Paul wrote:

What is wrong with this picture?

Paul Lamar

I do not know if this is what you meant - but it appears that rotors 1-3 and
then
2-4 have simultaneous firing, this would essentially remove the need for
counterbalance, but at the expense of torque ovrlap - Vance

That may be but the problem is more serious than that.

Paul Lamar
 
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