What is the BULBOUS BOW for?

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  • Опубліковано 22 гру 2024

КОМЕНТАРІ • 2,7 тис.

  • @davidjames1068
    @davidjames1068 6 років тому +4054

    The bow wave you want to mitigate will vary depending upon the ships speed, sea state and wind. A fixed bulb can only be optimised for a single condition and in other conditions will actually be harmful. In any case, the mitigation will only be partial at best, so the benefits might be limited. For a vessel almost always travelling at a constant speed this might be acceptable. But for a vessel constantly changing speed and course, example a sailing ship or warship the benefits might simply be too small to justify the costs. For a small yacht the benefit might be very small ( the speed is low, the bow wave very small and the fuel is free and who really cares if sometimes you might go 0.1 knots faster ).
    An ideal bulb would be able to change it's shape to automatically adapt to the conditions, just like aircraft have swing wings. However making a 10?? ton shape shifting bulb might be way beyond practice, although perhaps this would be a good project for a naval design student somewhere.

    • @CasualNavigation
      @CasualNavigation  6 років тому +501

      Thanks David. You are right, it would be a great project for a naval architect student - and I know shipping companies would buy it if it would save fuel!

    • @huss03
      @huss03 6 років тому +91

      I would have thought that a bulb that can be made to move it's position forwards and aft depending on ship speed wouldn't be beyond the limits of engineering. Wouldn't that widen the window of speeds for which the anti-phase wave could be set up?

    • @davidjames1068
      @davidjames1068 6 років тому +61

      Moving the bulb alone, might not be enough to help. It might need to change size/shape as well. The key problem would be if the wider window of speeds gives useful savings at speeds actually commonly used by the ship.

    • @greeneggsandsam2014
      @greeneggsandsam2014 6 років тому +125

      david james As I understand, these bulbous bows are used mainly on large, ocean traversing cargo vessels, which do travel at mostly constant speeds at sea. Their main speed changes happen near land, and not where they spend most of their time moving through the water, the ocean.

    • @matthewhemmings2464
      @matthewhemmings2464 6 років тому +26

      david james you can still try to aim at an optimal condition. The cost is marginal on the scale of large boats being built, and the drag is mostly affected by high speeds, so you can bet that optimizing the bulb for medium-high speeds for bigger ships is a sure way to go.

  • @jakedragsknee
    @jakedragsknee 6 років тому +9758

    I believe it’s for mating reasons with the female ships

    • @johnclayden1670
      @johnclayden1670 6 років тому +649

      all ships are female ...

    • @jakedragsknee
      @jakedragsknee 6 років тому +989

      John Clayden did you just assume all boats gender

    • @ph89787
      @ph89787 6 років тому +382

      John Clayden Not entirely true. The Kaiser wanted some of the German ships to have male pronouns.

    • @Cleptro
      @Cleptro 6 років тому +60

      Jake Fejer All ships are female.

    • @jamesavery6671
      @jamesavery6671 6 років тому +270

      Female's can wear strap on's though...…..

  • @thomasmoser7382
    @thomasmoser7382 5 років тому +482

    i really like these kind of videos, no bullshitting around, informative and in only 4 minutes i know what i wanted to know when i clicked on the video

    • @roonbare2769
      @roonbare2769 3 роки тому +14

      And no annoying background music

    • @airzulu2733
      @airzulu2733 3 роки тому +2

      I found it interesting . Having watched ships and this bulbous bow and not understanding what's its use . And now we know . I liken it to a form of leading edge on an aircraft wing .

  • @Allthingstech3108
    @Allthingstech3108 6 років тому +632

    I am teacher and I can tell you you did a great job, no flashy words but the physics was very clear.Thanks

    • @CasualNavigation
      @CasualNavigation  6 років тому +45

      Thanks Physics_rabbi. I hoped it would would come across clear.

    • @wholeNwon
      @wholeNwon 5 років тому +5

      Don't eschew "flashy words". Learn instead.

    • @RideBikes_Walkplaces
      @RideBikes_Walkplaces 5 років тому +19

      Not an English teacher I presume.

    • @wholeNwon
      @wholeNwon 5 років тому

      @@CasualNavigation Clearly?

    • @chikennuget3634
      @chikennuget3634 5 років тому +3

      wholeNwon when teaching a new concept it’s generally not a good idea to introduce new terms. it’s better to let the students grasp the concept before telling them how to put the concept into words

  • @Ernzt8
    @Ernzt8 3 роки тому +278

    My father, who was a navy man, always told me that this behaviour was found by accident. The first was build for sonar and it created a possitive increase of speed

    • @davidjames1068
      @davidjames1068 2 роки тому +19

      I read somewhere that they discovered this when they put rams on the front of early metal war ships. When a ram fell off, the ship was slower and someone went 'ah-ha!'.

