“Tail rotor separated,” they wrote ... for example), the helicopter can start to spin uncontrollably around its vertical axis ...

The H140 has a five-blade main rotor and a sleek, swept vertical and T-tail horizontal stabilizer for improved aerodynamics. Credit: Airbus Helicopters Airbus Helicopters has adopted a low-risk ...

Sikorsky piloted its rotor blown wing UAS in both helicopter and airplane configurations, confirming the successful ...