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  #421  
Old 03-07-2017, 04:33 PM
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rwatson rwatson is offline
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Quote:
Originally Posted by DougCim View Post
Without going into any simple reasoning, I am fairly certain that adding rigid wing-type sails would do more than these spin-tube things do.

In particular, the notion of adding a "motorized" sail to save fuel seems rather odd.
~

Nope. They dont. They produce far more propulsion
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  #422  
Old 03-07-2017, 08:21 PM
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Absolutely brilliant. Is it just me though, or am I the only one tempted to sit and spin on the top of one of those rotors?

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  #423  
Old 03-08-2017, 06:36 AM
1J1 1J1 is offline
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  #424  
Old 03-08-2017, 10:30 AM
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Looks like a fun project. You could swap out the mast on any RC sailboat for a rotor to try this out. Very interesting project. Thanks for sharing!
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  #425  
Old 03-15-2017, 04:36 PM
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Planned Rotor Tanker

Maersk Press Release
http://splash247.com/rotor-sails-ins...maersk-tanker/
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Everything Old is new again - Flettner Rotor Ship is launched-maersk_tanker_splash_247.png  
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  #426  
Old 03-15-2017, 04:53 PM
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Ferry "Viking Grace" Planned Retrofit with Rotor

"Preparations for the retrofit are underway, with the installation scheduled to take place during the second quarter of 2018, Norsepower said.

Viking Grace will be retrofitted with one medium-sized Norsepower Rotor Sail unit that is 24 meters in height and 4 meters in diameter, becoming the first-ever global LNG/wind electric propulsion hybrid ship."

"In 2015, Norsepower and Bore reported a successful sea trial of Rotor Sail Solution, with two small units of the system installed on board Bore’s M/S Estraden, a 9,700 dwt roll-on/roll-off (RoRo) carrier. Measured and verified by NAPA, a maritime data analysis, software and services provider, Rotor Sail Solution delivered fuel consumption reductions of 6.1% for Estraden, Norsepower informed."

5% savings on the Estraden with these two little cylinders is pretty impressive
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Everything Old is new again - Flettner Rotor Ship is launched-vikgrace.png  Everything Old is new again - Flettner Rotor Ship is launched-rotor-sail-installation-crane-rs.jpg  
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Last edited by rwatson : 03-15-2017 at 04:57 PM. Reason: extra photo
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  #427  
Old 03-16-2017, 03:38 AM
1J1 1J1 is offline
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Originally Posted by rwatson View Post
http://www.motorship.com/news101/eng...er-rotor-trial

"The project represents the first installation of Flettner rotors on a product tanker, and will involve two 30m tall rotors fitted to a 109,647 dwt LR2 vessel between mid-2018 and the end of 2019. The project partners anticipate fuel consumption savings of 7-10% on typical global shipping routes."
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  #428  
Old 03-16-2017, 04:29 PM
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Originally Posted by 1J1 View Post
http://www.motorship.com/news101/eng...er-rotor-trial

"The project represents the first installation of Flettner rotors on a product tanker, and will involve two 30m tall rotors fitted to a 109,647 dwt LR2 vessel between mid-2018 and the end of 2019. The project partners anticipate fuel consumption savings of 7-10% on typical global shipping routes."
and I noticed

"The Norsepower rotor sail, made from lightweight composites, is an updated version of the Flettner rotor, which uses the Magnus effect around a spinning cylinder to harness wind power to propel a ship.


The project is the third part of an ETI initiative to further development in fuel saving technologies. As reported, the organisation has also funded projects to research, develop and test waste heat recovery systems, with AVID Technology and Royston, and to develop a highly efficient propulsion system (comprising propeller, rudder and pre- or post-swirl devices) with Teignbridge Propellers International."
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  #429  
Old 03-28-2017, 06:41 AM
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Just stumbled across this Popular Science article, dated 1984: https://books.google.it/books?id=eAA...page&q&f=false (see the page 70)

Everything Old is new again - Flettner Rotor Ship is launched-popscicover.jpg
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  #430  
Old 03-28-2017, 01:10 PM
kerosene kerosene is offline
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Does anyone that mean that our houshold robot and flying car are about to become reality too?
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  #431  
Old 03-28-2017, 04:12 PM
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Originally Posted by daiquiri View Post
Just stumbled across this Popular Science article, dated 1984: https://books.google.it/books?id=eAA...page&q&f=false (see the page 70)

Attachment 112672
Well done.

I actually had to scan and copy the pages from my personal copy way back in the early part of the thread because I couldnt find it online.

Probably one of the better articles one the practicalities of the concept, as it actually goes into the economics of the exercise.

I wonder what became of the boat ?
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Last edited by rwatson : 03-28-2017 at 04:15 PM. Reason: spelling
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  #432  
Old Yesterday, 12:39 PM
alan craig alan craig is offline
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Daiquiri, that Pop. Science magazine was so good I read almost all of it!
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  #433  
Old Today, 03:09 AM
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Originally Posted by alan craig View Post
Daiquiri, that Pop. Science magazine was so good I read almost all of it!
Yeah it was an interesting read, but most of articles and ads are technically way outdated.
Sure it brought back the taste of 80s, which I occasionally liked - but mostly didn't. I am not a kind of guy who likes to look back, so nostalgic readings and old pics hardly catch on with me.
Cheers
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