I was in the US Navy and served aboard destroyers, and went to almost 40 countries on 5 continents and thru 4 oceans. Never gave any thought to the rudders, beyond the simple fact they steer boats and ships. Retirement gives one an opportunity to slow down, learn about and reflect on many things we simply didn't have time for in our working year's. I enjoyed this video. Thank you!
@chrisrobles8243 жыл бұрын
Nah man this video is lying to you it’s actually a group of guys under water pushing it around
@thalys10153 жыл бұрын
@@chrisrobles824 fax
@brrrrrr3 жыл бұрын
@@chrisrobles824 strenght:100
@eliteffsquadron99322 жыл бұрын
What was your rank Sir
@StreetArtMuzik2 жыл бұрын
Which rate? If ESWS qual’d, you would have certainly had to spend time down in aft steering learning the basics!
@CaptainChris695 жыл бұрын
I'm a tugboat Captain, working in Houston, and the ship channel leading from the Gulf. I show your video to steersman trainees, as it shows the physics very well. You should make a second video on 'flanking rudders' that tugs use to make radical turns, with long tows.
@user-lr6ce1mw4k3 жыл бұрын
Holy shit no
@funkycat96293 жыл бұрын
@@user-lr6ce1mw4k yes
@samaveshsingh82912 жыл бұрын
M now coming to Houston from.mexico
@jaysonlima71962 жыл бұрын
I second the flanking rudder video idea
@igneous0615 жыл бұрын
Never been into ships, never found them interesting.....but your videos are marvelous....
@borntochill5 жыл бұрын
i kinda feel the same way. shows again how anything can be appealing and interesting, if it's communicated properly. maybe teacher could take note.
@RoryRose_5 жыл бұрын
Same here. One of these videos just kind of appeared in my Recommended out of nowhere and I watched and now I'm hooked.
@mechanicalandrobotics5 жыл бұрын
@@borntochill bro I hate teachers, even an interesting thing becomes boring😵😵😵
@KAMZA.3 жыл бұрын
Odlicni su mu uploadovi!
@dk31113 жыл бұрын
Heretic!
@danielkaitel97205 жыл бұрын
I don't understand how this channel has so few subs, the videos are interesting and such high quality. Keep up the good work buddy!
@RoryRose_5 жыл бұрын
I'd guess ships aren't that common of an interest. I feel like most people wouldn't expect them to be interesting and would never really give them much thought.
@ianoliver38794 жыл бұрын
It's quality stuff. Good, useful information. No glitz, no shouting idiot, no irrelevant shots. Excellent. Thank you.
@jimmilton66444 жыл бұрын
236K is alot dude
@tmtan13033 жыл бұрын
Daniel Kaitel reading are so boring
@burntham87523 жыл бұрын
Because not everyone is into ships? were you really not able to think of that?
@MaverickX2k55 жыл бұрын
The speed of the air over the wing is not the reason for the lift generated, but it is a common misconception. It is actually the same principle as you explained with the rudder: the wing is slightly angled and redirects airflow. This causes a pressure difference which generates lift. The speed difference is just a result of the pressure difference
@MiyaAhmed5 жыл бұрын
I get so irritated whenever people use the 'speed' explanation as it is so inaccurate. I'm glad someone else knows about it! I wish this comment was higher up, or if Casual Navigation didn't make the mistake in the first place!
@ManuelSalomoneInc5 жыл бұрын
The Angle of Attack is an extremely important concept in aerodynamics. It's basically "how much angled the wing is in relation to the incoming airflow and so how big the chunk of redirected air is". Without this angle a wing will not work.
@TimothyChapman4 жыл бұрын
@@kramrle Dead link.
@kramrle4 жыл бұрын
@@TimothyChapman Thx for the hint. Link is updated. docshare01.docshare.tips/files/3422/34223648.pdf
@ameunier414 жыл бұрын
Both answer are good and are in fact needed. If you use only displaced air to get your lift, then how do you explain stall? Stall is the lost of the low pressure pocket of air above the wing, which is easier to explain with Bernoulli. The balance between the 2 depend on the shape of the wing, fighter goes too fast to really need Bernoulli, they would generate too much lift, so their wings are mostly symmetrical. If you look at a glider it's the opposite. At the end you can use both, if I was building a plane with a known wing, I won't need Bernoulli, but if I was building a wing, I would use it.
