OTHER: Helicopter - Inside - Pros & Cons Interleaving vs. Intermeshing

• It will have the lowest disk loading of all configurations, with the exception of the Side-by-side. This is a significant advantage when considering Heavy Lift Rotorcraft.
• The Mil Mi-12 Homer holds the record for the world's largest helicopter. It is basically Side-by-side, however it's rotors interleaf by 10 feet.

• Approximately 12% smaller rotors and blades for the same disk loading.
• There is little or no rotor-to-rotor downwash.
• The airflow to the upper quadrant of the pusher propeller is subjected to less blockage and less turbulence from the fuselage and mast(s).
• There is little aerodynamic interaction between the rotors and the propeller.
• The Interleaving's axe of rotor rotation can be vertical. This eliminates the Torque-Pitch coupling that is experienced by the Intermeshing configuration.
• It is said that the Intermeshing (2-blade) produces vibration. Assuming that the source of this vibration is rotor-to-rotor, the Interleaving never has a blade overlaping the blade of the other rotor.

• Less parasitic drag from the structure that supports the rotors
• Lower empty weight. This may not be so since the rotors on the Interleaving can be smaller for a matching disk loading.
• Faster responses to cyclic inputs, since the moment arms are shorter. This may only be true for lateral cyclic [roll].
• Smaller footprint on the ground.

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