The world’s largest quadcopter drone has been designed and successfully flown by engineers from The University of Manchester.
I don't think that that's it. But I guess without the original link from the OP, we'll never know.World’s largest quadcopter drone made from foamboard takes flight
The Giant Foamboard Quadcopter (GFQ) is unlike any other drone worldwide thanks to its innovative design. It is made from foamboard, a cardboard type with a foam core and a paper skin.interestingengineering.com
I Google it and found this...
