Inside US Navy's Massive Indoor Ocean

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0:00 The US Navy's indoor ocean
1:06 Why are physical ship models still in use?
1:30 Renovation at Maneuvering and seakeeping basin
2:23 Why the US Navy re-creates waves from around the world
3:24 Cook Unity
4:53 What did the investigation into MSC Zoe reveal?
6:05 Why the water in the indoor ocean is not salty
6:33 How is the data from model ships used to estimate the performance of full-size ships?
7:53 What happens inside David Taylor Model Basin?
8:48 How is a ship's hull resistance calculated?
10:04 How are tests controlled at David Taylor Model Basin?
10:42 How do ship makers validate the performance of a ship from trials?
11:45 Performing self-propulsion tests and others on model ships
Why the water inside US Navy’s indoor ocean is not salty, how test results from a scale model can be translated into a full-size ship, why these rails are curved, even through they look pretty straight, and why with all the advancements in computer modeling, the Navy still relies on old school physical models, is #NotWhatYouThink #NWYT
Music:
Linda Low - Lucention
Avalanche - Anthony Earls
Fractured Paintings - Trevor Kowalski
Beyond the Mountains - Experia
Dismantle - Peter Sandberg
Thyone - Ben Elson
Subconscious - Nihoni
Machine Dreams - Oh the City
I Think I Was There
Footage:
Select images/videos from Getty Images
Shutterstock
National Archives
NAVSEA
US Department of Defense
Note: "The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement."

[@NotWhatYouThink]

Get 50% off your first order of CookUnity meals Go to cookunity.com/nwyt50 and use my code NWYT50 at checkout to try them out for yourself! Thanks to CookUnity for sponsoring this video!

[@briankruger3009]

Not sure why premium members still have to listen to adverts.....

[@rgh622]

@@briankruger3009 shut up geek!

[@collectorguy3919]

They only ship within the United States: Every Canadian would be surprised otherwise.

[@ross.neuberth]

"the issue is, whoever came up with this design. the solution is to replace that person." Im dead. lmfao

[@lukekolodziej9631]

I heard that and was like "bru" that's not how it works

[@Sugarsail1]

and the thing he was talking about was a pitch resonance jig, not a boat design.

[@Cowboycomando54]

Tell that to the guy behind the littoral combat ship.

[@sleepydoppy8516]

lol he just said that and kept on going.

[@britt.any_time]

😂😂😂

[@CTRG]

Every kids dream pool for their RC boats.

[@MeepMeep88]

Dream pool just to swim in it lol. Just need a better ceiling lol

[@Sabotage_Labs]

Kids???? Plenty of grown men as well...lol.

[@marcop1563]

"It is the combination of all these experiments performed on scale models that gives designers and shipbuilders the confidence that once the full scale ship hits the water for the first time it will hopefully perform as expected" *shows a video of an LCS being launched* I see what you did there.

[@Taladar2003]

I can't speak for ship builders but in software projects it is usually the customers and project managers who want to live in the fantasy world where they pretend everything is better than it actually is despite the protests of the software engineers and designers and similar people doing the actual work.

[@GamerbyDesign]

I think the LCS's problem was material used not hull shape.

[@marcop1563]

​@@GamerbyDesign I know, I know. I just think it was fun (and probably on purpose).

[@allangibson8494]

The two LCS designs had completely different problems - one had a catastrophically faulty gearbox and the other had a too thin hull plate at the hull midline that fractured. Neither was easily detected at model scale (because the ship models aren’t powered and the hull stress was under estimated. The fact that the LCS ships were actually too small for the way the U.S. Navy actually used them isn’t something a model can tell you.

[@erasmus_locke]

Ending with the LCS was a great touch

[@patrickblakethesaint]

This is one of the most fascinating NWYT ever!

