| skos:altLabel | - Coaxial
- co-axial
- co-axial rotor
- co-axial rotors
- coaxial
- coaxial counter-rotating main rotors
- coaxial design
- coaxial double rotor
- coaxial helicopter
- coaxial helicopters
- coaxial main rotor
- coaxial main rotors
- coaxial proprotor
- coaxial rotor
- coaxial rotor helicopter
- coaxial rotor system
- coaxial rotorcraft
- coaxial rotors
- coaxial, contra-rotating
- coaxial, counter-rotating
- coaxial-rotor
- contra-rotating coaxial rotors
- contra-rotating, coaxial rotors
- dual counter-rotating rotors
- rotors
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