    • @Nibby12
      @Nibby12 2 роки тому +5

      Your Father was right. On Warships they are Sonar domes.

    • @SakuyalzayoiTheMaid
      @SakuyalzayoiTheMaid Рік тому +2

      i immediately started chanting sonar when the video asked what the bulge was for, only now i learned it also on very specific occasions and circumstances helps with the waves.

    • @pizzlerot2730
      @pizzlerot2730 Рік тому +4

      ​@@Nibby12sorry but no. The bulbous bow predates sonar by quite a bit. The reason that it's used for sonar on warships is simply that the location of the bulbous bow is exactly where you'd need to put a forward-sweeping sonar setup, and since they already had that protrusion, they just put it inside of the bulbous bow.

    • @pizzlerot2730
      @pizzlerot2730 Рік тому

      Now you can tell your dad that it's actually the opposite, and he can learn something new 👍

  • @bobconklin7159
    @bobconklin7159 3 роки тому +182

    I was part of the commissioning crew of the USS Ronald Reagan CVN 76. We had tee shirts made that read, “ I’m Not Fat. It’s My Bulbous Bow.”

    • @bollockjohnson3706
      @bollockjohnson3706 3 роки тому +3

      *I* too was on the commissioning crew of the USS Ronald Reagan CVN 76 and I am calling you out on your bovine excrement.

    • @TheGnarlyPigeon
      @TheGnarlyPigeon 3 роки тому +4

      @@bollockjohnson3706 lol

    • @jtseafarer6871
      @jtseafarer6871 3 роки тому

      I was also one of the dry dock crew of Ms Rotterdam I have pictures of bulbuos bow but on that time I don't what is the used of that bulb

    • @i_know_youre_right_but
      @i_know_youre_right_but 2 роки тому

      Shite yank banter

    • @Coowallsky
      @Coowallsky 6 місяців тому

      @@i_know_youre_right_but Seethe. Cope.

  • @DJLsbVapes
    @DJLsbVapes 5 років тому +891

    Canceling the wave out, also reduces turbulence and cavitation on the rear propulsion

    • @bendover2684
      @bendover2684 4 роки тому +9

      Thanks i Just wanted a short 0answer and Not 4 Minutes of blabla

    • @isonbogosian3080
      @isonbogosian3080 4 роки тому +1

      Yoooooooo

    • @davidjames1068
      @davidjames1068 4 роки тому +7

      Really? For a typical freighter i would have thought that any effect would be dissipated long before it reached the stern of the ship. And no freighter should ever be using it's propellers close to cavitation speed.

    • @mmonroe8253
      @mmonroe8253 3 роки тому +3

      There you go! It took you 10 seconds to explain what the video tried to do in 4+ minutes Thank you!

    • @bobthebuilder2922
      @bobthebuilder2922 3 роки тому +1

      Yes

  • @andremacedo8463
    @andremacedo8463 6 років тому +611

    I love how the internet have all the answers to those random questions we ask ourselves about lol

    • @moritzwegge6835
      @moritzwegge6835 5 років тому +1

      Yeah!

    • @doughesson
      @doughesson 5 років тому +4

      Look up cow aerodynamics some time.
      You won't regret it.

    • @NoShame22
      @NoShame22 5 років тому +4

      And all the questions we don’t ask ourselves

    • @lukeaabbcc313
      @lukeaabbcc313 5 років тому +2

      @@doughesson down the rabbit hole i go lol

  • @jeanclermont4195
    @jeanclermont4195 4 роки тому +1051

    “Is that a bulbous bow on your hull or are you happy to see me?”

  • @sammynicholas
    @sammynicholas 5 років тому +148

    There is actually one more very important reason for the bulbous bow along with the wave canceling effect!
    A ship which moves considerably slow without the bulbous bow will create 70% more air bubbles than one with a bulbous bow, as well as the lack of wave counteracting effect, moreover the bubbles created by traditional bow gets push to the bottom of the hull which causes a loss of water pressure underneath the hull inturns less force pushing against hull, and decrease buoyancy, therefore the ship will sit lower in the water and create more drag and less hullage capability.
    on the other hand ships with bulbous bow, when the bow pushes against the water, it creates fewer air bubbles and the bubbles are mostly displaced to the side of hull, therefore, the hull will maintain its water displacement, less drag and what's even better is the air bubbles get push to the side of the hull making it less drag from the side of the hull resulting better fuel economy!

    • @aberamagold7509
      @aberamagold7509 4 роки тому +4

      Did you just make that up? 😃
      JK it was a very informative comment.

