A recent development in wind turbines.
A recent development in water impellers.
The Archimedes screw, not a golden ratio but can be adapted as such.
A ship impeller using the golden ratio.
Victor Shauberger inspired implosion propeller. Yes I know psuedoscience.. deal with it.
Egyptian impeller? You decide on that one guy.
I will turn this on it's head and attempt to use it to produce a low pressure zone over a wing and to provide propulsion.
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