Category
page 1Slowed rotor
Eurocopter X³
experimental high-speed compound helicopter
Sikorsky X2
experimental high-speed compound helicopter with coaxial rotors
Fairey Rotodyne
1950s British compound gyroplane
McDonnell XV-1
1954 experimental compound gyroplane model by McDonnell Aircraft
A160 Hummingbird
unmanned aerial vehicle by Boeing
Pitcairn PCA-2
autogyro developed in the United States in the early 1930
Carter PAV
Two-bladed compound autogyro