    • @chsemaphor
      @chsemaphor 4 роки тому

      Lol

    • @sammynicholas
      @sammynicholas 4 роки тому +6

      @@aberamagold7509In fact I tried it out on a few scaled models and in CAD fluid test and both supports this...

    • @robbiejosh6082
      @robbiejosh6082 3 роки тому +1

      I don’t believe you

    • @BobSmith-cb5xr
      @BobSmith-cb5xr 2 роки тому

      Sounds some some brilliant mark Twain shit I like to make up. Sounds good, but is it really true?

  • @mcfly7613
    @mcfly7613 4 роки тому +17

    A lot of this I already knew because I was a US Navy sailor but I’m still learning a lot from these videos, I’m glad I bumped into this channel. Well done.

  • @danmcclaren5436
    @danmcclaren5436 6 років тому +357

    That’s actually pretty genius. “Hey let’s make a second set of waves ahead of the first that will cancel each other out”

    • @DrWhom
      @DrWhom 5 років тому +1

      Is the effectiveness a function of speed?

    • @fieldmarshal7298
      @fieldmarshal7298 5 років тому

      @@DrWhom yes

    • @RyanMcIntyre
      @RyanMcIntyre 4 роки тому +3

      Same principle behind noise cancelation

    • @hyonker2134
      @hyonker2134 4 роки тому +4

      I used the wave to destroy the wave

    • @DrDeuteron
      @DrDeuteron 3 роки тому

      bow's passive cancelation. Not to be confused with Bose active cancelation.
      also it only has to cancel the wave along the hull, I mean somewhere out there, there might be a bigger wake.

  • @WheelEstate
    @WheelEstate 6 років тому +2932

    I consider anyone with a British accent to be an expert.

    • @CasualNavigation
      @CasualNavigation  6 років тому +169

      Thanks Manoj. As long as we all keep learning, that's the main thing

    • @nearestyoutube
      @nearestyoutube 6 років тому +60

      Mr Bean?

    • @mog882
      @mog882 6 років тому +15

      Manoj Philip They feel that way as well.

    • @MrMunchbunch83
      @MrMunchbunch83 6 років тому +64

      I'm British with a British accent and I'm an expert in fuck all!!!

    • @bigbrother9531
      @bigbrother9531 6 років тому +12

      Not me. All I gotta say is, name a ship disaster, then ask, who built her.

  • @crs2385
    @crs2385 6 років тому +1359

    0:42 ''Let's consider this vessel'' Me: TITANIC!

    • @notesl5576
      @notesl5576 6 років тому +38

      CRS Ikr it's clearly her..

    • @z0901
      @z0901 6 років тому +13

      It's so easy to see

    • @dylanhultman3922
      @dylanhultman3922 6 років тому +75

      CRS It could of easily been the Olympic. The Olympic classes all look the same.

    • @usmc5977
      @usmc5977 6 років тому +1

      Me too hahahhh

    • @prnothall9302
      @prnothall9302 6 років тому +22

      Dylan Hultman correctly, could HAVE been, or could’ve been. Could “Of “ been, is non- sensical. Just sayin’.

  • @vulture3874
    @vulture3874 3 роки тому +234

    I'm going to use the information in this video at parties. As an icebreaker.

    • @felixiathegoat3259
      @felixiathegoat3259 3 роки тому +6

      Made me laugh out loud

    • @cindyzins6628
      @cindyzins6628 3 роки тому +2

      Me too! (LOL, I mean)

    • @weppwebb2885
      @weppwebb2885 3 роки тому

      Ironically icebreakers do not use bulbous bows as far as I know. Might want to try a spoonshaped bow for maximum effects. xD

    • @johnpatz8395
      @johnpatz8395 3 роки тому +2

      That’s freaking horrible!
      I LOVE IT!

    • @abhi2349
      @abhi2349 3 роки тому

      Lol.. I was already thinking about it !!😂😂

  • @Srgfowler
    @Srgfowler 3 роки тому +52

    Never searched for anything revolving ships. But I still clicked

    • @MeteoricStoneofSouls
      @MeteoricStoneofSouls 3 роки тому +1

      That's because Google knows what you want to see before you do.

  • @killerta87
    @killerta87 6 років тому +156

    You know I've always wondered about the bump on the bow of a ship but never seemed to research it honestly.
    Stumbled across this video and honestly learned about it ha! Simplistic explanation and well laid out video makes it super easy to watch. Well done sir

  • @TheRealBoroNut
    @TheRealBoroNut 5 років тому +364

    Nonsense. It was designed by Airfix so you have somewhere to hold the model when you paint it, as any fule kno.

