But thanks to a doctoral thesis he found, it’s also possible to control a traditional single-rotor helicopter by substituting flexible rotor hinges and precise motor speed control for the ...

[Tom] likes to build little helicopters ... design. He considered counter-rotating props, but there were a host of problems involved. He finally settled on a single prob with a tail rotor that ...

The Raider X is a next-generation helicopter under development by Sikorsky ... with Western helicopter makers. This design eliminates the need for a tail rotor, which in turn reduces the total ...