MOST ADVANCED Boat Prop Ever MADE
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- Опубліковано 23 бер 2024
- This strange invention combines advantages of variable pitch propeller and contrarotating propellers, former being well known as advantageous in terms of soft thrust reversing, engine load control and overload protection, possibility of maintaining constant RPM for an PTO generator drive and cleaner environment and later being known as propulsive device having higher propeller efficiency.
- Наука та технологія
We use these in the navy. Definitely much faster than reversing your entire shaft rotation. Pretty cool to see this scaled down model though.
Nice👍
Contrarotating props in this combo is a nice but expensive solution, and in higher speed boats without a protektive keel it is sensitive against debre an bottomcontact.
The propeller with variable pitch controll and in a more robust style are stil, and has ben the dominating princip for fishingboats in Norway for about 100 years from smal to big wessels.
Also prefearable on tugs and other workboats.
It is silent and has "infinite" speed and pull posibilities.
I have it in my "spinal cord" from growing up with smaller fishingboats.
and i love it, you have a soft gradual transition. I is the closest you get to perfect ! 👍
The FFG I served aboard had one...16.5 feet diameter, five blades, 220 RPM. Which doesn't sound like much until someone mentions the 2.1M lb-ft torque spec.
Very cool. Crazy to think of all the engineering that makes it possible. Do you ever find yourself in awe (of the mechanics or engineering required) or do you stay busy that you never have time?
I bet the pricetag and ongoing maintenance are astronomical.
I’ll be damned-I’m not even a boat guy, and that’s a sexy piece of engineering.
Maybe you're an engineer at heart
Possible 😊@@TheTechAdmin
Yeah man-things
ooooo, that's one engineered piece of machine. I love it.
We need more. Cost comes down with mass productions right. Seeing how Navey an world's maritime fleet use fuel by the F ton. Slip this budget line item in under climate change or fuel savings an range boost.
That prop probably costs more than I paid for my boat lol
Not really
@@bhekidlamini1199how could you know how much he paid for his boat lol this is so unnecessarily contrarian
@@48956l welcome to the internet of today. Early internet years were the best years.
this little model most definitely costs more than i paid for mine💀 (pretty much got an empty hull with an old engine)
When in saltwater you always want to be as complex as possible
lol
hahaahah
That's why it cost billion just to build subs. Dollar
That's how it would need yearly dry docking
😂😂😂
I would like to know what crazy engineering is going on in the TU-95 Bear Russian bomber with 8 blade twin counter rotating 18’ propellers connected to a 15,000 hp turboprop engine
Contra-rotating turboprops are just awesome
You can find the documentation online.
Search for - AV-60K.pdf
No you wouldn't
@@ThePrufessa I imagine it would not look too much different from an old
tractor.
I wouldn't understand it but Im interested and I'm sure I'd be fascinated@@ThePrufessa
Sounds like a full time counter income device 😎
That is the beauty of owing a boat....
Giant hole to pour money into....
@bonacker9762 😂
@@bonacker9762
Break
Out
Another
Thousand
.. ami right😎
Trying to buy things like bread, milk, fruit, vegetables, and eggs at the grocery store leaves your bank account nearly dry at this point.
How people are finding the money for a boat is unfathomable
@@hobomike6935 They make more money than you? There are better jobs out there ya know.
My father has a patent in variable pitch vertical shaft propellers [now used on high end tug boats]. He hired a professor to help, but the best guy never went to college.
Great brains can do wonders without the imitation from books.
Way to doxx yourself homie
All i can think is this is a Danny Duncan meme. "My daddy owns this..." :) I have been on a couple tugs that had 360 degree steering and variable pitch control. pretty awesome machines. it's hard to imagine how men build some of the big machines we use in the world today.
Hopefully he's wealthy. It's hard to find a new idea that hasn't been thought of before and patented.
@lordfordification i have gotten dozens of ideas but only to be disappointed after a brief Google search
Would love to see a tear down of how these are built and how they work. Amazing engineering
Not really. Just gears and shafts.
I had a variable pitch prop on my boat, a single prop, it was great for motor sailing in light wind, low engine revs and a lot of pitch, low fuel consumption. The mechanism was not very complicated, and did not need much maintainence.
same
Planetary gears
What's more intriguing is the human mind that God designed, it's these human minds that design these mechanical products ....but yet we take that for granted ...what weve got is amazing....
You will never have 100% of your engine power at the prop, too much energy is wasted to keep all other parts turning
It's true but this invention will Make revulsion.
