ABC question
My understanding of ABC is that the retreating blade is at a very low or zero angle of attack regardless of the angle of attack of the advancing blade. I guess the reason is to eliminate retreating blade stall. If this is correct then how can ABC work with any design other than a coaxial? With a coaxial as the blade is advancing on the left side, the other rotor has a blade advancing exactly opposite on the right side. This seems logical so the lift stays on balance left to right. If you do this with a two bladed syncropter such as the K-max you would have a blade on one side advancing while the other rotor has its blades aligned longitudinally with the fuselage. If the lift alternates left to right with each passing blade that would cause a huge vibration. My question is am I understanding this correctly, that a sychropter can not be an ABC design? I would appreciate it if someone corrects me and can lead me to a detailed explanation of the ABC designs.
Thanks,
Rene