@alexcoolboy972 жыл бұрын
I am an engineer working in IT, and discovering this channel suddenly made me want to change my life completely and start working on boats 😂😂
@mariebcfhs94913 жыл бұрын
fun fact Steering board in German is Steuerbord, it is mounted on the right, which is why Starboard is the right hand side of a ship
@jehoiakimelidoronila54502 жыл бұрын
Thanks for further insight! Now that I think about it, what about the "portside" though...
@TerribleToaster2 жыл бұрын
@@jehoiakimelidoronila5450 since the rudder was on the right side, a ship could dock at a port on its left (or port) side. I am not that well versed in nautical terminology and history though, so if anyone knows their stuff better, please feel free to correct me
@mariebcfhs94912 жыл бұрын
@@jehoiakimelidoronila5450 almost all ports required large ships to dock on their left side so the left side is called port sode
@mariebcfhs94912 жыл бұрын
@@jehoiakimelidoronila5450 also, in German the starboard side is still called Steuerbord, and port side is Backbord, because most people the dominant hand is the right hand so the left is called Backhand, hence Backbord
@loginavoidence12 Жыл бұрын
@@mariebcfhs9491 the port side of a ship in English used to be called "larboard." it was changed in like the 16th century or so to reduce confusion for obvious reasons.
@alfredsutton72334 жыл бұрын
I’ve been interested in things nautical for over 50 years. You do a GREAT job teaching the subject. Ship handling in heavy weather and the use of sea anchors would make an excellent topic, if you haven’t done one already.
@CrazyPets05 жыл бұрын
Wow... simple and logical explanations, I need a professor like you...
@CasualNavigation5 жыл бұрын
Thanks Matinalii
@cellokid51045 жыл бұрын
I'm a pilot and I didn't know that ship rudders could stall
@drewthompson74575 жыл бұрын
I race sailboats. On a friends boat, he had a NACA 0012 foil, but his photocopy of the leading edge came to a point, so he made it that way. It stalled so easily, it was difficult to get around the course. My own rudder is proper NACA 0012, with a circular leading edge, as it should be. I chose a non- elipically loaded planform, so that when the rudder starts to stall, it warns me, so I can correct it before I lose control of the boat. Also, appraoching stall at speed on my 19 ft boat can load up the hinge to around a 2000 lb load. I've had to replace bent 3/16" thick welded stainless steel hinges (gudgeons). You do know that sails work as foils, so that the generated low pressure allows us to go into the wind?
@Vevvev84 жыл бұрын
The Bernoulli effect not only effects our wings, rudder, and elevators in the air but also effects other things in a fluid environment. I was shocked to learn helicopters could stall to but when I thought about for a bit it made sense. This has also made how submarines glide underwater more interesting since those wings on the sides actually serve a purpose. Submarines can be controlled like aircraft underwater and can stall, but of course the ballast tanks cause it to behave like an airship.
@damnedmadman3 жыл бұрын
In smaller boats that have an unbalanced rudder (so the center of friction is away from the rotation axis) a stall is not an issue, because the boat will still turn because of the friction, although it will lose more momentum.
@Soordhin3 жыл бұрын
Same as any control surface on an airplane can stall as well. They are usually designed to make that impossible as long as the aircraft remains within its design envelope, but either by external factors (icing for example) or flying outside the envelope (transonic speeds) can lead to stalled surfaces. Usually not an issue on the rudder, but it can happen to ailerons and the elevator, recovery from that issue can be very counterintuitive.
@alwaysbearded13 жыл бұрын
@@drewthompson7457 A concept I have to teach newbies on my boat. Don't stall the keel or rudder. Funny about your friend's photocopy. I should make a template and check the profile of my rudder ad keel. Rudder looks like NACA 0012 but might not be. Keel is not but is a compromise like most things.
@mattduke64902 жыл бұрын
I've been repairing boats for years ... am now a marine surveyor... and I had no idea that rudders worked this way. This was a great video!
@Sgrunterundt5 жыл бұрын
Most of your videos are great, the physics is usually correct and well explained. This one was airfoil misconceptions greatest hits.
@TheDarmach3 жыл бұрын
Right? I didn't quite expect that.
