Norwegian Griff Aviation company has created a heavy-cargo drones that can lift up to 225 kilogram (496lbs), in addition to its own 75 kilogram (165lbs) weight, depending on payload, and pilots through the air for 30 to 45 minutes on a single charge. The Griff drone will be available in three models the 125, 300… Continue reading GRIFF 300: Heavy Lifting Drone