    • @honeydew5022
      @honeydew5022 5 років тому +5

      Haha

    • @NPCSN
      @NPCSN 5 років тому +2

      🤣😂

    • @beepthemeep12
      @beepthemeep12 5 років тому +1

      Lmao

    • @gormauslander
      @gormauslander 4 роки тому +16

      And then the shipbuilders were like "oh heck, our ship isn't accurate to the model" and changed it

    • @kartikkalia01
      @kartikkalia01 4 роки тому +1

      Thanks

  • @StratMatt777
    @StratMatt777 4 роки тому +61

    Now I understand what the hull is going on!
    Thank you!

  • @boatman222345
    @boatman222345 4 роки тому +4

    Great explanation! I used to provide water taxi service to ship's agents servicing the cruise ship industry here in Maine. Twenty-five years ago these cruise ships generated huge waves in their wake. Today a 1,000' cruise ship produces a wake smaller than that produced by a 36' lobster boat largely due to these bulbs. And speaking of lobster boats, a local fisherman took a clue from the cruise ship industry and added a fiberglass bulb to the bow of his 45' boat. I've photographed it several times while the boat was tied up to the dock but have never had the chance to ask the owner if it has worked to reduce fuel consumption.

  • @williamthethespian
    @williamthethespian 6 років тому +211

    Excellent explanation. Thank you.

  • @adamdickinson2894
    @adamdickinson2894 3 роки тому +85

    1:37 "If we think back to mathematics."
    Me: * Vietnam-style flashbacks begin *

  • @SinominStudios
    @SinominStudios 5 років тому +1484

    When I was younger, my dad told me it was for ramming sharks

    • @iaffrayliillii704
      @iaffrayliillii704 5 років тому +48

      Lmao that made me laugh

    • @hiddenname8953
      @hiddenname8953 5 років тому +36

      Happy younger life...

    • @d3m3n70r
      @d3m3n70r 5 років тому +61

      Right. But it renders useless, when they already began to form a sharknado.

    • @certaindiaster59
      @certaindiaster59 5 років тому +2

      d3m3n70r lmao! Not the f-in sharknado!

    • @certaindiaster59
      @certaindiaster59 5 років тому

      It started off with only female sharks but eventually it changed to anything in the water and nothing was safe from then on...

  • @JackMayhoffer
    @JackMayhoffer 3 роки тому +302

    I woke up with a bulbous bow this morning.

  • @alecmagill5337
    @alecmagill5337 5 років тому +126

    “This first vessel” is clearly the Titantic

    • @irongoatrocky2343
      @irongoatrocky2343 4 роки тому +3

      Full Speed Ahead!

    • @patagualianmostly7437
      @patagualianmostly7437 3 роки тому +13

      Or...perhaps...one of her sister ships...which gave decades of service. Mmm?

    • @angelvillegas9604
      @angelvillegas9604 3 роки тому +3

      @@patagualianmostly7437 Titanic

    • @ICUinthedark
      @ICUinthedark 3 роки тому +7

      @@angelvillegas9604 nope not Titanic, there is no Jack and Kate on the top deck on the front...

    • @angelvillegas9604
      @angelvillegas9604 3 роки тому +2

      @@ICUinthedark Jack's not real

  • @wavehaven1
    @wavehaven1 6 років тому +68

    The bulbs were from WW2 submarines for their sonars, it just worked out for great unexpected advantages other than for sonars. Then so, the bulb design went to ship bows....thanks to the WW2 submarine.

    • @Shloomy_Shloms
      @Shloomy_Shloms 6 років тому +2

      wave haven A lot of ships in at least the US Navy still use the bulbous bow to house their sonar

    • @CasualNavigation
      @CasualNavigation  6 років тому +13

      A lot of merchant ships do to. It is a nice empty space right in the bow so is ideal for sonar

    • @DerSchwantz
      @DerSchwantz 6 років тому +2

      @@CasualNavigation are you crazy or do you not even know merchant vessels have no sonar. The bulb is a void with nothing in it. In some vessels it is common to the forepeak..commercial ships have a transducer for the depth sounder. It's a little bigger than a hockey puck and sits up forward.

    • @NPCSN
      @NPCSN 5 років тому

      I was actually wondering this exact thing (about subs and sonar) I was wondering if it was an accidental discovery. 😁 good stuff. :)

    • @mayuri4184
      @mayuri4184 5 років тому +3

      The Yamato had it too IIRC.

  • @scottboardman8070
    @scottboardman8070 6 років тому +15

    Wonderful explanation, in 4mins I feel like a smarter man!

    • @CasualNavigation
      @CasualNavigation  6 років тому +2

      Thanks Scott. Glad you liked it.

    • @patagualianmostly7437
      @patagualianmostly7437 3 роки тому

      Is that not the whole reason for You Tube existing?
      Just a shame more don't use it.... after watching those of Jay Leno.
      Dear-oh-Dear. The billions wasted on education.
      It could actually fund a social health care programme........

