Talk:Turbosail

Untitled

I created this page when I found, to my surprise, that Wikipedia didn't have an article on turbosails. Unfortunately, I am not in possession of a great deal of verifiable or referrable sources about turbosails. I know only what I could glean from the internet (the Cousteau site and elsewhere). If anyone has some better references, or a better understanding of how the device works, I would love to see them make it into this article. I understand that it functions similar to and aircraft wing - by reducing the pressure on one side of the tube, it changes the path of air flowing around the tube and generates lift. But I admit I'm a little fuzzy on the details - or whether this thing even works. Some of the sources I found online suggest it had little positive impact on fuel economy, Cousteau propaganda notwithstanding.

One more thing: there's a french wikipedia article on this (turbovoile) - if anyone speaks french and can translate, that might be a great place to start.

Joachim Heck 03:47, 27 May 2006 (UTC)

The French article is a self-contradicting piece of crap. Rama 09:06, 28 February 2007 (UTC)

Just reminding everyone to update this article —Preceding unsigned comment added by 58.111.120.240 (talk) 06:25, 21 September 2007 (UTC)

"When compared to the thrust coefficient of the best sails ever built (Marconi or square types, i.e. ships of the American Cup or the Japanese wind propulsion system) that of the Turbosail is 3.5 to 4 times superior and gives the system a unique advantage for the economical propulsion. This figure is the result of research on the Alcyone."

This figure sounds very much like wishful thinking in view of the remarkable success this rig has enjoyed since its invention. —Preceding unsigned comment added by 80.132.209.36 (talk) 12:43, 14 September 2010 (UTC)

Rotor ship

Would anyone be up to collaborating on merging this with Rotor ship? It's confusing to find there are separate articles that cover many of the same concepts. Also, Alcyone (ship) is quite stubby and should probably be merged. Doceddi (talk) 09:44, 8 August 2012 (UTC)

First thing would be to tag it, which I've now done. Andy Dingley (talk) 09:59, 8 August 2012 (UTC)

• oppose Turbosails use an internal airflow, rather than the rotation of the Flettner rotor system. Despite looking outwardly similar, they're too different to merge into the same article. Andy Dingley (talk) 10:03, 8 August 2012 (UTC)

ok! you should totally rewrite the opening paragraph then, please, because that's not what it says at all. Doceddi (talk) 21:09, 10 August 2012 (UTC)

• Support (Alcyone to Turbosail) Alcyone could be merged to turbosail (preserving a redirect, to allow categorization) as that would place coverage of the ship and its mechanism in one place which, at this scale, would be more readable. Andy Dingley (talk) 10:03, 8 August 2012 (UTC)

• oppose - the rotorship uses a spinning tube to generate Magnus effect, while the turbosail uses a fixed augumented lift airfoil - two different concepts entirely, even in the unlikely event that there was any inspirational transferrance (more likely the latter was inspired by developments in aircraft aerodynamics).NiD.29 (talk) 23:50, 17 August 2012 (UTC)

• oppose - Based on the design and principles, it is obvious that Turbosails and rotor sails are two different types of ships. Faragona (talk) 12:28, 13 June 2013 (UTC)

• oppose - The concepts are fundamentally different in operation and design. They do not belong on the same entry. TasRNW (talk) 12:28, 6 June 2014 (UTC)

I have removed the merge request from rotor ship per the above discussion. The merge request from Alcyone (ship) still needs to be decided. Regards, HaeB (talk) 13:38, 20 June 2014 (UTC)

intrados and extrados

WTF?

It consists of an airfoil, vertical and grossly ovoidal tube, with a mobile flap which improves the separation between the intrados and extrados. An aspiration system pulls air into the tubes, and is used to increase the depression on one side of the sail; a reaction force occurs as the result of the pressure difference. In this way, the sails act as wings, creating both lift and drag.

I found the passage, above, clear as mud. Intrados redirects to arch, and extrados redirects to Voussoir, a french term for a component of an arch. Reading about arches doesn't help understand this article.

However this RS uses intrados and extrados to refer to the inner and outer areas of a curved pipe or duct. when a fluid flows around the elbow of a pipe with a curve there is lower pressure along the outer surface of the elbow and higher pressure of the elbow.

This article REALLY NEEDS A CROSS SECTIONAL DRAWING. I think it would show slits where the edges of spiral airfoils overlap.

I think the article is saying an external powered fan sucks air through these slits, which causes the vertical chimney to rotate, and, because it is rotating, it generate lift on one side of the chimney...

Is this what the article is trying to say? Geo Swan (talk) 23:10, 5 April 2019 (UTC)