Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Watch a helicopter fly, and the big spinning top rotor hogs the ...

The Rotodyne might have looked like part helicopter, part plane, but it was actually neither. Where a helicopter uses engine power to spin a rotor blade to force air down and create lift, on a ...

Ordinarily on a helicopter, the main (top) rotor is mechanically linked to the tail rotor, so the spinning of the former causes the latter to do likewise. An experimental new system replaces the tail ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. As Uber sees it, someday we might cruise around cities in small ...