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  #436  
Old 04-18-2017, 10:17 PM
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rwatson rwatson is offline
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Quote:
Originally Posted by Rurudyne View Post
And now for somemagnus completely different ....

For this use stability might be obtained by a tandem and use relative rotational speed for attitude adjustment.

The Magnus effect and the ekronoplan? My totally random thought considering that, if he realized it or not, our experimenter was forcing air under his buckets and probably deriving some lift that way. So if that makes a lot of difference what about rotors combined with surface effect? .
The lift from the 'buckets' only has to be greater than the weight of the whole plane. Actual altitude is controlled by the angle of attack and the forward thrust of the propellor. eg. An airship derives lift from the hydrogen gas, but the altitude of the zeppelin is a function of the tail fin and the propellors.

Banking is a function of ailerons , which are totally absent in a rotor wing, so pilot control would be a problem in a full size plane.

Modern F1 racers use the 'rotor' effect somewhat. The wide exposed front tyres, with the top rotating forward, creates significant downward thrust.
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  #437  
Old 04-21-2017, 09:33 AM
1J1 1J1 is offline
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Slightly old news, but found just now: plans to instal one 18m Flettner rotor on the bow of the FEHN POLLUX:

http://marigreen.eu/blog/2017/01/10/...mulator-susan/
http://fehnship.de/cms/userDocs/Pres...tor%20engl.pdf
http://www.hellenicshippingnews.com/...t-fehn-pollux/

Ship itslef: http://www.fehnship.de/index.php?tar...4&vessel_id=17
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  #438  
Old 04-27-2017, 10:22 AM
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Just found this article:

http://www.shippingwondersoftheworld...tor-ships.html

The site is interactive, so the 54 weekly parts are available for all to read. From the 1880s to 1920s, an Atlantic hazard was the presence of dismasted timber boats floating very low in the water:

http://www.shippingwondersoftheworld...ictiships.html
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  #439  
Old 04-27-2017, 05:28 PM
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Originally Posted by Pericles View Post
Just found this article:

Fantastic. It had the first photos of Flettners second Rotor ship, the Barbara, that I have seen
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Everything Old is new again - Flettner Rotor Ship is launched-barbara.jpg  
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