@nicwelch2 жыл бұрын
It would have been more helpful to point out which specific concepts have been misrepresented here, as opposed to just giving an unhelpful and quite frankly lazy critique.
@glypnir3 жыл бұрын
I learned about rudder types that I hadn’t heard of before, so that was good, it might have been good to point out that more turning authority can be had also by just making the rudder bigger. So the fancy rudder types are done to minimize depth, drag and length for a given amount of rudder authority. And you can minimize depth and length, and get some redundancy, by having multiple rudders. It’s all trade offs.
@billjones3932 жыл бұрын
I never knew there were different rudders as shown. I’m a better person for this video. Thanks.
@ronjohnson95075 жыл бұрын
When I'm asked how does a rudder work, i always say "just fine"
@jakepledger33103 жыл бұрын
I'm glad he mentioned stalling, this was a big thing we learned racing 420s vs the 420E sailboats. The E's had smaller riders on the same style of boat and overaggressive skippers could stall the rudders easily if they were used to the other style.
@MqKosmos5 жыл бұрын
I dont want to be a party pooper, but (2:30) the difference in speed was a theory that has been disproven. So what we are left with is Newton's third law, Bernoulli's principle and Magnus effect. (For symmetrical airfoils)
@GregKittle5 жыл бұрын
Robin Marquardt what makes you think that there is no speed differential across an airfoil? Every advanced textbook on fluid mechanics I have studied in both undergraduate and graduate school has dealt extensively with airfoils and there is speed differential. Granted the mechanics of an airfoil are extremely complicated (entire PhD dissertations have been written on the subject) so there is no way it can be described in a few sentences, but the basics can be understood by reading a good textbook in introductory physics if you want more information.
@MqKosmos5 жыл бұрын
@@GregKittle aor does not flow faster or slower across an airfoil because there is a longer way. If corrected for Bernoulli's principle, there is no difference. I actually did experiments and in addition real life applications suggest otherwise. I spend 120.000$+ on this stuff btw. The fact is that what is taught is not what's actually true. Those are theories. As of now there are 3 accepted theories on how lift is actually created.
@MqKosmos5 жыл бұрын
@@GregKittle air above an airfoil has no intention to end up next to the molecule it parted ways with before hotting the leading edge.
@MqKosmos5 жыл бұрын
@Agamemnon1002 yes
@MqKosmos5 жыл бұрын
@Agamemnon1002 the air above the wing is not faster because it has a longer way to the trailing edge than the bottom. It is a common misconception. For one air wouldn't have to or want to end up at the same time at the end of the wing(top and bottom) and in experiments it's seen that it doesn't.
@innovativemechanicaldesign4184 жыл бұрын
The video has explained the fundamentals of ship propulsion in excellent way. How a thrust force plays role in reducing drag in ships.
@173muppet5 жыл бұрын
Had no idea that rudders could stall. Makes perfect sense now that you've made me think about it.
@gd.ritter5 жыл бұрын
Would love it if you expanded on the rudder stall. How does that manifest to the operator and what consequences are there? What should you do if you need to urgently turn in an emergency but you've passed the stall point?
@slowfox5323 жыл бұрын
Thank you so much! Today I have learned again. YT is the best school.
@welshpete124 жыл бұрын
Thank you for your video . You have answered a question that has puzzled me for years . I saw a drawing of the system. Used to keep passenger liners stable in rough conditions. Where they would have short , " wings " on the sides underwater , that turned to keep it more upright . This design had short wedge shape on the trailing edge . I have asked many people why this was . Now thanks to your explanation of a Schilling rudder , I know !
@vaska9162 жыл бұрын
I love that your videos are informative and short without all the bloatware. Keep it up!
@jomelcastro99715 жыл бұрын
I already know about it, I just wanted to see how much complex the explanation can get
@zezonroni3 жыл бұрын
Wow! Great job you do, guys! Just thinking of the time you invest to create this wonderful material. Thumbs up!
@goo_fam01983 жыл бұрын
Lmao bet I’m the only one who heard the washing machine in the background. 1:25
@chriswoodford43312 жыл бұрын
I’m struggling to get my head around the minds of the 259 people (at the time of my viewing) who gave this simple and informative video a thumbs down.
