The Robinson Helicopter Company R44 Raven II helicopter, the type involved in a fatal crash in Houston Sunday is a popular aircraft for private pilots and law enforcement. A helicopter had crashed ...

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.

ROBINSON HELICOPTER CO., WHOSE R22 AND R44 HELICOPTERS are powered by piston engines, continues to gain market share against turbine-powered helos. In the first six months of the year, Robinson sold ...