There is historical evidence showing that Archimedes created toroidal propellers in 200 BC Traditional propellers, which have multiple blades, are used to move a vehicle through a fluid such as a liquid or a gas such as air. Until this time, propellers were always open-bladed and had very similar shapes, but toroidal blades have blades that form a circle that closes in two different planes, or as if they were bent in half.
Propeller design has hardly changed in over a century, despite decades of research to increase the efficiency of aviation and marine engines. until various government agencies and private companies have begun testing Archimedes’ invention. With operational invisibility being one of its main advantages, the result is spectacular and has the potential to significantly disrupt maritime navigation, as well as the growing drone market. It also improves performance by using less power.
Two research specialties.
Car and Driver
The “twisted” propellers created by the Sharrow Marine company have advantages such as 50% more reverse thrust, 30% more reach, less vibration and twice the speed at the same midrange RPM. However, as you can see in this video, the most noticeable benefit is noise reduction when comparing the same boat, with the same engine and conventional or toroidal propellers. These propellers are already available on the market for some boats, but the company is still working to increase the range of boats that can use this type of rotor.
Instead, using 3D printing, a group of researchers at MIT in Massachusetts produced numerous prototype drone propellers with enclosed, twisted designs. As a result, the drone’s flight motion now sounds like a distant hiss instead of the annoying buzz it did in the past, which is an amazing noise reduction. Even though these drone toroidal propellers are still in the experimental stage, most likely they could go into mass production in a short period of time and be used for a variety of tasks including aerial delivery services, filming, inspections of agricultural and industrial facilities. , and any other activity. Present or future of drones.
