The MIT observation team empirically found the shape of a toroidal screw that creates the lowest sound volume at frequencies of 1-5 kHz. This is the most sensitive human habast – at such frequencies, pacht madenza and whizzzzzh The latter became the stim of speech
A toroidal propeller has blades in the form of a closed circle, curved in two planes. Variations in this mass design, optimal bending parameters have yet to be found. The main thing is that such blades have no beginning and end, because it moves up. Because of this, there is no tension at the ends of the blades, the action of their parts with the air weave is the same everywhere, p p p
Experienced samples of toroidal propellers n esco r rr rr rr. Even better, toroidal blades guide themselves into boat rifles, where noise stabilization, stabilization of the movement of water flows through the propeller, is revealed. The boat lifts a little above the water, the friction is US – this is how fuel savings of an incredible 20% are achieved.
The downside is obvious: such a complex speed of development of production and it will cost a lot. For example, the Sharow Marine company produces toroidal propellers for motorized propellers. And t t t the full potential of 3D printing can be unlocked, which will make it possible to reduce the cost of production of t l
Source: Tech Cult