[@fanBladeOne]

I share that opinion

[@michaelyoung7261]

I work at the Utah Water Research Laboratory and we often make models of dams (such as the Oroville Dam spillway that failed in 2017, before I started working there), canals, gates, and other water structures, and we use the Froude number in our models. We definitely also have number crunching that happens that accounts for a whole host of things that happen, and being able to have the video recording is very helpful. Basically, we make models so that clients can make informed decisions. Our work can help them save a lot, by spending 5 on a new model saving 85 that would have been spent making the full scale cause the alternate design is way better than the original idea

[@SimonSenaviev]

"Do NOT share publicly - Indoors ocean - Cook Unity (high quality video)" That's how the title of this video is translated in Portuguese Who the hell did this XD

[@felipeaugusto2600]

I guess they fixed it, for me it says. "Por que a Marinha dos Estados Unidos teve que construir um oceano interno"

[@pekkatoikkanen3996]

We have indoor pools where it is possible to simulate winter conditions with real ice crust in Finland. So the whole building is basically a huge freezer.

[@georgecrowley6543]

Always brilliant explanation and lead into the next segment. When you think you already know about a subject, these videos constantly give details you didn't. The tag line applies to every release. Keep up the great work!!

[@Arshiya602]

Title : USA largest indoor ocean Me: so that’s a large swimming pool right?

[@SCFoster]

Spent time at the David Taylor towing tank in Bethesda, MD and the towing tank on the Isle of Wight in the UK. Not only ship models are tested. Did the ditching model tests for aircraft, such as the V-22 Osprey Tiltrotor. Well done video, especially the explanation of the Froude number.

[@HansStrijker]

Awesome installation, and great video, but eh: 2:04 "instead of sound, they produce waves." Yeah, sound _is_ waves mate! 😝

[@NotWhatYouThink]

Correct, but you know what we meant 😉

[@arashnikoubashman6946]

I thought the same thing but gave it a pass.

[@danielfredel4193]

Not gonna lie I was thinking the same thing.

[@hewhohasnoidentity4377]

I would like to see a video on the history of the Naval Undersea Warfare Center in Walker Lake, near Hawthorne Nevada. Other than it existing, not much seems to be publicly known.

[@jimmydim2212]

very informative, thank you! subbed

[@miscme6046]

this made my day far better. thank you

[@shoemakerleve9]

I am a "sea trial" captain for an international seafreight company, I'd like to say thank you for making this video! Not enough information out there on what we do.

[@c.richardabbate742]

Great job with this! Thanks!

[@vibratingstring]

Decades ago, John Hoyt built a fully functional linear vwave towing tank at the Franklin Institute. I used to run the tank, but then the museum threw the whole thing out over one weekend. It was tragic. John Hoyt went and worked at Carderock. Haven't talked to him in 30 years

[@aurorauplinks]

Very cool to learn about this amazing test facility. too bad its not practical to make one of these for every town and city :) swim time. But it really is cool to test the physics of wave model, great people who came up with this plan and helped to build and run this over the years, probably saved a lot of lives and a lot of money.

[@tommooe4524]

I have been inside this facility and it is incredible

[@mickthurston9883]

Very informative. Thank you

[@zubair8378]

1:32 Ah my favorite place -Masb- Mask

[@darcydj]

When I was younger i worked at a place that had a contract with Carderock, just off the beltway in MD, coming from VA. It’s a facility where they test subs, ships and aircraft in water.

[@jacklav1]

Can we acknowledge the late Stephen Salter who invented the concept and designed the first wide wave tank with many wave-making paddles that can replicate any sea state.

[@eBaum96]

How the panels transition, but remain watertight is amazing. I must know more!

[@jorismk1]

A lot of footage from Marin, the Maritime Research Institute Netherlands is blended in...

[@RalphBrooker-gn9iv]

I grew up near Southampton and the river Hamble. A lot of maritime proficiency examination takes place in the region including piloting great cargo ships and tankers. On a lake at Warsash (famous for its D-Day role) student pilots sit cramped into miniature model tankers and learn manoeuvring skills. Almost like kids in pedal cars. It’s now run by Solent University. I guess they use simulators now rather than analogue model boats. At the time it was called Warsash Maritime Academy.

[@ralphbailey736]

Very cool thanks for the video..

[@jasonm7634]

Very cool! excellent episode

[@Revivethefallen]

That was fantastic!

[@aniksamiurrahman6365]

Wow! Wind tunnel but for water! Just wow!

[@TheLtData]

Check MARIN in The Netherlands!

[@JbeySaros]

Give this man those 3M followers

[@Robochop-vz3qm]

Incredible.

[@guarami1]

This facility is awesome. You can’t swim, but you can canoe it.

