OTHER: Helicopter - Inside - Pros & Cons Interleaving vs. Intermeshing
Advantages of Interleaving:
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.
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.
- 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
Advantages of Intermeshing:
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.
To be located in appropriate configuration and elaborated on.
Moment Arms, Structural Strength and Increased weight and Drag:
Drag: Parasitic, Profile, and Induced:
Blade Ground Clearance:
OTHER: Aerodynamic - Rotor Disk - Dual Configuration - Intermeshing ~ Advantages Does this belong in the top section???
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Last Revised: February 15, 2012