Related time notes
- KA-27 Helix; Rugged, Reliable, Pin Up Model for Contra Rotating Rotors!36:33Maintainability sustains civil exports until the European market contractsNotable Point
- KA-27 Helix; Rugged, Reliable, Pin Up Model for Contra Rotating Rotors!41:04Kamov's coaxial layout continues in later Russian rotorcraftNotable Point