@XPLAlN2 жыл бұрын
I would agree except YT hid the counter for some BS reason.
@adyfoster25204 жыл бұрын
Thank you ,,,,, this is all great for my Orals on Thursday 5th March 2020,,,, all the Colregs stuff is so much easier than reading them. Im Very grateful to you
@thiagomilanezi10265 жыл бұрын
Great class! 👏👏👏
@Hannodb19615 жыл бұрын
Since i have a rc model ship that shouldn't go too fast, thIs have been more informative than expected.
@towhidulnahid20413 жыл бұрын
Love from BANGLADESH 🇧🇩
@zioqqr42623 жыл бұрын
i was like "of course i know how rudders work" but then i watched the vid and thought "i didnt know rudders worked like this" tbh i was under the impression that every rudder was just a flat board
@StopMoshin2 жыл бұрын
I feel like it's fairly self evident but it's a well made video so I guess I'm not complaining.
@LeLe-bo7cs5 жыл бұрын
Love your channel
@JohnDoe-jq5wy2 жыл бұрын
WONDERFUL information... Merry Christmas
@sidsification4 жыл бұрын
Nice explanation
@Tewemeh2ter5 жыл бұрын
Casual navigation: shows diagram of airfoil Me (aeronautics nerd): :> Everyone else: :|
@kurrycane14834 жыл бұрын
So you're saying you're better than everyone else watching this video?
@allgaming40454 жыл бұрын
KurryCane he was implying that airfoils are not interesting to most people but even I love this
@hayatkhan60456 жыл бұрын
Love your explanation and your contents 👌💯
@CasualNavigation6 жыл бұрын
Thanks Shayan. Glad you liked it!
@DannyOvox35 жыл бұрын
Your channel made me get into ships
@thomasherbig3 жыл бұрын
Great video! The fishtail makes me think of the winglets on aircraft wings. Their purpose is also to minimize the air flowing around the edge from high to low pressure. The ship version seems to include additional effects, such as deflection, which you don’t have with planes. But they are amazingly effective, increasing efficiency by several percent. That’s why they are ubiquitous today.
@jort93z2 жыл бұрын
The stalling part at the end cought my interest, is there information on when a rudder stalls in the water and how drastic the effect is?
@OFFICIAL_VIDEO_AWARDS5 жыл бұрын
You should do a video on how boats and ships navigate and not ground in unfamiliar ports and harbours (like private vessels also)
@bettyjane66843 жыл бұрын
Yes please!
@ShipsoftheOceans4 жыл бұрын
Good little video.
@owl7255 жыл бұрын
thank you for the knowledge
@i5sproductions5 жыл бұрын
always known how they work but i love how he individualizes every factor gained by different designs over the evolution of humanity's sea legs
@jasonirwin46315 жыл бұрын
You have gotten how airfoils work back wards Faster=lower pressure Slower= higher pressure
@Vinzmannn5 жыл бұрын
Yeah, it's a bit off
@brycering59895 жыл бұрын
what part of the video are you talking about? This part 2:45?
@shaunsiriweera1205 жыл бұрын
He's correct - he wrote slower water flow is higher pressure, which is true from Bernoulli's equation?
@tabulataste87955 жыл бұрын
Ya, lp=high speed, hp=low speed fr airfoil to create lift
@langrichar5 жыл бұрын
FOOL ! Airfoils operate in air , think about it , there is a clue in the name . Backwards is a single word . The man was correct and unlike you did not make a fool out of himself .
@ph11p35405 жыл бұрын
You should do a video on ship corrosion and rust control measures.
@George-li1yv5 жыл бұрын
I'm starting to like ships because of you
@erojerisiz15713 жыл бұрын
3:03 Idea: Split tail rudder The tip can split into two when turning and fold back into one when not That way there would be less drag at straight lines
@timothyfeist73645 жыл бұрын
2nd rudder type is merely a symmetrical shape. It does not act like. Clark Y airfoil shape. It acts only as a symmetrical wing would on an aircraft, making lift solely when there is a positive Angle Of Attack. Its advantage is that is slides through the water better with the curve and taper, like fairings for wing struts or wheel pants. Great information on the 3rd and 4th type rudders.
