X3 Gyroplane Uses 15 Blades to Race at 253MPH
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. https://gizmodo.com/sikorsky-x2-helicopter-tested-even-cooler-than-expecte-5044737 Invented by Juan de la Cierva in 1923, the autogyro was the precursor of the modern helicopter.…