[@ImJusBuba]

David Taylor model basin, I have a place about 3 minutes from it.. was always interested on what it was, as they have Anti air missiles & an insane amount of security around the facility.., I’ve been driving by it since 2004, especially when it was under construction.. very interesting, it’s about 15 minutes away from DC as well.. right off the Potomac River

[@user-pj8ol1fc9o]

Fantastic video!

[@judolee6498]

This video was so cool!!!!

[@BonestheOfficial]

Just like indoor dining… smooth transition

[@extremechimpout]

0:58 Mr Lahey!

[@T_157-40]

That is pretty darn cool! And wise!

[@antoniohagopian213]

Since you finally researched about the froude number you should know now why a carrier cannot go faster then 30~35kts.

[@extremechimpout]

I have seen them go much faster than that

[@vibratingstring]

Froude number 0,4 is not a magical wall. Slenderness ratio raises the curves exponentiation region and lowers the exponent. Carriers are slender. They exceed 0,4

[@antoniohagopian213]

@@extremechimpout liar

[@antoniohagopian213]

@@vibratingstring how much horsepower does a cv with that much tonnate need to go faster then this? Go ahead do the math and tell me it's not behaving like a wall.

[@MrCubflyer]

Well we were doing 36 knots and they left us like we were standing still so I don't know where you got that idea.

[@samuelgibson780]

Wow someone's whole job is probably to make the coolest model boats of all time. Nice. 🤙

[@vibratingstring]

Yes, and there is a KZbin on another channel all about it

[@samuelgibson780]

@@vibratingstring oh, which channel? I collect those kinds of channels

[@vibratingstring]

​​@@samuelgibson780can't remember offhand. Type in carderock wave or some combination with abbreviation

[@vibratingstring]

​@@samuelgibson780I don't remember but search Carderock wave basin or something

[@vibratingstring]

@@samuelgibson780 I can't remember! I think actually I saw Veritasium talking to the model builder while doing a segment on this wave tank

[@Pestsoutwest]

Sound is a wave, and music is what you get when waves make patterns. (Piano keys)

[@AugmentedGravity]

This would be my dream to have when i was younger

[@jongmans38]

There is still a preserved hull testing in Dumbarton, Scotland. It was hired by Cunard to help design the hull of Queen Mary 2 as no other facilities where available at time. It is called the Denny tank museum.

[@PiersLawsonBrown1972]

Great place to visit!

[@geoffballe8766]

Wow,, most impressive 🇦🇺

[@colinbarnard6512]

What are the Public Swimming hours, and do they put in lane markers?

[@Programm3r]

Is it just me or do i want to swim in it really bad? 😂

[@projecttitanium-slowishdriver]

In Finland is the world biggest towing tank with ice. Used for a testing ice breakers

[@Chris-vz7en]

I'm just here for the cool little boats in the pool. The rest of it sounds very mathy.

[@KaiEskelinen]

Self propulsion tests rarely have the model propel itself fully and are most commonly used to verify the propulsion method (propeller pitch angle and rpm for example) There are multipliers calculated to find out to what degree a given model propels itself for a given propulsor, speed and scale. The carriage then still pushes on the model. Latest test we ran the model produced about 50% of it's own propulsion.

[@vibratingstring]

The commercial tank in Newfoundland runs full self propelled tests. We use them to design our AT/B units. The models are abut 30 feet long

[@UrgusHUN]

I want to try it…

[@gsftom]

Cool, interesting video!

[@FrankensteinDIYkayak]

I had some freinds who claimed to have gotten in there years ago to test kayaks. I have always wondered if it was true as they lived and kayaked in the area.

[@piedpiper1172]

2:10 Uhh…. Akshually, piano keys also produce waves because sounds just are waves 🤓

[@BonaparteStyle]

Is it just me or the Froude Number is the root of the divider of kinetic energy in the basic potential gravitational energy to kinetic energy transition? It can be quickly formulated from Ug=Ek mgh=(1/Fr²)mv²

[@jsnap1]

Damn that's one deep pool

[@CaptainAE1334]

I used to beg my parents to make a huge indoor operatable pool, ive ever got on my knees just for that xD

[@michaelimbesi2314]

I’m a simple man. I see Carderock, I upvote

[@Adamroable]

I was wondering if this was the place along the Potomac in MD

[@3ducs]

@@Adamroable David Taylor Model Basin. I worked down the road at the Army Map Service, a friend worked at the Model Basin.