@sharinabhamid99556 жыл бұрын
I don't know how I got here but I considered myself lucky. P.S I never shown an interest in ship design but KZfaq recommends me here :)
@CasualNavigation6 жыл бұрын
Thanks Talking Human. Glad you found it interesting.
@sharinabhamid99556 жыл бұрын
The Casual Navigator I thank you that it is interesting.
@GiovanniV695 жыл бұрын
What about trim tabs on large rudders? Large rudders are too difficult to move, so the trim tab moves the opposite direction to move the rudder in the direction you want it to move with a much smaller force.
@DrDeuteron3 жыл бұрын
so the rudder is so big, it has its own rudder?
@DesperateSol5 жыл бұрын
that last rudder just looks like a shark fin
@savdful5 жыл бұрын
nice reversing alarm in the background
@thenthson3 жыл бұрын
I heard that and I thought I was losing my mind.
@PuffTMagicDragon2 жыл бұрын
The way a wing stalls is slightly different in that the airflow separates from the airfoil due to turbulence, you never really get out of the flow regardless of angel of attack due to forward movement.
@NUSORCA2 жыл бұрын
I remember when i was in kindergarten I draw ships with propeller and rudder, and those teachers clearly didn’t like the idea of that
@anupnadkarni95695 жыл бұрын
Best video.. Until now.. Why dont you make a video on all parts all the type of rudders you explained in this video.. It will be a unique video never done by anyone and will immensely help students-fir-life like us..
@CasualNavigation5 жыл бұрын
Thanks Anup. Those are good ideas for future topics
@gamertaglupethegod88325 жыл бұрын
I just learned some shit from this video. Feels good man.
@Tewemeh2ter5 жыл бұрын
Me: *plays from the depths* Casual navigation: *exists* Me: Binge watches all videos.
@CARRJ1423 жыл бұрын
Another great video.
@f12mnb5 жыл бұрын
Nice video - Q: has there ever been investigations of putting a rudder towards the front of the ship? I ask because of the turning force created by the rudder is ahead of the center of mass of the ship, would that allow the ship to turn a tighter circle? Or the "forward" rudder could help a ship turn tighter even if it also had a traditional stern rudder. Again, great channel.
@marinepilotchris30485 жыл бұрын
f12mnb A rudder at the forward end is not a new concept. There are a handful of ships with them already, but these generally only have a bow rudder when the ship is designed to be run astern for a prolonged period of time such as some icebreakers and ferries. A rudder at the bow for a ship moving ahead would not be able to steer. This is due to the vessels pivot point. A pivot point is quite difficult to explain here because of the complicated hydrodynamics involved. But, in simple terms a pivot point is a point about which a vessel turns. When a vessel is moving ahead, the pivot point is near the bow....so when a rudder angle is applied the vessel turns easily because the force of the thrust acting on the rudder has a long lever to push on and will be very effective. Imagine trying to undo a very tight bolt with a spanner.....if you use a short spanner you only have a short lever and will use a lot of effort to undo the bolt. If you use a longer spanner, you don’t need to use as much power as the lever is longer. The bolt in this case is the pivot point and the other end of the spanner is the rudder. The shorter the distance between the rudder and the pivot point means the ship is harder to turn, the further away from each other they are, the easier it is to turn. Chris - Marine Pilot
@f12mnb5 жыл бұрын
@@marinepilotchris3048 Thanks - like the analogy.
@f12mnb5 жыл бұрын
@@marinepilotchris3048 Thanks for the reply. I've been thinking over your answer and analogy and quite like the spanner/wrench analogy. Which makes me wonder, if instead of just a rear (standard) rudder, a vessel has two sets - a main rear one and an auxillary one in the front. I'm thinking of the land analogy of very long vehicles that have a front and rear steerable wheels (older long ladder fire trucks had this arrangement). Since you are trying to pivot around what sounds like the center of mass of the ship, this is like have a large two armed tool - like some drill taps or tire irons where there are two arms from a center pivot point. It would add to the complexity of the ship but might make it easier to turn or dock some vessels.