  • @braddixon3338
    @braddixon3338 5 років тому +6

    I've seen those many times and always wondered what they were for. I've heard anywhere from a forward weight to help hold the bow down, to breaking the waves before the bow has to hit them, but this is the first time I've heard about the destructive interference design, how cool!

  • @Dirckaw
    @Dirckaw 4 роки тому +6

    Things that we spend whole day in studying, learnt in 4 minutes. Thanks!

  • @ROK-dn5rm
    @ROK-dn5rm 4 роки тому +5

    I was told that they were small rooms for radar sensors or something, I don't remember where I learnt that but this makes a whole lot more sense, you explained it very clearly.

    • @zo5679
      @zo5679 Рік тому

      It true for the Arleigh Burke Class Destroyer and other military ship

  • @Malisti04
    @Malisti04 5 років тому +9

    All this time I thought it was for crushing ice. I learnt something new today. Thank you

    • @DeathByLego
      @DeathByLego 3 роки тому

      There are some for crushing Ice!
      The have bigger, angled fronts to push the ships above the ice, then the weight breaks the ice!

    • @thatdude101ish
      @thatdude101ish 3 роки тому +1

      @@DeathByLego dam! that was what i was going to say, ice breakers are very costly to run due to the flat hulls and the drag.

    • @DeathByLego
      @DeathByLego 3 роки тому

      @@thatdude101ish have you seen the biggest Russian one?! It’s an absolute monster.

  • @Allthingstech3108
    @Allthingstech3108 6 років тому +147

    This is called "destructive interference"

    • @Allthingstech3108
      @Allthingstech3108 6 років тому +17

      jon doe The phenomenon is called destructive interference it is an important phenomenon in the physics of waves.It is taught at 1 year college and senior classes in schools

    • @Perifroog
      @Perifroog 6 років тому +8

      jon doe
      Thats what it's called itself, but the effect it has is callef destructive interference

    • @Allthingstech3108
      @Allthingstech3108 6 років тому +7

      jon doe correction "gone to" instead of went to

    • @lelandlewis7207
      @lelandlewis7207 5 років тому +3

      Sounds like Tump's foreign policies. 😀

  • @Rincypoopoo
    @Rincypoopoo 5 років тому +10

    Brilliant. Short, neat , clear and interesting. Thank you.

  • @Robert-gg7ck
    @Robert-gg7ck 4 роки тому

    Wanted to shout out the way you remind users to like videos without directly stating it, I and im sure many others appreciate your indirect approach

  • @jduff59
    @jduff59 4 роки тому

    I've lived this long not knowing what the bulbous bow was for, nor did I know why ships are painted red below the water line, and I've learned both in one night. Pure UA-cam genius! Outstanding video, and not even one comment mentioning Ron Jeremy from the Peanut Gallery.!

  • @jimtownsend7899
    @jimtownsend7899 3 роки тому +31

    When I was young, I thought it was a sonar dome. Then I realized its true purpose. The first ship to have the bulbous bow was the S.S. Jimmy Durante.

    • @ember9361
      @ember9361 2 роки тому

      Hm like a beluga whale :)

  • @Stones_Throw
    @Stones_Throw 5 років тому +5

    I've just assumed forever that it was to add buoyancy to an area of the hull with the least. A great explanation.

    • @jalaluddinmorris2978
      @jalaluddinmorris2978 4 роки тому

      ... and by adding buoyancy it helps a ship do what it is meant to do - namely carry things.

  • @bikelifepov3755
    @bikelifepov3755 4 роки тому +5

    I love when UA-cam answers all my questions at 2am.

  • @potawatomi100
    @potawatomi100 Рік тому +1

    Outstanding explanation. I had to watch it again to refresh my memory. Well done!

  • @anthonyo.thector32
    @anthonyo.thector32 4 роки тому +2

    This video fulfills my daily quota for new things I learn. Thanks.

  • @Espanyol_Espaghetti
    @Espanyol_Espaghetti 6 років тому +515

    To differentiate male ships from females..

    • @thickschmeat7560
      @thickschmeat7560 6 років тому +31

      there are only female ships cause if a male ship gets penetrated. Its gay

    • @ianwinfield929
      @ianwinfield929 6 років тому +3

      There’s only two genders

    • @MrEazyE357
      @MrEazyE357 5 років тому +6

      All ships are female.

    • @janchocruz1378
      @janchocruz1378 5 років тому +1

      @@MrEazyE357 why?

    • @SuperKiko112
      @SuperKiko112 5 років тому

      And gay ships ? How to differentiate them ?

