Thomas SEBASTIAN & Christopher STREM Toroidal Propeller **[rexresearch.com](http://rexresearch.com) [rexresearch1.com](http://rexresearch1.com)** --- **Thomas SEBASTIAN / Christopher STREM** **Toroidal Propeller** --- [**http://ow.ly/yWA150MkbPw****https://www.ll.mit.edu/sites/default/files/other/doc/2023-02/TVO\_Technology\_Highlight\_41\_Toroidal\_Propeller.pdf**](http://ow.ly/yWA150MkbPwhttps://www.ll.mit.edu/sites/default/files/other/doc/2023-02/TVO_Technology_Highlight_41_Toroidal_Propeller.pdf)**Toroidal Propeller** **![](2.jpg)** The toroidal propeller allows a small multirotor unpiloted aircraft, or drone, to operate more quietly than currentdrones that use propeller forms unchanged since the beginning of aviation. By enabling a drone that is less of an acoustic annoyance, this propeller may accelerate the acceptance of such aircraft for a wide range of uses a for example, aerial deliveries, cinematography, industrial or infrastructure inspections, and agricultural monitoring. **KEY FEATURES** acent Decreases signals in the frequency range to which humans are most sensitive acent Reduces noise without requiring supplementary components that add weight and increase power draw acent Lessens the likelihood that the spinning propeller will cut, catch, or clip objects or surfaces in the droneas path acent Achieves thrust comparable to that of a multirotor drone propeller acent Allows reliable fabrication with additive manufacturing techniques that make it possible to customize the propeller for various multirotor models and types Toroidal propellers were installed on a commercial drone for testing. ![](4.jpg) ![](5.jpg) --- [**https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en\_EP&FT=D&date=20190509&CC=US&NR=2019135410A1&KC=A1#**](https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en_EP&FT=D&date=20190509&CC=US&NR=2019135410A1&KC=A1#) **US10836466** **Toroidal Propeller** **[ [PDF](MITToroidProp.pdf) ]** **The propeller inclu**des a hub supporting a plurality of elongate propeller elements in which a tip of a leading propeller element curves into contact with a trailing propeller element to form a closed structure with increased stiffness and reduced acoustic signature. --- **Videos** [**https://www.youtube.com/watch?v=E8L8I0dLh\_o**](https://www.youtube.com/watch?v=E8L8I0dLh_o)**Toroidal Propeller** The toroidal propeller, one of the MIT Lincoln Laboratory's 2022 R&D 100 Awards winners, has a unique, closed-form propeller design that makes it a significantly quieter alternative to common multirotor propellers on commercial uncrewed aerial vehicles. [**https://www.youtube.com/watch?v=MGy8jvf-DZ0**](https://www.youtube.com/watch?v=MGy8jvf-DZ0)**This Genius Propeller Will Change Transport Forever** In this video we look at a new design of propellers known as toroidal propellers. These have been shown to increase efficiency, thrust, and reduce the noise of both boats and drones. There could be many applications for this, such as cargo ships, electric flying taxies, and even computer fans [**https://www.youtube.com/watch?v=Df32lrVy5os**](https://www.youtube.com/watch?v=Df32lrVy5os)**Testing MIT's Toroidal Drone Propeller Design & Sound**[**https://www.youtube.com/watch?v=z\_d9Nt\_8FWg**](https://www.youtube.com/watch?v=z_d9Nt_8FWg)**DIY MIT Toroidal Propellers for Cinewhoop FPV Drones**[**https://www.youtube.com/watch?v=hby6U47oV\_k&t=0s**](https://www.youtube.com/watch?v=hby6U47oV_k&t=0s)**MORE Toroidal Propeller Designs and Improvements for Drones**[**https://www.youtube.com/watch?v=hyT3NR-jjV8**](https://www.youtube.com/watch?v=hyT3NR-jjV8)**MIT Toroidal Propeller Testing - Performance, Efficiency, and Response - PETG + PLA****Sharrow and MIT have both been working on toroidal propellers which have shown incredible results.**[**https://newatlas.com/aircraft/toroidal-quiet-propellers/**](https://newatlas.com/aircraft/toroidal-quiet-propellers/)**Toroidal propellers: A noise-killing game changer in air and water Toroidal propeller vs 3D printed EDF TOROIDAL PROPELLER on a DRONE | DIY 3D printed 3D Printed Drone Toroidal Propellers vs Regular Propellers Toroidal vs Regular 3D Printed Propeller Hover Comparison Toroidal Propeller for 3D Printing (Tutorial) V3 Tri-Loop or Tri-Blade Toroidal Propellers for FPV Drone 3D Printed Toroidal Propeller on a Drone** --- ![](1.jpg) ![](6.jpg) ![](7.jpg) ![](8.jpg) ![](9.jpg) ---