World's largest under 25kg quadcopter drone takes flight

The UK Civil Aviation Authority allows UAVs with a takeoff weight under 25 kg (55 lb) to fly without special dispensations, so the Manchester team came up with a design that weighed 24.5 kg (54 lb) to sneak under the limit. 

https://m.youtube.com/watch?v=S_Qy8MyZZk0&embeds_referring_euri=https%3A%2F%2Fnewatlas.com%2F&source_ve_path=Mjg2NjY&feature=emb_logo

https://www.manchester.ac.uk/discover/news/manchester-researchers-design-and-fly-worlds-largest-quadcopter-drone/