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. ow.ly/yWA150MkbPw
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MIT Lincoln Laboratory, founded in 1951, applies advanced technology to problems of national security. Research and development activities focus on long-term technology development as well as rapid system prototyping and demonstration. The Laboratory works with industry to transition new concepts and technology for system development and deployment.
Video: Riley Brunner/MIT Lincoln Laboratory