Undefined Technologies Silent Ventus Drone Ion Propulsion
Undefined Technologies’ ion-propulsion Silent Ventus drone may not be as agile as this one used for a Red Bull stunt, but it did manage to keep noise levels below 75 dB during its recent 4.5-minute test flight. The startup is aiming to achieve flights of at least 15-minutes of duration with noise levels below 70 dB by the end of 2023, thus eliminating noise restrictions for the last-mile cargo delivery sector.



What makes this low noise level possible is its “Ion Booster,” which produces an ion cloud to yield higher levels of thrust, or up to 150% compared to current ion thruster technologies. This boost generated by the innovative technology results in a technical and commercial opportunity for ion thrusters to become a viable option for electric propulsion. A production-ready serial drone is expected to be unveiled in 2024.

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We’ve been on this upward trajectory for nearly a whole year, working hard on overcoming many technical challenges related to craft’s cooling systems, battery lifetime, avionics, and noise-abatement technologies. This milestone secures our vision of making ion propulsion technology viable for use in atmospheric conditions. I’m incredibly proud of our highly dedicated team who has been relentless in bringing our breakthrough over to the next development phase,” said Tomas Pribanic, Founder and CEO of Undefined Technologies.

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