NASA prepares test flight of unmanned solar plane
NASA is planning a series of test flights of an unmanned flying wing that's designed to run on solar power and cruise for days at 100,000 feet, more than three times higher than commercial jets. The
NASA is planning a series of test flights of an unmanned flying wing that's designed to run on solar power and cruise for days at 100,000 feet, more than three times higher than commercial jets. The