The latest step in fuel cell flight has taken to the skies with the world’s first hydrogen helicopter flew for more than 20 minutes. The technology demonstrator developed by United Technologies Corp. features a proton exchange membrane fuel cell.
There’s one small catch — the helicopter has a rotor diameter of two meters. The remote control copter was designed to run on batteries. UTC modified it to use a fuel cell, and the flight was made entirely with hydrogen. Despite the diminutive size of the helo, Dr. David Parekh of UTC called it a significant step forward because of the unique challenges of helicopter flight.
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