In the advanced flight mode, while flying the hummingbird, increasing collective causes an unrealistically severe change in rotor RPM, preventing lift. This is entirely realistic if there's a manual throttle, but I can't seem to find the controls for managing a manual throttle.
Also, simply adjusting the cyclic in any direction causes the rotor RPM to drop severely, which as far as my experience in flying goes, is entirely unrealistic.
Settings to flight mode to advanced. Turn on all advanced setting functions. Set collective increase to "W"& "joystick slide+". Jump into hummingbird. start engine. press W. put joystick slide to full. hear and watch rotor rpm drop
I think, I know, what your problem is.
As far as I understood, you always flight with maximum raised collectives and have problems with simple changing directions?
Do NOT raise the collective to maximum. Stay on or under the last collective line (75 %).
Use maximum collective only in emergency situations (f.e. gaining height very fast).
You will overtorque the rotor if you always use maximum collective. Overtorquing the rotor causes damages on your engine and lost of RPM. Loosing RPM causes fatal or no proper maneuvers.
I tested it out today. while looking at the rotor RPM, there's a direct correlation between reduction in rotor RPM and the degree of collective being raised. At collective lowered to flat pitch, the rotor RPM is within normal limits, but of course there is no lift. at middle ranged collective, the RPM drops to the lower limit, but doesn't produce enough lift to hover. full collective creates enough lift lift off, but the rotors immediately drop to well below limits, causing the aircraft to drop. It's not even like there's no governor, it's actually more like the engine is at idle.
Also, there still isn't any explanation for the drop in rotor RPM as a result of forward cyclic. As far as my knowledge of helicopters and aerodynamics goes, this will never happen in real life. I'm aware of transient torque, but that only increases torque during left banks, which could result in a drop in rotor RPM.