Question: The Kamov V-80 eventually evolved into that single seat Russian attack helicopter?
Sentence (from "Lockheed AH-56 Cheyenne"): Lockheed designed the Cheyenne using a four-blade rigid-rotor system and configured the aircraft as a compound helicopter with low-mounted wings and a tail-mounted thrusting propeller driven by a General Electric T64 turboshaft engine.
Relevant evidence: No