Komen de zeilen weer terug aan boord?

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Sparks316
Berichten: 476
Lid geworden op: 23 aug 2018 10:25
Locatie: Oss

Re: Komen de zeilen weer terug aan boord?

Bericht door Sparks316 »

Hadden wij niet al rond 80 jaar geleden stoomloggers met een hulpzeil achterop? Die zag je nog wel in de jaren 60, die hulpzeilen.
Zoals gewoonlijk rennen we gewoon in cirkeltjes rond. En nieuwe uitvindingen? Net nu biomassa-centrales als knijnen uit de grond schieten, blijken ze weer niet goed te zijn i.v.m. het stikstofprobleem :mrgreen:
Laten we gewoon maar weer gaan roeien. No problems at all :lol:
Louis


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leo-shof
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Lid geworden op: 23 dec 2006 21:05
Locatie: 0174

Re: Komen de zeilen weer terug aan boord?

Bericht door leo-shof »

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Zoiets Louis ? :lol:
Het slechtste wiel van de wagen kraakt het meest . :roll:

LEO

ruudsijmons
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Lid geworden op: 05 jan 2007 22:10
Locatie: ede

Re: Komen de zeilen weer terug aan boord?

Bericht door ruudsijmons »

hey hey roeien prima

ik hoop dat ik het goed schrijf Fleming patent bijv

kan je de sportscholen ook opdoeken

ruud sijmons

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A.Kuiper/J.Pessoa/BR
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Re: Komen de zeilen weer terug aan boord?

Bericht door A.Kuiper/J.Pessoa/BR »

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A.Kuiper/J.Pessoa/BR
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Re: Komen de zeilen weer terug aan boord?

Bericht door A.Kuiper/J.Pessoa/BR »

Zweden met de nieuwste plannen voor een zeilend vrachtschip (car carrier)
+
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A.Kuiper/J.Pessoa/BR
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Re: Komen de zeilen weer terug aan boord?

Bericht door A.Kuiper/J.Pessoa/BR »

Sweden's new car carrier is the world's largest wind-powered vessel
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(CNN) — Oceanbird might look like a ship of the future, but it harks back to ancient maritime history -- because it's powered by the wind.
The transatlantic car carrier is being designed by Wallenius Marine, a Swedish shipbuilder, with support from the Swedish government and several research institutions.
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With capacity for 7,000 vehicles, the 650 foot-long vessel is a similar size to conventional car carriers, but it will look radically different. The ship's hull is topped by five telescopic "wing sails," each 260 feet tall. Capable of rotating 360 degrees without touching each other, the sails can be retracted to 195 feet in order to clear bridges or withstand rough weather.
The sails, which will be made of steel and composite materials, need to be this size to generate enough propulsive power for the 35,000-ton ship.
Although "the general principles of solid wing sails is not new," designing the Oceanbird's sails has been a challenge, says Mikael Razola, a naval architect and research project manager for Oceanbird at Wallenius Marine.

The telescopic "wing sails" of Oceanbird will be the tallest ever built.
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That's because these are the tallest ship sails that have ever been constructed. "This ship, at the top of the mast, will be more than 100 meters (328 feet) above the water surface," says Razola. "When you move up into the sky that much, wind direction and velocity change quite a lot."
To better understand the atmospheric conditions at this height, Wallenius mounted sensors on top of its existing vessels, while they were crossing the Atlantic, and gathered data on wind velocity and veer (a clockwise change in wind direction), up to 650 feet above sea level. "All of this information has helped us design an efficient wing and hull system, that can make the most of the power available in the wind," says Razola.
Cleaning up a dirty industry
Crucial elements in the global automotive trade, oceangoing car carriers are known as RoRo -- the name derives from "roll on, roll off." Rather than loading vehicles with cranes, which would be slow and inefficient, vehicles are rolled along ramps built into the ship.
Large, conventional RoRo use an average of 40 tons of fuel per day, generating 120 tons of CO2 -- equivalent to driving a car 270,000 miles.
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The shipping industry is under pressure to reduce emissions of CO2 and other greenhouse gases. Shipping accounted for 2.89% of global manmade greenhouse gas emissions in 2018, according to the International Maritime Organization (IMO), the UN body that regulates global shipping. In the same year, the IMO introduced a mandatory 50% reduction of total annual greenhouse gas emissions by 2050 — with the ambition to reach zero emissions "as soon as possible in this century."
Oceanbird is designed to exceed these targets -- Wallenius says the ship will emit 90% less CO2 than conventional car carriers. It won't be completely emission-free, however, because it will still rely on engines for manoeuvring in and out of ports and for emergencies.
Slow sailing
With a projected top speed of about 10 knots, Oceanbird will be slower than standard car carriers, which can travel at 17 knots. It will take around 12 days, instead of the standard seven, to cross the Atlantic.
This long journey will require some scheduling changes, says Razola, as well as acceptance from carmakers. "Of course, there will be challenges and we won't be able to do things exactly as we're doing them today, but the response so far from manufacturers has been very positive," he says.

An indoor tank at SSPA, another instituion working on Oceanbird, where a model is being tested with artificial wind and waves.
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Jakob Kuttenkeuler, a professor at Stockholm's Royal Institute of Technology -- one of the project's collaborators -- is also optimistic. "People are environmentally informed enough now that we think there will be customers willing to put their cars on a ship that goes roughly half as fast as today's ship, if we can make it carbon neutral," he says.
Kuttenkeuler and his team are working with Wallenius on performance and aerodynamics calculations, using weather data to simulate realistic sailing conditions. They have built a 7-meter model of Oceanbird which will sail in Stockholm's archipelago, later this year, to gather data that will help finalize the ship's design.
Razola says it will take around three years, after that, to launch the full-size version. "Our ambition is to see Oceanbird sailing in 2024."

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jdbvos
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Lid geworden op: 22 apr 2006 16:17
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Re: Komen de zeilen weer terug aan boord?

Bericht door jdbvos »

Met de cijfers-vergelijking op plaatje cnn-3 mag wat mij betreft het zeilen worden her-ingevoerd...
Cardanisch opgehangen kooien zodat je wel horizontaal kunt maffen, en gáán met die windhapper !
Oost, west...ook best

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Leo Bokkum
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Lid geworden op: 15 dec 2006 05:30
Locatie: Oost Drenthe

Re: Komen de zeilen weer terug aan boord?

Bericht door Leo Bokkum »

Wel mooi die zeilen, en aan de langere omlooptijd valt door leveranciers/ontvangers ook wel een mouw te passen. Als je de orders voor die auto's eerder de deur uit doet, komen ze ook "just in time" aan.
Wanneer de hoeveelheid vervoerde auto's echter hetzelfde blijft, zullen er wel bijna 2X zoveel zeilschepen moeten komen dan er nu motorschepen varen.

De geleerde heren zullen het in hun computertjes waarschijnlijk aardig uitgerekend hebben, maar mijn ervaring met zeezeilen bestaat toch voornamelijk uit "te veel wind, te weinig wind of wind uit de verkeerde hoek". Die 3 tot 12 ton per dag neem ik dan ook met een aardig zakje sceptisch zout.
Maar er zal vast wel ergens een scheepje met subsidiegeld liggen om eventuele fiasco's met ons belastinggeld af te dekken. :roll:
Pas geen oplossingen toe voordat je weet wat het probleem is

Geep
Berichten: 730
Lid geworden op: 07 apr 2012 18:49

Re: Komen de zeilen weer terug aan boord?

Bericht door Geep »

Jagen, wrikken en roeispanen, + slaven!
Vrgr. Geep.



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