  • @YTomi26
    @YTomi26 5 років тому +10

    It sounds a bit weird to call it drag because we usually call it resistance. But i think it's to make the explanation understandable to those who didn't know Naval Architect. Great job!

    • @markgadsby5568
      @markgadsby5568 Рік тому +1

      Resistance is normally a force directly opposing something whereas drag is friction along the sides

  • @gb5776
    @gb5776 5 років тому +146

    It’s used for making baby tug boats that will someday grow up to be ships.

  • @frazerguest2864
    @frazerguest2864 4 роки тому

    Perfect video. Short, sweet, to the point with no waffle or bullshit. Thank you

  • @AngelVazquez-xh1dh
    @AngelVazquez-xh1dh 4 роки тому +2

    I went on exchange about 10 years ago... Lived a while in Finland... Traveled in Silja Line and Tallink, to Tallin and Stockholm... And also visited the Vasa Museum... I loved ships but never imagined I would end up studying naval Architecture as now ❤️

  • @TheFlyingCougar
    @TheFlyingCougar 5 років тому +166

    UA-cam: Hey you, we see you like to watch sitcom clips and funny animal videos. Now listen to this British guy explain the mechanics of cruise ships.
    Me: *ok*

  • @AussieDad79
    @AussieDad79 5 років тому +11

    I had no idea I needed to know this but I’m glad I now do!!

  • @andrewpaulhart
    @andrewpaulhart 5 років тому +5

    Subscribed to your channel recently. Really interesting to learn new things about an area that I’ve not really thought about at all before. Thanks

  • @dobermanpac1064
    @dobermanpac1064 4 роки тому

    Coming from a family of sailors for over 5 generations, I’m no expert, but I do know this.., The configurations belong the water line are the most critical when dealing with speed, handling and fuel/wind economy. It’s all about the math, not looks.
    Fabulous video.

  • @jkl542
    @jkl542 5 років тому

    I really appreciate how you get right to the point from the start.

  • @killingfields1424
    @killingfields1424 5 років тому +49

    Its there for the purpose of reducing drag and streamlining hydrodynamics. Plus it can alsi be used to RAM the hell those megalodon blocking the way

  • @HarpaxA
    @HarpaxA 3 роки тому +7

    I would have guessed for two reason :
    1. It's act like a bumper, to prevent the hull got damaged if it hit something
    2. As sacrificial part, so it get eroded faster by the water, than the original bow section
    Thanks that I found this video 😅

    • @loritsi
      @loritsi 2 роки тому +1

      i always thought it was for ramming in military applications

  • @abdulwaheedsayed5246
    @abdulwaheedsayed5246 3 роки тому +7

    We can add one more function to the bulbous bow: to get stuck inside sand and prevent ship from moving

  • @ACELog
    @ACELog 3 роки тому

    Thanks for a concise informative video! First time in my 67 years I've now learnt this. As a former engineer, I like to translate things in to my way of thinking: "Bulbous Bow generates an antiphase waveform (great pun opportunity!) that cacels the normal bow wave".

  • @pgVeritas
    @pgVeritas 3 роки тому +2

    This is great thank you. I love learning about anything! I used to go out with a girl whose father was a naval architect. He made millions because he created a piece of software that predicted the rise in water levels. He wrote it in C+ years ago. He was actually an arse outside of that. When I started seeing her he Contacted my university to see if I really worked their and completed a PhD there. As I was really well known, and this is a very specialist small university, which only has PhDs or Masters, HR contacted me, laughing about it. He pretended that his company was offering me a job, so he broke every privacy rule around. He thought he was the only person in the world with a PhD from a world top ranked university.

    • @anthonyboyce8844
      @anthonyboyce8844 3 роки тому

      You got a PhD?is English not your first language?

  • @b0bbuffet
    @b0bbuffet 6 років тому +69

    SILJA LINE!!!!🇫🇮🇫🇮🇫🇮🇫🇮 Suomi

  • @theotherside931
    @theotherside931 5 років тому +18

    *I have wondered this for years. I suspected it had to do with waves but how exactly I didn't know. Thanks for making this video.*

  • @elj6964
    @elj6964 5 років тому +5

    I am always thinking that it serves as a water break. Thank you for educating me

  • @Chimp_No_1
    @Chimp_No_1 5 років тому +2

    Your videos are always compelling. Thanks.

  • @Edsrandomthingschannel9295
    @Edsrandomthingschannel9295 3 роки тому +2

    Cool and to the point video! I knew the bulbous bow helped ships sail more smoothly but until now didn't know the principle behind it. 🚢

  • @NoaV2
    @NoaV2 5 років тому +4

    Thanks!
    I learn so much from your videos! Keep it up!

