Noise is a critical concern for Uber as it develops its Elevate vision of operating networks of hundreds, even thousands of eVTOL air taxis over congested cities. In a bid to minimize noise, the ride-hailing giant has signed a cooperative research and development agreement with the U.S. Army Research Laboratory (ARL) to develop stacked corotating rotors. Uber’s noise goal is to achieve aircraft acoustic signatures that map into background city noise levels.“Simplified comparative ...