Duh
Just be aware there is a dwell period when changing pitch and you have to allow for this when docking, or you will hit the dock.
Not an anti-momentum device huh? 😁
@@gregaldr I know this because I saw it happen with a Superyacht that I had the pleasure of working on. The Captain had never worked with a reversible pitch prop before and was unaware of the dwell period when changing pitch. This turned out to be very expensive.
@@pinballrobbiewhat is dwell period? do you mean the time to change the pitch?
@@geemy9675 Yes, the prop still turns but the pitch changes, as you can imagine the change will cause a time where the propulsion will be lost. If the captain is reversing into a dock for instance and changes the pitch to use as a brake, there will be a time where the prop is not providing fwd. or backward motion.
@@pinballrobbie So the same as a normal prop that has to reverse direction?
5%-6% increased efficiency, (from the limited info I've found), in exchange for exponentially higher production and maintenance costs? I bet the government loves this tech.
5% efficiency gain is enormous if that's on the whole propulsion energy required by the vessel.
Yeah, think about how much power it takes to shift an aircraft carrier or an oil tanker. A 5% saving can represent a huge amount of money.
It’s not about efficiency smooth brain. It’s about maneuverability. With this the gear box assembly can be cheaper and simpler and more robust. No need to reverse the prop shaft. Which means less maintenance for that. You can’t just slam traditional smaller boats into reverse. Especially if it’s got lots of power. But for this you can easily just reverse the blades and its built for it
Economies of scale
See: USS Jack
100% of the engine power remains at the propeller"? Really? So, no losses anywhere? No loss at the drivetrain? I wish Y/tubers would stop spreading inaccurate information.
I think he interpreted the information wrong and that the “100% engine power remains at the propeller” implies that being a CPP it doesn’t have the need to declutch or stop and reverse the engine to change from ahead to astern. But yeah, these shorts are useless.
Ignorance is bliss.
man you must be fun at parties😂😂
I think he means like 100% of the props potential…
The engine can run at peak efficiency at all times, you can spead up, slow down, and go in reverse, just changing the potch.
With the engine at 100% throttle at all times(theoretically) in other words.
That’s Beautiful! I love the engineering in that setup!!!
Seems like a maintenance nightmare
Sounds like something for the US Coast Guard to use then 😅
Its made for torpedos so it only has to work a minute kr so
How much more efficient is it compared to a typical motorboat prop?? Without knowing the difference between the drives, you aren't providing us with much useful info... How much fuel does it save per unit of time? How much faster does it cause a boat to go for the same amount of fuel?
Coaxial contra-rotating propellers can partially compensate rotational losses, increasing efficiency by up to 6% (it's not as much as aircraft).Boring out the outer shafts and the problems of mounting the inner shaft bearings were not considered to be justified for increase in efficiency (in times of relatively cheap fuel) but there were some larger cargo ships in the 90's that utilized contra-rotating.
Think of the controllable pitch as equal to maneuverability, the main engine does not need to be reversed. Different ship speeds can be driven with constant propeller rpm as required by the generator. Fuel consumption is higher. The higher propeller rpm at lower speed is hydrodynamically suboptimal. It's also higher cost to incorporate a CPP.
I apologize for not including it in a short, it was initially my plan to make a 10 minute video on it because there is a lot of technical info on it.
I like that you are asking questions and want to know more. Not being rude or mean. This is a super complex system. He’s only got 60 seconds to get the main info out. There are definitely longer videos that explain all that.
@@Tech_Planet no need to apologize. You only got 60 seconds. You would need 6 hours to really get into the super fine details. Keep it up. It’s working. People see it and think about it. Ask a question. Great job.
@@Tech_Planet Reversing the engine is the easiest thing to do, it's a non-consideration. You just pull the lever and it shifts camshafts 1 place over - and there you go, now it's reversed. Saving 2 seconds on not having to do this operation on a vessel that takes a solid minute to gain/lose 5 knots is moot.
Genius. It's application in fluids heavier than air but lighter than water have potential when space exploration becomes more common
Have they solved the cavitation problem yet.?
en.wikipedia.org/wiki/Prairie-Masker almost entirely prevents cavitation, but fouling of those tiny holes with barnacles and such is an issue.
Yeah with toroidal propellers, they're wholey designed to minimize cavitation losses.
I would love to see the schematics and/or a cutaway version of this.
Kudos to making it into a model! I love accurate miniatures better than the full sized item.
