A few years ago the Australians (IIRC) came up with a simple carton with top flaps which opened out as rotors, allowing it to autorotate slowly to the ground. A couple of cords, which crossed under the bottom of the box, went to the tips of the 'rotors' to take the flight loads.
This is a similar concept, but of much more complicated construction:
CopterBox Expendable Airdrop Delivery System for Ammo, Food, Meds, and More | DefenseReview.com (DR): An online tactical technology and military defense technology magazine with particular focus on the latest and greatest tactical firearms news (tact