  • @zachlafleur6651
    @zachlafleur6651 6 років тому +36

    Nice job demonstrating this on an Olympic Class Liner from the White Star Line! If they only had this technology and knowledge over a hundred years ago that they do now (that and also safety equipment)?

    • @CasualNavigation
      @CasualNavigation  6 років тому +2

      Thanks Zach. Glad you liked it!

    • @dylanhultman3922
      @dylanhultman3922 6 років тому +3

      Zach LaFleur My first thought was “Is this the titanic?”

    • @ph89787
      @ph89787 6 років тому +4

      In which case. If Thomas Andrews can get the length of the bulb correct. Not only would Olympic, Titanic and Britannic be even more fuel efficient. The reduction of drag could raise their top speed by a few knots. Whether it would be as fast as the Lusitania and Mauritania, i don't know. But it would be close. Hell it would be even a great selling point for passengers.

    • @rimmipeepsicles1870
      @rimmipeepsicles1870 5 років тому

      @@ph89787 'cause what would passengers care about? Mostly luxury and speed. They would even retain the Blue Riband if they had bulbous bows for how many years, probably up to the inter-war period.

    • @vk2ig
      @vk2ig 5 років тому

      The increase in speed due to the reduced drag would only mean the RMS Titanic would've hit the iceberg at a higher speed and possibly done more damage so it might've sunk faster.

  • @bendepeel7846
    @bendepeel7846 5 років тому +4

    Just popped up in my suggestions thumbs up though!! You piqued my interest and now I know some thing I never knew that will probably serve me no purpose but I'll pull out one day like yah know what that thing does and explain

  • @MarkSmithSa
    @MarkSmithSa 4 роки тому +2

    It also helps dampen pitching, albeit slightly. The sonar dome of T22 batch III frigates, which is a larger version of a bulbous bow, reduced slamming noticeably.

  • @samipkapadia1995
    @samipkapadia1995 2 роки тому

    This is the first time i came across such an easy explanation. Thank you so much...

  • @Dawgs241
    @Dawgs241 5 років тому +11

    I'm trying to think, how can I use the information from this video to develop a pickup line at the club.

    • @rudlu_
      @rudlu_ 5 років тому

      Did you found out yet ? I'm interested

  • @davidev4480
    @davidev4480 5 років тому +3

    wow EXCELLENT video. I am now your newest subscriber.

    • @davidev4480
      @davidev4480 5 років тому

      I also saw ur "why is it called a "bridge" video. Great stuff. Now just gotta catch up with ur other work

    • @davidev4480
      @davidev4480 5 років тому

      I also saw ur "why is it called a "bridge" video. Great stuff. Now just gotta catch up with ur other work

  • @Ernoskij
    @Ernoskij 5 років тому +5

    0:22 "looking at these different pictures, you can see the ships are all different sizes" he says while showing only the very tip of the ship with no reference point in the picture. It's not possible to judge the actual size of the ship solely from those pictures :)

    • @NPCSN
      @NPCSN 5 років тому

      🤣😂 I was thinking the same thing. Like: am I supposed to do the calculus and physics on the water amd guess the speed and extrapolate the size?... Uh... No... Just zoom out. 🤣😂 besides, i dont know how to do that crap anyways. Lmao

    • @hardanheavy
      @hardanheavy 3 роки тому

      Of course it is. If you don't see it, you don't see it I guess ;)

  • @macnuggets887
    @macnuggets887 4 роки тому +2

    0:11 is a Swedish/Estionian company and it cruises from Stockholm to Tallin.

    • @pihlajafox
      @pihlajafox 2 роки тому

      Also Finland-Eesti and Finland-Sweden

  • @pool-io4360
    @pool-io4360 3 роки тому

    I always assumed it was to protect the ship from a front impact. But I never had a real answer and didn't even know what they where called. This makes alot more sence. Thank you!

  • @RyanZNO
    @RyanZNO 3 роки тому +6

    I live in the middle of the desert, why am I watching this at 1am...

  • @SPE4RHE4DS
    @SPE4RHE4DS 6 років тому +8

    I've Actually seen Tallink or Silja Galaxy in real life when I visited Latvia, Beautiful ship.

    • @Janfey
      @Janfey 4 роки тому

      I've been on it many times.

  • @vancelandry8314
    @vancelandry8314 5 років тому +95

    “As you can see, they’re all different sizes” that’s what she said.

    • @JorgeGonzalez-ut3pm
      @JorgeGonzalez-ut3pm 4 роки тому

      Lol

    • @jduff59
      @jduff59 4 роки тому +3

      At least it's not called a "bulbous member".

    • @boataxe4605
      @boataxe4605 3 роки тому +2

      I was about to give you a like, but I saw that you have 69 so I’ll leave it alone.

