Mast bumping is a critical aerodynamic hazard associated with two-bladed, semi-rigid main rotors (prominently in Robinson and certain Bell helicopters), occurring when the main rotor is "unloaded" ...

Forensic engineers examined the main rotor driveshaft that had sheared just below the teeter stops. Teeter stops are fitted to the main rotor driveshaft to prevent the main rotor spindles from ...

A Los Angeles law firm has filed a lawsuit against Torrance-based Robinson Helicopter Co., alleging that two veteran Arizona pilots died in a June 2016 crash caused by defective rotor blades hitting ...

A New Zealand government agency that suspended the use of Torrance-made Robinson helicopters in November 2016 in the wake of a crash that killed two of its employees has now made the move permanent, ...