Something to remember in a conventional single rotor helicopter is that the aircraft is supported from the motor hub, with the CG significantly below. There is an appreciable pendulum effect as one slows into a hover, which one must compensate for. Think of a yo yo or plumbob on a string, note how it will pitch up (swing fwd) as you bring it into a "hover". This is where the active compensation of an inherently unstable system comes in.
Accurate controls are necessary with zero null zone. From flying FSX choppers I taught myself enough that transferred to real choppers for both my instructors to say I was the best student they ever had. Because of the lack of seat of the pants feel, FS may be harder!
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