X3 Gyroplane Uses 15 Blades to Race at 253MPH [Video]
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 »
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