While the fastest, most agile aircraft in the world undoubtedly still fill military hangars, the fastest civilian helicopters ...

Unither and Robinson Helicopter are collaborating on the hydrogen-powered helicopter program, called Project Proticity.

The first flight of a hydrogen-powered helicopter has been accomplished in Canada by Unither Bioelectronics. A subsidiary of ...

The National Transportation Safety Board says a fuel leak in the outer left wing tank, near the engine, was subsequently discovered and a repair attempted. But this repair “did not fix the leak ...

Roughly 10 gallons of avgas spilled out of the 26-gallon fuel tank aboard the helicopter, and the fire department’s hazmat unit was sent to mop it up, according to reports from the scene.