Category
page 1Compound helicopters
Lockheed AH-56 Cheyenne
1967 attack helicopter series by Lockheed
Sikorsky S-97 Raider
proposed high-speed scout and attack compound helicopter
Eurocopter X³
experimental high-speed compound helicopter
Sikorsky X2
experimental high-speed compound helicopter with coaxial rotors
SB-1 Defiant
experimental gyrodyne by Sikorsky and Boeing
Sikorsky S-72
US experimental hybrid helicopter/fixed-wing aircraft
X-49
experimental aircraft by Piasecki Aircraft
Bell 533
research helicopter built by Bell Helicopter
Kamov Ka-92
type of aircraft
Lockheed XH-51
1962 experimental helicopter series by Lockheed
Piasecki 16H Pathfinder
American experimental compound helicopter
Kamov V-100
type of aircraft
Sikorsky Raider X
American high-speed scout and attack compound helicopter