• Hover: None of the downwash from the PropRotors is onto the wings.
• Autorotation: The wings are not detracting from the efficiency of the PropRotors. Perhaps they are slightly due to forward velocity..
• Cruise: The coaxial effect of a high induced velocity from a smaller streamtube then that of a conventional rotor. See graph on DESIGN: UniCopter - Pusher Propeller

• 1x2: The tilt mechanism of the front PropRotor is more complex then that of the Tilt-rotor.
• 2x4: The tilt mechanisms of all four PropRotor are more complex then those of the Quad Tilt-rotor.

See: PropRotor Pros & Cons VS. Coaxial ABC Helicopter and TiltRotor

Also: OTHER: Helicopter - Inside - Interleaving - Pros & Cons vs. Tilt-rotor

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