the bow hanging from the amidships section. If the bulbous bow is an add on to an existing ship, the extra weight of structure will largely offset the additional buoyancy. On a new design, it will allow more weight to be carried forward.

[@social3ngin33rin]

@8:10 They mean King Mary?

[@stevenwiederholt7000]

OH OH! I May Have Learned something.

[@ichasegaming]

Nice! that's the goal :D who knows at the end of it all, people who've watched all of it would be like half a naval architect lol

[@stevenwiederholt7000]

@@ichasegaming Well I'm 1/2 of Something. What that Something Is depends on who you talk to. “The fox knows many things, but the hedgehog knows one big thing.” - ancient Greek parable I'm a Fox. I like to think I know (a little) something about a great many things.

[@jebise1126]

hmmm but often when you see side profile of old ships bow is drawn different. where you get you data and/or was bow secret?

[@alexnevarez5024]

search blueprints, or line plans on internet

[@justinhensley108]

very informative

[@ichasegaming]

Glad you liked it

[@ironrod3597]

Chase. I recently re-started playing WofW and wondered if you had any advise on which nation had the best class BB, cruiser and DD. I'm a free to play player would like to save some time. Thanks! RunningUte

[@RAiNfORAiNbOW]

Are you still playing

[@stuntmasta305]

Much better! I would consider writing before narrating. Some of the wording seems a bit sloppy, overall I liked it.

[@ousou78]

09:12 it looks distusting, like the ship has tumor or something

[@shao1423]

Can’t wait for more videos on warships knowledges. Sadly less and less apply to wows now.

[@ichasegaming]

Yeahh, more and more fantasy in the game. Ah well I'll just teach people naval arch while I'm going lol

[@Verklunkenzwiebel]

is added buoyancy of a bulbous bow a factor?

[@easonzheng2774]

iChase I like you your channel thank you for your teaching class, I am not good at CV RHEIN, can you teach me how to play RHEIN? Thank you.

[@sebastianravn6478]

How to play Colorado I'm struggling

[@xmlthegreat]

Moar ships! *MOAR* !

[@ichasegaming]

Way more! :D

[@28ebdh3udnav]

New channel huh.... Well, let me help you out, *I subbed*

[@ichasegaming]

Thank you and welcome :D

[@jackcasse]

Closed caption translated to "bulbous bowel", hur hur.

[@mowen0yuriko]

Referring to ships in the feminine gender is more difficult when they are fitted with a large bulbous bow.

[@DJpiya1]

Good video, thanks, however it is 28knots, not 27knots.

[@NoFramesPerSecond3924]

Oh nooooooo he will be gone for months again what is that upload schedule?! Please COME BACK!!!!!

[@Leptospirosi]

This thing www.seaforces.org/marint/Italian-Navy/Patrol-Vessel/Thaon-di-Revel-class.htm immediately comes to mind: shoulbe working both at low ad high speed at max efficiency🤔

[@ichasegaming]

Yeah this bow design is one I'm not sure about, will keep investigating and maybe be a topic of a future video :)

[@Deevo037]

Interesting you should mention HMS Hood, if you check this rather detailed and well thought out analysts of her sinking you could almost suspect the hydro dynamic effect of a more pronounced bulbous bow, like the Yamato, may well have saved her. kzbin.info/www/bejne/eX2zlnZtgbekf7s

[@albay543]

I see yamato, i click

[@ddjohnstonbetween2brests639]

How did you learn this stuff? Did you study something like shipbuilding or is it a hobby?

[@papatango2362]

1st like

[@ichasegaming]

🎉 thanks

[@CJ_Welch]

Hi

[@ichasegaming]

Hi

[@CJ_Welch]

@@ichasegaming I really like your videos, very informative. Keep up the good work.

[@ichasegaming]

Cheers :)

[@davidjamgochian]

IF OR IF NOT , HELLO 👋

[@dogthatlooksattaxevaders6325]

*Congratulations you now have a Diploma in Ship Engineering*

[@user-pv4hx8hs3f]

Britain was doing this for years before the US or Japan.

[@model-man7802]

Are you Ronnie's son?

[@ichasegaming]

Nope, who's Ronnie?

[@model-man7802]

@@ichasegaming I worked with Ronnie,a good friend at the airlines.His sons name is Chase.You sound remarkably like Chase.Sorry for the mistake.

[@ichasegaming]

oh neat :) unfortunately not