Sikorsky MARINER/"Cypher II" helicopter - development history, photos, technical data
Sikorsky Cypher – Igor I Sikorsky Historical Archives
Cypher Drone - YouTube
File:Sikorsky Cypher 2.png - Wikimedia Commons
Sikorsky Cyphe circa 2002: Sikorsky Aircraft Corporation in Connecticut developed the doughnut-shaped, rotor-powered S… | Prop design, Concept design, Sci fi design