Bell revealed this week that, in addition to its well publicized eVTOL programs, it has been developing an electrically distributed anti-torque (EDAT) system to replace the tail rotor on conventional helicopters. EDAT has been in flight testing since May 2019 on a Bell 429 helicopter. The system comprises four small fans within a tail rotor shroud, with each fan powered by a separate electric motor. Electricity is supplied through generators driven by the turbine engines. Like other examples of distributed electric propulsion for VTOL flight, the arrangement promises advantages in noise, safety, and operating costs, Bell’s Eric Sinusas told eVTOL.com sister publication Vertical Magazine. “We’re still going to be optimizing it and refining it, but the product feedback in its current configuration has been very positive,” he said. Read more about the system here.