@marinepilotchris30485 жыл бұрын
f12mnb in order to achieve the manoeuvrability of vessels about the centre of mass bow thrusters are used. A bow thruster takes many forms and designs, but by far the most common is the tunnel thruster where a prop is placed in a tunnel athwartships through the bow of a ship. When the prop turns it sucks water from one side of the tunnel and ejects it from the other side. This will provide a turning force much greater than any bow rudder could produce. Don’t forget that a rudder needs water flow over it to have any effect. This would mean that if the ship was stationary and wanting to swing about the centre of mass, then you’d also need a bow propeller to provide that flow. The expense of installing a bow rudder would not be cost effective when a simple bow thruster does the job much more effectively and doesn’t require the ship to be moving ahead/astern to give its full turning power.
@f12mnb5 жыл бұрын
@@marinepilotchris3048 Thanks - that makes sense. Forgot about thrusters. Much easier to control and no need to have flowing water over the surfaces.
@user-pi2fj6xs6q2 жыл бұрын
Great video as always 👍🏼 👌, truly useful
@josephlai97593 жыл бұрын
Thank you for sharing. Hope you can do a video on the shape of the rudder. I think there are a variety of shapes. Some straight, tapered or curvy, with larger area at the bottom as compared to the top. Thanks again.
@Tuffaha5 жыл бұрын
perfect explanation
@mikebills93432 жыл бұрын
Really interesting thanks
@kostastsatsaris5333 жыл бұрын
Operating principle of the aircraft airfoil is much more complicated than many think and many wrong theories exist that confuse even scientists and physicists
@jacksontaylor57085 жыл бұрын
Quality video👍
@tamizhmurasu4894 жыл бұрын
All of your videos are so good. But only thing difficulty found is don't have subtitle. So kind request you to arrange subtitleS
@chanakalasantha16892 жыл бұрын
Thanks
@thomaskennings5 жыл бұрын
Not the best description of how airfoils work. There's no reason that the top and bottom air have to meet up again, and extreme designs that would take advantage of that rule prove useless.
@andresmartinezramos75135 жыл бұрын
The reason extreme designs fail is due to flow detachment, not because the principle is flawed
@victorselve83495 жыл бұрын
To be fair it is a rather common and easy to visualize explanation and I think for the purpose of this video it's more than sufficient.
@chrisipad44253 жыл бұрын
Great video!
@marineboyocean3 жыл бұрын
Great video 👍🏽
@felipebetioli43914 жыл бұрын
I LOVE THIS CHANNEL!!!
@daanbos59182 жыл бұрын
It also slightly slows down the boat
@wardogies4 жыл бұрын
Talk about bow and stern thrusters and azipod propellers
@uiio23915 жыл бұрын
Im not dumb but i still watched this
@TALHA06322 жыл бұрын
Great video
@JointedSpagel5 жыл бұрын
Unfortunately you've for the explanation of an airfoil wrong. The pressure is not the reason lift is generated. Its thanks to newtonian physics and the fact the wings push their fluid in the direction of their tilt causing thrust
@mwangikimani39705 жыл бұрын
Most of the lift is generated through Newtonian vector physics but some lift is generated by streamlined fluid flow around the airfoil allowing for less drag for same amount of lift.
@5peciesunkn0wn5 жыл бұрын
I was not aware rudders could stall. That's interesting.
@Andy-df5fj3 жыл бұрын
Bull. The airfoiled rudder works on the exact same principles as the squared off rudder. It just does so more efficiently because it has less drag. The velocity differential is still there for either shape.
@Angelica_Steam87505 жыл бұрын
What would happen if you had a combination of the fishtail and Becker rudder?
@mattmgmhs5 жыл бұрын
Your explanation of flowing “faster” and “slower” and the pressure explanations is convoluted. A better explanation for how aerofoils work is conservation of momentum. I am a mechanical engineer and one of the things you learn in early fluid dynamics is the conservation of momentum explanation. It hold water much better than the “faster on one side, slower on the other” explanation. It is also more intuitive and can be explained mathematically whereas the pressures and velocities in each case is nearly impossible to calculate.
@fi4re5 жыл бұрын
Keep in mind who your target audience is. Sometimes a more accurate model isn't better at explaining stuff than a more intuitive one.
