I appreciate the patience and help that several of you have put out in my cries for FNG help.
I can't find any good info on why I was told that a IC engine quad rotor with collective pitch rotors would not be able to respond quickly enough to keep it stable. If I configure the APMs ESC wires to control the digital servos for the swashplates instead of DCBMs and have separate throttle control for IC engine RPM, would the change in pitch be so slow that the bird would be hard to stabilize? I don't want to do any crazy 3D or monkey flip flying, just stable.
I realize that the ESC DCBM combo is way fast, but I can't see the blade pitch changes being that far behind.
How long does it take the airflow/thrust to change with the blade pitch changes vs DCBM speed changes?
Thanks for input and any links to data or personal experiences.