[@steveg5576]

I've been inside the office side a few times. 3 ft thick walls with ship type bulkhead doors in places. Guards every few doors or so. Signs on the wall reminding workers of Safe / Vault Protocols during the day -- end of work day. No workers of any type that are not US citizens allowed on site -- at least in operational areas. It's some serious Sh*t -- like what you might see in the movies.

[@AugmentedGravity]

This is actually so fucking cool

[@JudahTribunal]

I used to work there.... NAVSEA Carderock Springs Bethesda Maryland

[@Etx-z9]

I can't swim in it? Aww man, there goes my weekend plans :(

[@alvinbontuyan279]

Froude was a damn genius

[@parachestalledarityeetus]

I new he was Canadian I had the gut feeling

[@bikerfisherman4775]

It's a same idea with airforce's wind tunnel, right ?

[@jimsvideos7201]

I'll bet that Froude really knew where his towel was.

[@ph11p3540]

No wind simulator fan bank to go with that pool? More and more large ships are sensitive to wind loading due to their large and tall superstructures

[@billgiles3261]

Do the tanks experience tides?

[@alberthodge631]

what about David taylor model basin.?

[@justinfowler2857]

I guarantee that someone has surfed inside that facility.😂

[@rkramer5629]

2:05 I mean… pianos make wave too…

[@jerrodbeck1799]

$7000 coffee maker I would love to do an audit on that facility!!!

[@WillN2Go1]

Science teachers and students. My Admin used to give me the science equipment catalogues so I could see all the things he would never allow us to buy. They had a square 'wave tank' less than a meter on each side and about 20 cm deep. $2200. Using old plywood I made a long narrow box. Two tricks made it work. I lined it with 5 mill construction plastic - this made it water proof. (just draped it, a few spring clips.) Simple. The second trick was at one end I made a long sloped wedge, 'the beach'. This was under the plastic. Works great. The beach does a couple of things. It absorbs the waves so the tank just doesn't become a sloshing mess. To make surface waves (most common) just move the top few cms of water at the other end of tank. To make deep tsunami waves just lift the plastic up a bit, so the bottom comes up, at that end. Richard Feynman said that using water waves to model electromagnetic waves doesn't work because water waves are every bit as complex as EM Radiation. True. However, you can see water moving. So a wave tank can do a lot of what the big tank in the video can do. What's neat is the tsunami waves are little ripples until they reach the beach, then they slow down, pile up and can splash right out the other end of the flume. Surface waves are bigger, noticeably slower. They run up the beach and lose their energy. The last tank I made was about 30cm deep, 7 meters long and about 50cm wide. Students actually had crested waves breaking on the beach. Hamsters could've surfed them. The tsunamis? They moved quicker, but were small until they climbed up the beach and blasted over the side (into the school garden.) That admin there wasn't as bad as the first guy. She came out glanced at the tank and said, "Don't make too much noise." The physics teacher at that school never even looked at it. What would make a fun naval engineering project would be to figure out how each century would've redesigned their ships if they'd used a wave tank. The 14th through mid 19th century ships would all quickly look very different. The one craft that I don't think would've changed? The Aleut Iqyax (aka baidarka). If you look at the stringers on the bottom, there's a big gap between the keelson and the first stringers. This channels the water giving the iqyax lift right where the paddler sits. I built an iqyax to do attempt this, but along the way I realized to get the 10 knots Captain Cook's navigator reported, I'd have to be able to paddle at least 6 to 8 knots. I was good able to sustain 4.3 knots, but not even close.

[@rickkearn7100]

Instead of sound waves the new wave generators produce water waves?

[@Dexxstar999]

If I ever get filthy rich I'm building a smaller version of that. I'm going to have the best pool in the neighborhood 😂😂😂

[@andrewg7576]

2:16 - Except a sound wave! Which is probably why at 2:08, don't know piano keys do create waves! Sound waves!

[@aarushmathur12610]

wow now that is not what you think

[@Sugarsail1]

0:23 LOL that's not a boat design, no need to fire the designer. That's most likely a sensor that tests resonance frequency in the pitch direction of a generic planing hull.

