Introducing the revolutionary ABB Dynafin™ - the latest propulsion innovation by ABB

[@MrTorlob]

This is a Voith-Schneider propeller, invented in 1920, and successfully commercialized by Voith to this day. There are thousands in operation, great propeller! Imitation is the highest form of flattery, but presenting a 100 years old invention as an ABB invention is disappointing.

[@ClaudeSammut]

You are certainly right but what I understand is different is the field of application and execution. The Voith-Schneider is mainly for vessels that require to keep their position such as tugs while the ABB is intended for moving vessels, in fact the example with passenger ships was given. Second difference I understood was that the ABB is magnetic while the Voith-Schneider is mechanical. Of course this is what I understood from this video and not something official.

[@gorgaar]

@@ClaudeSammut Voith has marketed its Voith Schneider Propellers (VSP) for passenger ships such as yachts for their efficiency and silent operation. There have been several concepts but it didn't find adoption outside of small tug boats and large offshore vessels. Voith also has developed an electric version named eVSP a couple of years ago. I think the main difference is that ABB's cyclorotor also drives the individual blades electrically, while the Voith eVSP only uses electric drive for the disc and a mechanical (kinematic) system for the blades. Overall I like ABB's fully electric approach, however the marketing leaves a sour taste. ABB was surely not originally "inspired" by revolutionary whale motion, but by more than 100 years of cyclorotor design of a competitor and thought it can incrementally improve on it.

[@mik2137]

ABB clearly stated in the presentation that the technology is known since 100 years! They're NOT claiming that it is something knew, but they offer a version with advanced and individual blade control, 100% electrified. 👍🏻

[@rainbowdan8]

The Voith-Scneider PU was used on the Isle of Wight vehicle ferries built in 1973. It was not limited to tug boats. The unit was driven by a constant speed diesel engine and the angle of attack controlled by four hydraulic servos.

[@robertbiegler4815]

The leading edges of a Voith-Schneider propeller's blades always point in the direction of rotation. So if you want to avoid a blade going backwards through the water, the tangential speed needs to be the same or greater than the speed through the water. Therefore on the side where rotation is in the direction of travel, the blades go through the water at least twice as fast as the vessel travels. If you want to avoid cavitation, which reduces efficiency, eats up foils and sets in around 50 knots, then you must limit the speed of the vessel to around 25 knots. No problem if you want high thrust and low speed, as in a tug. But if you want to go fast, then you have that early cavitation limit. And the fast rotation needed to prevent flow reversal over the blades also means that there is no point in making large and lightly loaded blades, which is useful for reducing noise that interferes with marine life. The animations from 5:25 on consistently shows the leading edges of all blades point towards the direction of travel. The propeller can turn slowly without causing flow reversals over the blades when they retreat relative to the direction of travel. You can fit large blades without excessive drag from fast rotation, and you can go faster without the advancing blades cavitating. This all looks like a quite significant difference between the Voith-Schneider propeller and the Dynafin.

[@JohnDoe-zc1tp]

Wish they would show in action on model ...

[@chrisherd991]

A friend of the family built tugs in New Zealand that had Voith-Schneider propulsion in the late 60’s.

[@hermannwagner1376]

eine Weiterentwicklung des Voith-Schneider-Propellers von 1926, jetzt mit elektrischem Antrieb.

[@SpidersIn3rdDimension]

so an electronic VSP? They were prototyped in 1928. Used more widely in the 1930s.

[@jerrybrown4229]

Do the near vertical blades of the ABB Dynafin design have any advantages regarding entanglement if ropes or ghost fishing nets or clearance of same from the propulsion units - compared to a more traditional shaft propeller or azimuth propellor with nozzle

[@Cefity]

Truly magnificient looking technology. Hopefully it will come thru and see wide range of uses, maybe even with larger cargo ships.

[@jdray]

How far down will this scale? Does it make sense on boats less than ten meters?

[@BuddhaKat1]

What a facinating concept. I can't wait to look at the specs.

[@petercee8991]

Its not a new concept. Its a rip off of a VSP.

[@vinaykhanna7275]

Excellent. GREAT WORK.

[@heatseeker456]

This is the same as a Voith Schneider but with different blades

[@hartmutprzibilla9259]

Eine ganz alte Technologie. Kann man z. B. im Schifffahrtsmuseum in Bremerhaven gewundern.

[@evstratiosalisafakis8744]

No scale on the size of the fins. If the concept allows for more cargo to be loaded surely it will come undone if there is a port draft restriction? The complexity of the unit may also put alot of customers off.

[@skylineeeeeeful]

it's a Voith-Schneider with continuous adjustable blade pitch. Let's see if there will be a legal fight for patent rights. Anyway, presentations with a Steve Jobs wannabe, looking at the screen of his own video are not the future for sure..

[@removeheaven1550]

How far you have fallen ABB, taking 100y tech created by Voith-Schneider & presenting it as some sort of innovation

[@mik2137]

Did you even listen to the presentation? They clearly stated that the technology is known for 100 years. ABB offers now advanced and individual blade control, 100% electrified. 👍🏻

[@rakanMR]

@@mik2137 YES but this is also availble on the market so i still dont see how its new ??!!

[@jdray]

@@rakanMR, they said in the presentation that there's nothing new here. I think the innovation is in the individual management of blade pitch and the componentization of the internal system. It has a lot less mechanical linkage than the Voith system, lending to higher energy efficiency, lower maintenance costs, and ease of manufacturing. Or at least that's what I got out of this.

[@juanperez2751]

Blah blah blah....show how it works in a real model

[@lepidoptera9337]

They are showing a whale as an inspiration... but did anybody even remotely think what will happen to an actual whale AND the ship in case of a collision? No maritime operator in the world wants to lose a cargo vessel in the middle of the ocean because of such an accident that is guaranteed to happen.

[@petercee8991]

ABB has taken a VSP made a few changes and now are marketing it as a new concept. How embarrassing for Janne Pohjalainen you now have zero credibility. ..

[@jim-stacy]

Yeah ready to slice and dice and whale that is unfortunate enough to get to close

[@declan8649]

Given this system has been in use and constant development by the original voith-schneider inventor, they have found that fitted a hydrofoil below the fins increases flow rates, whilst also protecting the fragile fins and large sea mamals. Allowing the fins to spin far slower than props, fish can swim out.

[@kmac499]

5 mins of marketing bullshit before revealing a mk2 device..

[@Art-kz6zf]

Is it Batman? Is it Superman? No, it's Janne Pohjalainen!!! TADADADAAA!!!! (Was it pompous enough?) TADDDADDDADDDAAA!!! Autobots rollout! 🤖😂

[@MarkinOleg]

Честно говоря из этого рассказа и видео нихера не понял про то, как эта игрушка толкает воду. Может кто попросще объяснит а то этот финнский пареньтолково лишь про экономию тплива рассказал а всё остальноеВОДА.

[@healingworksyesjohnn]

Terrible talk no show in action just hot air