Looks like the autogyros, a.k.a., gyrocopters, are definitely back in fashion. Following the Sikorsky X2 demonstrator, here is the latest one, the Eurocopter X3. It uses twin five-blade turboprops in addition to its main five blade rotor. More »

Read more: http://feeds.gawker.com/~r/gizmodo/full/~3/1z3KY91A9r8/x3-gyroplane-uses-15-blades-to-get-253mph