An article by Market News Business offers rotary sails to reduce oil tankers' fuel consumption. I am very weak on science and maths and ignorant about most things mechanical and electrical and I rely on specialists to tell me the truth. I remember over 25 years ago having a big discussion in my local pub about this exact issue, a fictional story I was reading showed a diagram of a ship that had these rotary sails fitted and it included a rough linkage system showing how the horizontal rotation could be converted to vertical rotation to drive propellers. A tool setter from a local factory explained to me it would never work. Mechanical efficiency would be lost, he said, in the conversion. The remaining power available would be too weak to turn the screws. And when you think about it, doesn't it remind you of the 1,200 K/hr hyperloop in its cranky resonance "rotary sails to drive oil tankers"? But, I could be completely wrong, maybe someone here who knows this kind of stuff will tell me it is actually feasible.
via International Skeptics Forum http://ift.tt/2n6oUxw
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