The design is a result of an eight-year study of the Samara, or winged seed, which twirls down from Maple, Ash, and other trees annually.
The winged seed has had thousands of years to evolve, and, after birds and flying insects, is probably the most studied part of nature with regard to aeronautics.
Nature has a lot to teach us about innovating our present-day technology, and the Bennett Botanical Propeller Technology is a shining example of that progress.