These strangely-shaped twisted-toroid propellers look like a revolutionary (sorry) advance for the aviation and marine sectors. Radically quieter than traditional propellers in both air and water, they're also showing some huge efficiency gains.
These strangely-shaped twisted-toroid propellers look like a revolutionary (sorry) advance for the aviation and marine sectors. Radically quieter than traditional propellers in both air and water, they're also showing some huge efficiency gains.
For that price it should come with an alternator!This type seems similar to me.
https://www.bestnest.com/mobile/RTP...MI6cPwpLLq_AIVAzetBh36pgBzEAQYAiABEgJQt_D_BwE
If they increase efficiency of boats and planes and being the principle of reciprocity, could they also result in higher efficiencies going the opposite direction, that is for wind turbines?
Ian and me were thinking the same thing ... and what's more, wind turbines' noise is an outstanding annoyance. So this tech might make them quieter too ... the one thing to consider is going to be the cost of manufacturing the blades. But I'm sure these guys are already on it, and it's just a matter of time for us to hear news about it.If they increase efficiency of boats and planes and being the principle of reciprocity, could they also result in higher efficiencies going the opposite direction, that is for wind turbines?
Looks different to me.That doesn't look much different than the screw on a submarine. This picture is an older one, I'm sure they've made improvements.
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In Marine Prop speak, it is called cupping. They have been cupping marine propellers for decades before any winglets ever appeared. Cupping not only increases energy transfer but also prevents cavitation slippage upon heavy full throttle accelerations from a standing start. Something not wanted when trying to pull up a couple of water skiers from a standing start or when pushing a heavy tow up the Mississippi River. The long-curved blade design was also instrumental in reducing propeller cavitation noise and increasing energy transfer on submarines and tow boats long before aeronautical winglets.Interestingly, a lot of this efficiency increase and noise reduction came from an extreme evolution of the "winglet" added to the ends of airplane wings
There is a entire navy department for designing the most efficient and quiet marine propellers for boats, ships and underwater weapons.That doesn't look much different than the screw on a submarine. This picture is an older one, I'm sure they've made improvements.
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by Jake Hertz
by Jake Hertz
by Jake Hertz
by Jake Hertz