Hydrogen Cells Best Batteries in Hour-Long Drone Test Flight

An under-development drone powered by a hydrogen fuel cell beat its hour-long flying time target in recent testing, staying aloft for over 70 minutes with a 5 kg payload. Dubbed Project Rachel, the British drone is a collaboration between engineering firm Productiv, UAS videography company BATCAM and fuel cell provider Intelligent Energy, with support from Innovate U.K., a group set up with British government money to stimulate growth by providing grants to business ventures with new ideas.
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