Modern engineering is a natural beauty.
Maybe a shroud to cut cavitation ? And manatee friendly.
Maybe manatees shouldn't swim near spinning boat props.
@@Bill-sp8kb the sheer hubris, and to be fair the manatee was their first
I love manatees, BUT . . . It's a submarine propeller. Manatees don't live where submarines operate so not even a consideration!
@@David-hm9ic cartels are running semi submersibles through manatee habitat all the time.
Why manatees? How is a spinning prop going to save them when ITS STILL SPINNING like a regular prop is it gunna have the ability to falay it better.😂
I love complex mechanical engineering. When I was a kid I used to take old things apart just to see how they worked. Guess that's why I'm so good at repairing boilers now.
I think that reliability and maintenance are hell with such a complex system and both are the most important thing to both
Fire tube or water tube? I used to work at a chemical company as a millwright and ran our mechanical integrity program. We had several different boilers ranging from 50# to 800#. One of the few licensed to burn formaldehyde. I miss a lot of things about the job but I don't care if I never see the inside of a mud drum again. Some of the ones that didn't burn gas had some pretty gnarly fire boxes too.
@@stevehensley5096 gas to water usually now but I've done pretty much everything in my time.
Back in my day we just used a sail 🤪🤪🤪
Back in my day we used a long stick
Sail power is free, but slow. In order to increase speed, this Is necessary
Back in the days we just use rowing Oars!
МОЛДЦЫ ИНЖИНЕРЫ, КОНСТРУКТОРЫ, ОЧЕНЬ ЗДОРОВО ПРИДУМАЛИ.!!!!.
Инженеры конечно молодцы, но насколько надёжна такая конструкция, в сравнении с обычным винтом? И насколько неприхотлива в обслуживании?
100% of the engine power??? 🤔
i came to the comments to see how many would comment on that 😂
@@ayg2199 I heard it and I was like "wtf." It's like my guy, that's physically impossible
My question is why don’t we see this on more ships, as this gives power and efficiency, which both the military and shipping need respectively?
It is the combination. Counter rotation is really not that bad. Really you just need a shaft going through a shaft and the the drive shift has 2 gears, but the first gear makes contact with the gear from the outside shaft and the second gear goes past the gear for the inside shaft and runs on the far side of the gear so it spins the other way. Variable pitch requires something like shift fork in a manual transmission. That pushes another shaft forward and back that is geared to all the blades. Now you have 3 shafts, and far more gears.
Personally I think we need more work on new props like a toroidal prop. You could not reverse it and I do not think adding a counter rotating one would help and it would make the shaft stick out quite a bit farther. I'm also not sure if a transmission would help. Usually boats have one gear only and are controlled by the RPM of the shaft and gain most of their efficiency by planning.
A toroidal prop gains their efficacy by reducing cavitation that rob power that normally happens as the prop increases in speed. They already show it is quieter and increase efficiency at cruising speed. The boat likely does not go much faster but it burns something like 20% less fuel.
I don't believe the channel owner reads comments anymore.
@@JennaHasm No, but other people do.
I try to read comments on all new videos.. Boring out the outer shafts and the problems of mounting the inner shaft bearings were not considered to be justified for increase in efficiency (in times of relatively cheap fuel) but there were some larger cargo ships in the 90's that utilized contra-rotating. If you can build it cheap with AM then there could be a case for it. I believe Sharrow is is making a toroidal but it's extremely expensive and more competitors need to come out. I appreciate the feedback!
The cost isn't justifiable.
@@toddabbott781 I just saw your comment. It wasn't in my notifications.
👍 Wonderful machine designing. We highly appreciate your effort and time. Thank you.
Thank you, now I want to become a propeller ✌️
Most advanced?
No, it's the most complicated, which isn't always a good thing.
I totally agree, it is not the most advanced. But I don’t think it’s the most complicated either. I think they’ve nailed it with the newest props. They are coming out with and I cannot imagine boats being made any other way unless they’re willing to pay the licensing fee Needed to put one on their motors.
@@canopybreezesoutdoors4916what if there were a type of under water jet turbine ?
@@caelonmiller1957 LOL 😂
Wait a minute wouldn’t a jet ski engine be just that?
@@caelonmiller1957 Wait you were serious? 🤣
nothing new about this, pitch changing blades and counter rotation have been around for many years.
afaik they didn't state it was new, just that it was advanced.
@@Bomkz A Swiss clock from the 19 century is more advanced mechanically!