[@NotWhatYouThink]

We meant it as a joke! But that is actually showing the porpoising of a planing hull: kzbin.info/www/bejne/iZDFp2ytqLqcoNkfeature=shared

[@rainforestrc767]

When we were kids we would stomp puddles to check the seaworthiness 😂😂😂

[@pseudotasuki]

This is exactly what I thought, as I used to live right next to it.

[@MS-37]

What’s the facility called?

[@pseudotasuki]

@@MS-37 Naval Surface Warfare Center Carderock

[@JCS1069]

I drive past this place every day.

[@marcusallen35]

Isn't this place in Vicksburg Mississippi

[@jacoblahr]

Those beeps were way too loud

[@Johnnywhamo]

Whenever I see those monster ocean waves I realize just how much | love being on land. That would scare the ever loving sh!T out of me

[@Pen-sq7bj]

also imagine getting caught in one of those

[@unoriginalname4321]

Don't you tell me where I can and cannot swim!

[@sdoo-ou2ni]

nightmare scenario a Supercarrier gets struck by a rogue wave what would happen

[@ifell3]

What is the formula for reducing mass on the model then? Say you had a 1:50 model, if you reduced it's weight down there must be a formula because you can't reduce down the density of water or the gravity.

[@vibratingstring]

Mass scales with cube of length. All three Dims scale togther. In 50:1 you would have ratio 125000:1 but that's a probblematic model for accuracy. It's a problem: larger models give better results. We use 30 foot models to work with 500 foot ships. That is as small as we can go to get good results. And, you have to scale the moment of inertia on all three axes correctly as well. Then, because viscous effects scale doesn't work with the gravity scaling, you have to compute viscous drag and subtract it from results, then compute at higher Reynolds number of ship and add back in. To make that a bit easier, often turbulence inducers are glued to fwd part of model so that drag calculations are more reliable. Boundary layer stuff is what ultimately we have no solid theory for. But even the waves arnot fully theoretically covered: CFD does not precisely match

[@ifell3]

@@vibratingstring awesome thank you. I modelled a skin-on-frame kayak, as I designed it with the least amount of buoyancy. It glided really well across the pond. Then I started to add the mass of myself at the scale used for the dimensions and it didn't sit right compared to what the software said it would.

[@Greenjacket.]

Places like this is why I learned how to swim 💀

[@anotherbacklog]

Does that mean they didn’t change that pool water for decades?

[@loganpreskar9209]

I feel like Noah would make a scale model of his ark before he made it.

[@Mr.Manta5988]

I really like to think that there is a single bathtub drain in that pool

[@legacymaiden4209]

I'm not the smartest person on earth but I can recognize the smarter ones! wow

[@MrWadeant]

"Instead of sounds, they produce waves" Last time I checked sounds were waves...? Just being picky :P Keep up the great work sir

[@reclusiarchrobsimmons]

Anyone here to just hear him say “it’s not what you think”?

[@jo-nation6692]

Can any Boat Crafting Engineer use this facility

[@larrybremer4930]

The tanks is superior to computer modeling because with only minor alteration for the scale of the model to the water you can model far more particles IRL than any computer can handle. If you think on it, a scale models fluid dynamics are always going to be different than full scale because you cannot scale the water or air (whichever is applicable to the model) in other words a model airplane that is 1/8th scale still flies through full scale air so adjustments have to made to account for this, which is why a 1/8th scale P-51 does not fly like a full scale P-51 unless you play around with its mass and airfoil to account for the difference in air density. The same happens with the model ships in water (air and water are both fluids for this purpose) where they can account for the different density with tweaks to the results in the testing. The problem in computer modeling vs scale model testing is the scale model still uses a water molecule as the particle size to measure the fluid movement while a computer model particle size is going to be many magnitudes larger to have manageable calculation time scales. The particle size of the water is what makes the computer model less accurate. Once a computer can model each and every water molecule it will be as good as a scale test, or even better if it can model enough molecules to model the full size vessel without scaling the result. Today even modeling the flow around a propeller like you would put on an outboard motor only gives you an idea of how it will perform IRL, and always leads to someone actually building and testing a prototype before it would go into full production.

[@kurtnelle]

Well that was not what I thought.