Mart,
Criticism and concerns are genuinely wanted. It's a lot better to discover the problems on the drafting table then later, on the assembly table.
All helicopters have pros and cons. There are numerous
concerns about the intermeshing configuration . IMO, the primary one is rotor-to-rotor vibration and next one is yaw control.
The means of reducing rotor-induced vibration was covered in a previous post in this thread.
Here is some additional information on this subject
Yaw control should only be a concern when considering autorotation. This concern is applicable to the intermeshing and the coaxial configurations. Here are a couple of pages on yaw control, as it related to the SynchroLite;
DESIGN: SynchroLite ~ Control - Flight - Directional &
DESIGN: SynchroLite ~ Rotor - Disk - Opposed (Differential) Lateral Cyclic
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When considering the pros and cons of different rotor configurations, you might look into the
interleaving. If there is any desire for a discussion about the interleaving configuration, it should probably be done on its own thread.
Dave