Light rotorcraft maker Robinson Helicopter and biotechnology firm United Therapeutics recently ground tested an R44 modified with hydrogen fuel cells, and the companies say test flights are imminent.

Combined with magniX’s Samson batteries, HeliStorm engines enable the company to offer a complete electric solution for rotorcraft. The first engine in the range provides peak power of 330kW at a ...

A helicopter crashed into a radio tower Sunday night in east Houston, killing several people — including a child — as it caught fire and plunged to the ground, authorities said. Four people were ...