@@ericdelevinquiere9902 in different ways yeah, the same way a modern car engine and computer are advanced, you can argue one is more advanced than the other, but it's all pretty darn impressive it works reliably at all.
BRB, I need to change my pants.
Ive been building and repairing propellers since 1996. The number of propellers ive repaired over the years is in the thousands. Ive seen a grand total of zero CPP Duo-Props. Ive worked on little tiny SeaDoo impelers all the way up to 36 foot Diameter container ship propellers.
Please show the mechanism
No, that is what is protected by its patent. The mechanism is the real product, it can be reverse engineered from certain photos so they just don’t show it. It’s exactly why if you see a submarine in dry dock its prop is all covered up, for people taking video footage as well as the vast majority of the workers are not privy to such classifications.
@@thingsnexttome Wow thanks for telling my I’m really stupid for not knowing that
@@thingsnexttome If it has a patent, the mechanism is already public. Patents require you to disclose how it works.
Looks expensive, must be for a military application.
We use this in the salmon fishing industry. You can reverse without slowing the shaft
Does it automatically change pitch to optimize efficient at all speeds?
That is amazing! I wonder the stats. Have to look it up.
It’ll break.
I'm curious as to what kind of designs a high will come up with that are as efficient as possible. It'll probably look scarily organic.
You gotta take a minute and picture how it works. Amazing stuff
Wind turbines should be made like this as they'll make more electricity. Even the Mars Ingenuity helicopter uses similar contra rotating blades.
Nuclear, just don't let the third world countries like thee former USSR have them and we can make more energy than we could imagine with a miniscule amount of waste and space needed.
Why do they rotate in opposite directions? What advantage does it have? Noob here.
the more the better
twice the spining so twice the speeeeed
The torque each one generates cancels each other out and makes things more balanced. Think about a helicopter - you need the tail fan to balance out the torque of its main rotor. There are helicopters with two stacked main rotors that spin in opposite directions and they don’t need a tail fan because of it.
Also eliminates prop walk essentially the sideways paddle effect of the prop
As retired engineers ( toolmakers) this is a pieces of marvel mechancialism , accurate nature beautifully
The propeller is on a plane, this is better known as a "screw" on a boat. 😊
The main thing counter rotating props do is minimize torque. They are not necessarily more efficient as one propeller is totating in the wash of the prop in front of it
There is a lot of evidence that toroidal props are more efficient than regular props.
What about contrarotating toroidals (counter rotating usually refers to non-coaxial configurations, like a twin prop)?
Mmm, yes. They spin.
Thats just 1 manatee away from needing adjustments.
It's amazing that the human race went from banging rocks together to building stuff like this
😒
EDIT ALL U LIKE..ULTIMATELY YOU LOSE YOU TUBE EDITERS,
SORRY For Ewe('s)
Boy Ya'll Must Be Qwik Though..grant u That..Stayed Up Total of What 45 Seconds..
Pathetic Indeed!
If They Disagree With Your justifiable Views..poof Watch Erase You in a Heartbeat..
Now Who's Being Honest& "Fair".. Sure Isn't The Y.T.editors& Their Algorythms.
High Tech. Censorship!!
Pathetic!!
Wow Allowed Up for less Than a min. Took it Down..Then Put it Back up Again..After my Complaining About Censorship..?
Truely Amazed.
I don't know If It's Worth Our Time Anymore??
Life's Too Short& There's Other Avenues Of Coms.2Explore!!😮😊
Ummmm toroidal props are the most advanced right now with super high efficiency. Not as complex but still more advanced and better.
Those are less efficient because they don't have variable pitch
@@iamgood5544 Wrong. They are more efficient because they dont have the loss of energy from the edge of the prop that these types still have and having variable pitch does not fix that problem.
Ok
@@macmac1022 toroidal props are only efficient at very high rmp(speed) which is good for small high speed boats where it is most used but useless for large vessels which operate at low speed and are very difficult to make in large sizes.
Hit a rock or piece of floating wood and you have a $10,000 repair .
Ten grand wouldn't come close but it's a SUBMARINE propeller.
Винт : нет ришотки .. что поподет на Нево ..покрамсает .. ♒🤿🤕🕸️в шурму ..
Let me guess... 25,000 bucks
And that's the trawler drive.
The engineer in me loves it. The repairman in me hates it.
