MIT recently announced its research on toroidal propellers to create quieter drones. That got [Major Hardware] thinking about noisy PC fans. The obvious solution was to adapt the toroidal shape ...

The propeller manufacturer stated the polymer propeller used on the drone “should not be used” in a coaxial configuration, ...

A team at MIT’s Lincoln Lab has developed a new propeller shape that significantly reduces the noise associated with drones. [PDF via NewAtlas] Inspired by some of the experiments with “ring ...

Israeli cleantech partners Bladeranger and Propeller Drones have secured a significant service agreement to use their advanced drone technology to clean the solar energy fields of Electra — a huge ...

The new light-attack helicopter uses a strange "coaxial design." What that means is, the top of the chopper has two counter-rotating blades while a push propeller is hanging out at the back of the ...