OTHER: Helicopter - Inside - Interleaving ABC - Pros & Cons vs. Coaxial ABC

• The disk areas and their relationship to each other give the Interleaving configuration a much superior lift/power ratio over that of the coaxial.
• The Interleaving configuration has a much larger disk area and lower disk loading for the same diameter rotors. Or conversely, smaller rotors for the same disk loading.
• The overall width of the Interleaving disks will be greater than the disks of the coaxial, however the overall length of the Intermeshing will be less than the coaxial. This is because the Intermeshing disks are smaller, plus the vertical stabilizer can be partially located between these disks.
• There will be a significantly smaller aerodynamic interaction between the two rotors on the Interleaving configuration. On the ABC coaxial, the downwash from the advancing slow-turning large-chord blades of the upper rotor will create a vibration on the retreating slow-turning large-chord blades of the lower rotor. In other words, the Interleaving rotors operate in much 'cleaner' air.
• The Interleaving is truly symmetrical and it therefore realizes the associated advantages; such as reduced cross-couplings.

• The interleaving configuration creates a lower induced velocity for rotors that are identical to the coaxial rotors. This means a smaller engine and power train, or alternatively, the rotors can be small than those on the coaxial with the resulting reduction in profile drag.

• The Interleaving configuration can incorporate a canard; should it prove advantageous. OTHER: Helicopter - Inside - Interleaving - w/ Canard Wing
• If a mechanical means of Independent Root and Tip flight-control is desired, it may be impossible for the Coaxial to locate all four flight-control assemblies in the same general local.

• Lower overall width, over the rotors.
• Other advantages.

• "At the same disk loading (interpreted as loading per disk of one rotor) relative induced drag of the ABC/synchropter [Intermeshing] configuration should be somewhat lower than that of the co-axial. However, at high cruise speeds, beginning at 200 knots, those gains will be small."
• Note that these remarks relate to the Intermeshing, not the Interleaving. However, relative induced drag of the Interleaving configurations should be better than the Intermeshing and the Coaxial at high cruse speeds.

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