@mattmgmhs5 жыл бұрын
David Szeto conservation principles are more intuitive as well. The whole idea of “molecules on one side have to flow faster on the other side to keep up” is bologna!!! How do the molecules on one side of the foil know they have to keep up with the molecules on the other side??? They don’t. I understand your point, and I’m not trying to be over critical of this video, it’s interesting and well made. All I am saying is for anyone interested in the physics of aerofoils learn the momentum approach. The pressure/velocity approach is a bunch of hand waving mumbo jumbo and it pains me that they still teach this in high school physics. Thanks for your response!!
@jaysmith14084 жыл бұрын
Now with the shilling rudder, doesn’t it take a drag hit given it’s dragging the wider tail through the water, instead of the other types that are all narrow tipped?
@PIlotrcm2 жыл бұрын
What about repositioning the fulcrum of the rudder? Instead of making a rudder a hinge, allow some leading edge of the rudder to be forward of where the rudder pivots. Wouldn’t that allow for a more responsive rudder?
@brucewelty76842 жыл бұрын
OH, it works like an airfoil in the atmosphere. When you crank over to the starboard, the negative pressure PULLS the ship.
@rajeshmisra10303 жыл бұрын
very nice
@thabg0073 жыл бұрын
My RC boat rudder blue paint is wearing off due to the force of water pushing against it when turning. RC boat goes 50MPH or in boat terms 43.5 knots
@karimnagyhabashi5 жыл бұрын
man you are the best , videos are awesome, do you have any videos for acts and publications and canadian mods
@CasualNavigation5 жыл бұрын
I have not covered acts and publications yet, as I don't find them as interesting as navigation itself. That's why navigation is the main focus of this channel.
@zvuho5 жыл бұрын
"Flap" like in aircraf too.. intresting
@yoshyoka6 жыл бұрын
Being a pilot whenever I look at an airfoil design I think about drag. How come that in ship design it appears to rarely be considered (e.g. the fishtail looks like an awful induced drag generator). Is it because the cost of fuel in ship design is less relevant or simply because it is negligible when compared to total drag?
@CasualNavigation6 жыл бұрын
I think it is probably negligible compared to the ship itself. I guess drag is only really a consideration when the rudder is straight anyway. As soon as it turns, the drag helps with the turn. Would be interesting to see the different fuel consumption with different rudders though
@seraphina9855 жыл бұрын
@@CasualNavigation Probably also has less of an effect for the ship as the rudder is tiny in comparison to the hull of the ship and being centre mounted doesn't really add to the hulls cross section in the water and of course it's contained within the slipsteam of the ship. Aircraft on the other hand have a minimum of two giant aerofoils sticking off the side of the aircraft, most of course also have two smaller upside down aerofoils (horizontal stabiliser) and the vertical stabiliser at the rear too none of these really get any slipstream benefit from the main fuselage so that probably adds to the much greater significance on the total drag. Plus the aerofoil design of the wings means they constantly produce induced drag as a side effect of developing lift too so anything that can be done to optimise this to a minimum especially for a craft that operates at such high speeds has massive effects on efficiency, thus such as the use of winglets to reduce the amount of vortex shedding which significantly increases induced drag.
@DrDeuteron3 жыл бұрын
(rudder x fuselage)
@paulinbrooklyn4 жыл бұрын
You included a picture of a Miele canister vacuum cleaner at 4:45, when talking about Hoover’s, I guess aptly making the point that at least in the UK “Hoover”, “hoovering”, etc. is in fact a generic term (that is definitely not the case in the US).
@EdMcF13 жыл бұрын
I read that the generic term was damned by President Hoover.
@Mullet-ZubazPants Жыл бұрын
the first stern-mounted rudders were introduced during the Han Dynasty in China, which should've been in the intro
@igorino17673 жыл бұрын
0:33 If that's a small board then the guy on the bottom must be Richard Hammond
@lingeswaryravirajan91365 жыл бұрын
Well said 👍👍👍👍✌😁😁😁😁
@a_Minion_of_Soros2 жыл бұрын
He called it a propeller, not a screw... I literally cannot even... :P
@SuperLetout5 жыл бұрын
You juste explained for me what is a stall un secs!
@dickjohnson42685 жыл бұрын
How do rudders work? Why, they work fine. Thanks for watching.
@Pertamax7-HD5 жыл бұрын
Ok sir
@subhashishbose77763 жыл бұрын
Future video idea: how do azipods work
@Glen_lastname4 ай бұрын
Do you have rudder trim as aircraft have elevator trim?