There are some situations where a helicopter, especially one with
wheels, will choose to get a "running start" before lifting off into
the vertical.In some cases of high altitude / density altitude and
a large payload, a running start allows the chopper to get into the
air with more payload and less strain on the systems. Also in dusty enviroments, a rolling takeoff helps keep the pilots vison
ahead clear as the dust is left behind.
In regards to the G-forces, most helicopters rarely pull any G's at
all due to the fact that they are relatively slow (most under 200
mph) and in most cases do not require abrupt manuevers at high
speeds. The Hind, is however one of the attack helicopters that
does operate more like a fixed wing airplane (high speed, wider
turns) and is also one of the most heavily armored helicopters
flying in the world today.
I remember reading a quote from the afganistan war in the the
rebels said, "We are not afraid of the Russians, but we are afraid
of their Helicopters".........
