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What is a 'toroidal propeller' and could it change the future of drones? An expert explains
(theconversation.com)
this post was submitted on 13 Jun 2023
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Technology
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Yeah the benefits seem to be greater on the marine side...
But even then how much better they are is essentially unknown with an awful lot of drawbacks. They weigh more which is problematic for drones, are significantly more complex to manufacture and thus are more expensive.
So unless they can quantify how much better (and for those cons they need to be significantly better) I don't see this gaining any traction.
For now, they are prohibitively expensive due to the monopoly that Sharrow has with their patent. But there are other ways, such as jet ducts, to protect wildlife. But it's not so easy to retrofit a jet into an existing boat.