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Ferry interesting propulsion development

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AndrewE

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https://www.bbc.co.uk/news/articles/cm2j84l849no (Ferry powered by 'curved ball' physics set to sail) looks like the old Flettner rotor
A new ship with high-tech sails which harness the same wind power that makes a "curve ball" in football is going into service in Lancashire.
The Stena freight ferry is equipped with towers called rotor sails which compress and thin air to create thrust to power the vessel - the same process that makes a football spin.
Stena Line said it would make a significant contribution to its goal of reducing CO2 emissions by 30%.
The ship will go into service between Heysham and Belfast on Friday.
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Pegpilot

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Very interesting. But Viking Grace entered service 13 years ago with Flettners, so not that innovative, eh ? Last time I saw a Flettner-equipped vessel was near Bergen - it had rotor sails that could be folded down near-flush with the deck - good news if you're regularly running under bridges ! Which reminds me, I'm teaching principles of flight tomorrow and need to brush up on Bernoullie theory.
 
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