Toroidal propellers: A noise-killing game changer in air and water

Re:Toroidal propellers: A noise-killing game changer in air ... by batuhandirek on Saturday January 28, 2023 @01:22PM (#34560041)

I mean propellers are around for a long time, I cannot believe no one thought about optimizing their tip vortice energy loss.

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Re:Toroidal propellers: A noise-killing game changer in air ... by karmakaze on Saturday January 28, 2023 @01:46PM (#34560281)

This is so simple and brilliant. It's like the winglets on planes but so much more so.

Just looking at it says efficiency and power.

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Re:Toroidal propellers: A noise-killing game changer in air ... by julienfr112 on Saturday January 28, 2023 @02:13PM (#34560544)

the equivalent for plane wing would be to have two wings on each side connected like that :

---------\ | ---------/

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Re:Toroidal propellers: A noise-killing game changer in air ... by beecafe on Saturday January 28, 2023 @03:57PM (#34561773)

Those exist too! Every so often NASA tries it out.

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Re:Toroidal propellers: A noise-killing game changer in air ... by rawicki on Saturday January 28, 2023 @06:12PM (#34562990)

People do! there were many different approaches - small winglets on propeller tip, propeller with a ring, propeller in a tunnel (turbine) - and they all improve performance by a bit.

This is a next iteration, seems to be harder to simulate but improves on previous ideas.

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