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" ...

Authorities are still searching for the rotors of a tourist helicopter that plunged into the Hudson River, killing all six people aboard, officials said Friday. National Transportation Safety Board ...

Add Yahoo as a preferred source to see more of our stories on Google. It's too early to say what happened to the sightseeing helicopter that crashed into the Hudson River in New York City, killing all ...

Add Yahoo as a preferred source to see more of our stories on Google. Officials have identified all six people aboard the sightseeing helicopter that crashed into the Hudson River near New Jersey as ...

Aviation experts have suggested the rotor of a sightseeing helicopter suffered "catastrophic failure" before it plunged into the Hudson River Thursday, killing a tech company CEO, his wife and three ...

It's too early to say what happened to the sightseeing helicopter that crashed into the Hudson River in New York City, killing all six people on board, but aviation experts said a failure may have ...

Officials have identified all six people aboard the sightseeing helicopter that crashed into the Hudson River near New Jersey as investigators scour the murky water for additional parts of the chopper ...