Why Are Big Ships Faster Than Small Ships?

People who think Bigger is Slower than Small live a Dangerous Life.

yah watched this 3 times. and still dont undersand. it... so why does my 16ft 7 carrier boat weighing 3600lb. get on plane at only 7 knots. or on gauge 13 mph.. bearly above idle.. like 1/16 engine throttle hey only does 65 at full throttle... doesnt make sense

Seeing those jet engines on the side of the ship at the end makes me really want to see this happen for real. I know it’s not realistic but the boy inside me really wants it

Thank you! Now I understand a bulbous bow!

This is so incredibly interesting. It's when water waves show their similarity to other kinds of quantum waveforms. Though, higher drag meaning higher hull speed is still confusing to me.

All waves are disturbances in a system that transfer energy. Imagine if we could ride radiowaves, which can be MUCH longer than any water waves. It'd be like you're suddenly propelled 30 meters into the air without seeing anything, but you ready your antiparticle surfboard and ride this invisible wave until a mountain gets in your way. Or you accidentally leave the atmosphere and die.

because they have big ass 100000 hp+ engines, your welcome...

inertia

First of all, 300 meter container vessels are in operated like 20-22 knots. On the other handa, 300 meter tankers and bulk carriers are 14-16 knots. Bulk carriers burns 140 Tons a day while containers burn 240 Tons daily (rough estimation). And small containers like 150-200 meter lengths are operated in 20knots. As you see, its not size, it is type of the cargo type and delivery time and port to port distance and freight rates. You must compare same type of vessels

And the biggest factor iiiiissss - actually just economics. The "optimal" speed varies with length - given the same overall proportions. But bigger ships don't have the same shape. They are faster cause despite that making them less efficient then they could be overall the shorter travel time means they can transport more cargo (and some argo is also time sensitive).
If you can generate the same profit by paying 20% more in fuel but in just 70% the time - you are making more profit.

And that is not to mention that larger hips are inherently more efficient as drag does not scale with weight linearly. Twice the total mass does not produce twice the resistance. A Ship twice as heavy, with twice the fuel and power will travel faster even if it was the exact same shape and size.

And of course ships are designed for specific speeds with the humps as they have a fixed length and that has to be in the right relation to the wavelength to reduce the drag. At the "wrong" speeds it will increase the drag just as much as it can decrease it at its designed speed.

I don't know her hump speed, but my wife's hump speed is pretty fast.

It are not. Almost nothing is as fast as a jet ski and for sure not a big ship.

the music made the video unwatchable.

Compression back pressure and pushing like we all say turbo when dropping ass

So…why are bigger ships faster?

…they ain’t.

Good video. Where’s P-Hub?!

I feel like this video wasn't a minute longer or shorter than it needed to be.

You do Aaawesome Vids!!

I don't get it...

I see now why they measure their speeds in knots... cuz I did knot understand any of this.

I have learned much and will now calculate the optimal wake surf speed for my boat thank you.

Bigger motor bigger propeller faster speed and if ya ride the 🌊 you'll get there even faster 🤣🤣🤣🤣

"Eat my Wake"

-The Great Outdoors

Time wasting video

Спасибо
Непонятно

Hump speed 💀

that was pretty interesting

To summarize - waves, ship length

Why don't they use kilometers instead of knots

Ah yes... Fred.Olsens ferry's are crazy

I think the commercial world is missing out by not attaching massive jet engines to cargo ships, personally. Thanks for the video!

I learnt 💩 from this video. Like if you agree

What about surface area to mass ratio? Resistance is proportional to surface area, which scales proportional to L^2, but mass is proportional to L^3. Volume is also proportional to L^3. Which means less resistance per mass cargo for larger ships, and hence less fuel burn per unit cargo. Or alternatively you can take a higher speed instead of less fuel burn.

Guess before watching: bigger ships need bigger (or more smaller) engines and having more/bigger engines means more speed

Edit: not only was i wrong, but big engines being expensive fuel wise and frowned upon from environmental perspectives actively counters my idea
Its really cool to learn stuff like this

So which speed is most efficient? Somewhere between 2/3 wave length and hullspeed? Or between hullspeed and humpspeed?

Cool Video !!! 😎

It’s amazing how so much engineering and math goes into things you normally would think about.

Use metric system, ahahhaahaha

I can answer the thumb nail in 2 seconds here, if you had a bigger car with 4x the power of your civic ya I’d say the bigger one will be faster 😂

A container ship doesn’t move faster than smaller yachts

Math is the best

Hull speed .

does the low resistance part of the curve, between the hull and hump speed have a name? it feels counterintuitive to talk about the hull speed when talking about the most efficient speed when the hull speed is the least effiicient. i understand that if one changes the other changes with it, but it still feels counterintuitive for me as someone uninitiated

insted of watching this 5 min waste of a video ill sum it up for all u dummies. SCALE

I always figured it was like how the large wheels on an adult bike go faster than a kids bike. Maybe it's the same principle, I didn't really understand hull speed on my first watch

Ahahaha hump speed

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Good.

I think a cargo ship with hydrofoils would be super efficient.

WTF