What it Takes to Manufacture Million $ Propellers Moving World’s Largest Ships 

Has to protect against cavitation well I am sure too. Not sure what makes something good for that but do know it is important and why people are investing in those new propellers. Uh toroidal I believe they are called. (Also more efficient!)

And yet the finishing lure industry still uses brass, which will tarnish from the oil in your hand, or you can pay way more for gold plated

That earns a like

Yeasty buildup?!

@@dianapennepacker6854 prop design is also specific to the actual use case, so something like toroidal may or may not add value - ducting alone can reduce some issues of exposed tip designs, and some of the directional pods as shown are ducted. BUT, I would love to see a cargo ship study using toroidal optimized for speed and ocean use just the same.

You'll love flowers

​​@@rickyanthonyyou can go near flower; but trying to do so near propeller and you are dead 💀

They are becoming even more beautiful with recent developments.

@@indridcold8433 Saw the one with each blade forming a sort of half mobius knot and they are supposed to be 20% more performant and 20% most fuel efficient ...problem is that their engineering has to be so precise they cannot be made in a foundry , only CNC machinery can make them so cost is stratospheric and not commercially viable yet .

​@@kingk2405I would also add that propellers hot logs, Rocks and whales and get damaged or bent and can be repaired. Those new ones cannot. You bend it it's toast.

Exactly - Retired trainer of ships officers here - My multiple te technical autisms are quite badly triggered!! 😂😂

What is that metal formula...is it Copper/Nickel/Aluminum? Why that particular alloy?

Mcc

Mmmmktg ml

Of m

Kkffffkf

👍

New phobia unlocked... Fear of a rotating ship's propeller... You couldn't pay me enough to be near that thing... The little one is bad, but the BIG one?? Nope... Of course it would be stopped, but if/when it starts... Excuse me while I put on my brown pants... How far does the push/pull of the water reach? I'll make sure to stay ten times that far away... Better yet... I'll say on the dock...

@@daytona1073 If you are a good swimmer and know what a lock-out/tag-out is, you would settle for the usual 100+ dollar an hour divers get. (I do understand tight spaces though)

@@daytona1073 You have achieved *Submechanophobia.* Congrats.

@@avgjoe-cz7cb Give me someone to watch my back for sharks and I'm 100% in.

@@daytona1073 Why fear of a propeller?

Those ship propellers are not brass, which is an alloy of copper and zinc. Modern water propellers are made of aluminum bronze with a little nickel added. This is an exceedingly tough and wear resistant metal.

yes a very incoherent clip with strange manufacturing highlights and missing some essential ones.

@constantinous shinas: Efficiency my fundament. As a kid, we did model airplanes with .049 CID engines that ran on what looked like lighter fluid mixed with oil, much like chain saw engines running premix. If the propellers weren't balanced, the planes would be shaken apart and "efficiency" would be a moot point. If something as big as these propellers were out of balance, it would tear up the prop shaft bearings in a hurry and efficiency would be an afterthought. The model airplane props would do 30,000 RPM. I have no idea how fast these giant ship propellers turn, but even at 200 RPM, the stern of the ship would shake violently if the sumbitch was out of balance. I imagine that polishing would make a smoother surface for passing through water and make it harder for barnacles to remain stuck on.

How often would screw-ups happen while casting

@@dohmies77 once a year, he said

Came here to see if anyone else had noticed this. I mean, if a gunked-up prop will REDUCE energy losses then why bother cleaning it? Lol.

Yes.

Not really. Art prioritises form over function. This is engineering, which prioritises function over form. Any aesthetical reward you derive from it is purely coincidental.

@@andoletube man you poo pooed on him

@@andoletube Yo am a philistine :-)

@@frankwolstencroft8731 If by philistine you mean "correct", then yes, I am. Thank-you.

@@travistucker7317 Had to be done. "True artists"...Please... Hyperbole, especially incorrect hyperbole, shouldn't go unpunished...

Lots of proprietary info protected from view.

Yeah i thought that looked like a huge electric motor but the dude never mentioned it.

YOU CAN'T HANDLE THE TRUTH !!

@@peterdarr383 sHAk

@@peterdarr383 sHAk

There are at least two of us. Those things give me the shits.

Faster moving air is over a wing create lift by lowering the pressure, propellers propel by creating thrust, not the same thing.

@@jakesmith6337 And thrust is created how? Oh, by creating a low pressure differential in front of the propeller...

@@jakesmith6337 same principal different name due to directionality 😄

That's what Lock out-Tag out is for.

And safety work permits

@@thebogsofmordor7356; ;b

"Don't go until I say all clear" "You said ALL CLEAR?" "no - i DIDN'T say "ALL CLEAR" . . . etc

The big ship has very different systems of engine starting. And Mega size of diesel engine takes 6 hours at least to be warmed up before starting. Of course the order of engine starting is on the captain when 'stand by' for navigation after all ship hands are ready. It is totally different from simple cars or small boats.

Think personal watercraft, AKA "Jet Ski"?

They are usually electric. Essentially, the engine onboard the ship powers a large generator which is used to power the thrusters, along with all the other electrical systems onboard.

This is so stupidly nontechnical it doesn't even frame the content within it correctly and uses hackney phrases like "liquid metal" rather than "molten metal", it just goes on and on with that rubbish, they don't even point out the fly-cutting etc.

​@@CanonFirefly no, most large cargo ships are direct shaft drive...

@@skippyguy3 I meant most thruster pods not most cargo ships

The Tesla boat will be self steering, so that the human crew can be dispensed with.

Speaking of nitpicking, would you like to have another go at spelling “reversed”?

@@Lozzie74You may insert an _"s"_ where applicable.

​@@Lozzie74 Also "he" and "shops" lol.

👍

Wow! That is amazing. As a machinist I really enjoy learning about other industry.

What about the small animals you drive above that get smashed?

$800,000

If you have to ask, you can't afford it!

Ovisi o velićini propelera kao i broju pera 4-6,dali je kut pera promjeniv,dali su pera zamjenjiva ili je cijeli propeler u jednom komadu,

I'd pop a guess at 200k for material ,and 500 k for the machine work.. Roughly 700k.

I would guess at $250,000