A team of researchers has created the simplest drone in the world. The'monospinner' was demonstrated at the ETH Zurich Flying Machine Arena and has just one moving part – a rotating propeller that allows it to spin through the air. Its movements may look erratic, but the drone is controllable, using feedback to keep the vehicle near its equilibrium. A team of researchers has created the simplest drone in the world. The'monospinner' was demonstrated at the ETH Zurich Flying Machine Arena and has just one moving part – a rotating propeller that allows it to spin through the air The monospinner works by maintaining an'unconventional equilibrium.'