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Hi,
here is a better views to an old cyclogyros.
http://www.homepages.ed.ac.uk/shs/Climatechange/Flettner%20ship/Seifert%20Flettner%20apps.pdf
here is a better views to an old cyclogyros.
http://www.homepages.ed.ac.uk/shs/Climatechange/Flettner%20ship/Seifert%20Flettner%20apps.pdf