A tourist helicopter crashed into the Hudson River in New York City on Thursday, killing six people. A former military helicopter pilot told BI the helicopter's rotary system appears to have ...

A New Hampshire company is working to develop a fleet of autonomous helicopters that it hopes can be used to put out fires, spray crops and handle other dangerous jobs.

The mast nut is an essential element to any helicopter, keeping the entire blade assembly in place and attached correctly to the rest of the helicopter.

A New Hampshire company is working to develop a fleet of autonomous helicopters that it hopes can be used to put out fires, spray crops and handle other dangerous jobs.

A Rotor Technologies unmanned semi-autonomous helicopter flew away from a van containing a ground control pilot/operator during a test flight over Intervale Airport in Henniker, N.H. Charles Krupa ...

"If you lose your main rotor, meaning it's detached, you have no lift, you're done," Alexander said. "There's nothing you can do at that point; you're just a falling object." He said a helicopter ...