  • @rw2890
    @rw2890 5 років тому +2

    I love your videos, finally something to learn on the internet

  • @blujay2084
    @blujay2084 3 роки тому

    Nice video. Clear and concise. Something I always wondered about. Thanks for posting.

  • @justSTUMBLEDupon
    @justSTUMBLEDupon 5 років тому +4

    I learned something new today! The more you know 💫

  • @whenibecamethesun..8759
    @whenibecamethesun..8759 6 років тому +12

    You make it easy to understand..that is a very difficult thing to do...thanks

    • @CasualNavigation
      @CasualNavigation  6 років тому

      Thanks When I became the sun. Glad it was understandable.

  • @s.eashwar4894
    @s.eashwar4894 5 років тому +4

    0:02
    How many have travelled the Silja Line 🙌
    Hit like

  • @ZucchiniSlayer
    @ZucchiniSlayer 5 років тому +2

    wish I wouldve found this channel sooner, very informative. Great Job.

  • @G-TagLuke
    @G-TagLuke 4 роки тому +2

    Love your videos! short and to the point !great content

  • @stevewaclo167
    @stevewaclo167 5 років тому +8

    I almost bailed out at “...lets think back to mathematics...” but pleased I stuck it out! 😀 Excellent explanation and it seems you have attracted quite a number of intelligent and observant comments as well. 👍👍👍

  • @popedassalxvi5375
    @popedassalxvi5375 3 роки тому +3

    I guess what it was for after watching the clip at the start, feeling very smart right now

  • @thepsychosupersonicdiscopu4096
    @thepsychosupersonicdiscopu4096 3 роки тому +3

    I was brought here because of the 3 seals chillin on the bulbous bow.

  • @brapperdan
    @brapperdan 3 роки тому +1

    I always assumed it was a counterweight to kip the nose down in big waves... the real reason is even cooler. Good video

  • @jacebrogden3490
    @jacebrogden3490 3 роки тому +2

    UA-cam recommending answers to a question I didn’t know I needed the answer to

  • @itsohaya4096
    @itsohaya4096 4 роки тому +4

    I didn't know what that was, nor that this was a ship video, so here I was staring at the thumbnail having an existential crisis as my brain tries to dissect a single image.

  • @drServitis
    @drServitis 6 років тому +39

    I ALSO HAVE A 'BULBOUS BOW.'

  • @oftenlucid
    @oftenlucid 4 роки тому +7

    Q: Is the bulb designed for a specific speed or does it cancel out the waves at any speed?
    Great series of videos. I am learning so much!

    • @Blank-401
      @Blank-401 2 роки тому +3

      Only for a specific speed its only good for ships that traval mostly at a constant speed

  • @jamofbob715
    @jamofbob715 4 роки тому

    Videos like this are why I love UA-cam

  • @GreenTimeEagle
    @GreenTimeEagle 4 роки тому

    Hi CN. I'm really loving your videos so far. Keep up the good work!

  • @craigkaschan4822
    @craigkaschan4822 6 років тому +4

    Yes always wondered what they were all about Thankyou

  • @reifukaiyukikaze
    @reifukaiyukikaze 6 років тому +7

    Keep up....your channel is great!

  • @potawatomi100
    @potawatomi100 6 років тому +4

    Really well done.

  • @TheKurtsPlaceChannel
    @TheKurtsPlaceChannel 4 роки тому +1

    Great video. Thanks for posting this. Have a nice day.

  • @sosheeanand3537
    @sosheeanand3537 3 роки тому +1

    Thanks it is great piece of information, just curious does this type exist on automobiles to reduce the air drag? and also on aircraft?

  • @realkilju
    @realkilju 5 років тому +21

    The first ship is silja line from finland! Perkele

    • @kk89est
      @kk89est 4 роки тому

      Estonian company Tallink owns that ship what's called MS Galaxy. Silja Line is just a brand name nowadays after Tallink took over that company in 2006.

    • @jooagrmotorsports1
      @jooagrmotorsports1 4 роки тому +1

      Joo perkele

  • @candle_eatist
    @candle_eatist 4 роки тому +63

    Fun Fact: when its no longer needed they neuter the bow so that the ship can no longer mate with a partner

  • @MrNismopro
    @MrNismopro 3 роки тому +4

    After watching this I feel like I can figure anything out with three different color crayons... red, blue, and green.

  • @aberamagold7509
    @aberamagold7509 4 роки тому +1

    I've been wondering what the purpose of those things were and now I know.
    So thank you for clearing up one of life's great mysteries for me.

  • @swedishbloke
    @swedishbloke 2 роки тому +1

    Am I the only one finding it enjoyable that in the beginning of the video there was a ship in the archipelago of Stockholm