14 June 2017
Aviation Week reports that NASA’s Sean Clarke spoke at the AIAA AVIATION Forum in Denver last week on the agency’s X-47 electric aircraft, and the challenge batteries have posed to its development. The aircraft’s current battery packs “provide 47 kWh of energy and weigh close to 900 lb., an increase of more than 10% over the original goal.” Clarke said that the packs “have used up our mass margin.” (Image Credit: NASA)
More Info (Aviation Week)