Such an old idea
That's already used in big ship long time ago , I know that because I'd been working on the ships for 28 years from machinists to 2nd Engineer , We call on the ship as propeller pich ITS NO MORE ADVANCE ITS 50 YRS AGO OR MORE BEEN USED ON THE BIG SHIP , NO LONGER NEW TO ME., IT USED HYDRAULIC OIL AS MEDIUM TO MOVED THE PROPELLER MOVED FORWARD AND ASTERN WITH THE USED OF HYDRAULIC PUMPS
He never said it was new lmao
Covered with a logarithmic casing made of prefamulated amulite
now with a turbo encabulator
The screws holding those propellers look super advanced. Top quality Chinese steel.
🙏 Respect & Salute to the inventors of this remarkable propeller system! 🌷🌿🌏💜🕊
Sure would hate to hit a rock with that!!!
Plane guys : *took you guys enough*
Damn, I'll have to put this on my 105,000 dollar Bass Boat !
I'm kind of surprised that more high-end boats don't use this type of technology to save gas and get better performance. It does look seriously expensive.
these only efficient at high rpm(speed) only and are extremely expensive to manufacture and maintain so it doesn't make sense to use it on civilian vessels, they are only used in military vessels and torpedos.
That feat of engineering is absolutely insane yet gorgeous
If the Titanic had this then Jack would have lived.
That's why torpedoes had those props old school AWSOME
100 percent of engine power or shaft power?
Imagine counter-rotating Sharrow props by VEEM. Holy shit that would be a work of art.
Very very nice .. looks like a rc boat set up .. bet it would do well on a cigar boat
I have zero idea what you’re saying and what it means, but that thing is Satisfaction 100 to watch
Aviation: are we a joke to you?
Oh that's beautiful. I want to 3D print one.
These are a great setup.
What would be interesting to see is an experiment using the variable pitch on each blade individually. Would almost certainly decrease the efficiency of the overall propeller performance though but what if there’s a configuration of each blade being at a different pitch that results in the most efficient propeller never before seen
Very elegant design!
I would like to see the internal workings of this prop system to see how the actual adjustment for each blade is maneuvered with the mechanical gears inside of the shaft or housing of this propeller
That same concept is how helicopters maintain the same power at all times while collectively changing the amount of pitch to lift, hover and/or descend.
Such an informative video. Thank you!
I’d like to see an animation how it works in the water. That is a badass piece of engineering!
from wooden wheels to that in less than 100 years , seriously the 20 th century engineers were bad ass
Nice CRP + CPP solution. For bigger ones you should check Steerprop CRP solutions where this technology is scaled up to 15 MW size
Can prop angle be adjusted while in use? and what are the inches per rotation measures? Thanks
What’s it like against sonar and radar frequencies?
I always thought that I should develop this type of prop as a kid
Thank you, do you have knowledge about rim propeller?
Thanks, I covered it awhile back for thrusters but can cover some newer propulsion if you want.
@@Tech_Planet
I enjoy and benefit from your scientific clips and lessons. It would be an enrichment for the channel if you presented this topic to us in your own way. I think that observers and researchers will also benefit.
What an awesome invention....🔥🔥🔥🔥🔥
Totally cool! 😎 Thumbs up, and I want to learn more about this. 👍🏻😎
Nothing like 100 extra things to go wrong.
K.I.S.S.
Four such propellers in ship build could create some more continually history and submarine building using jet engines of highest power propulsion of level 7
Piston-engined aircraft that have more than 180 hp must have a variable pitch propeller to increase efficiency and also so the prop tips dont break the sound barrier.
Ok, I was only referring to modern aircraft today.
And I said it was over 180 HP not 150 HP.
Bravo..beautifully done.
Ring of planetary gears in front of and behind the propeller at the base and the one at the tip just has one ring of them near the cap and then the cap is essentially a drive axle that sandwiches everything together at least that’s what I think
An inside view would be great
Design and efficiency is right on target
nice, would be nice to see it underwater spinning to visualize how the water moves
This is soooo awesome
While I was going to cite the rhe Russian bear with it's,dual contra-rotating props, it seems a learned colleague did a fine job of detailing this aircraft.
I would like to add. That the bear is the FASTEST propeller driven aircraft ever.
It speed is around 575 mph!!!
However-it beats it's crews badly & and is SO loud....
I wouldn't want to be a crewman.....
This "novelty" predates WW2.
Volvo had this type of Duo-Prop but their
This is great engineering!!
Props for the video
I know a guy who has this on his sailboat drive. Cool engineering