Thoms and Crab,
You guys have been around a bit.
care to explain just how after a rotor disc has fully developed its own bubble of vortices separate from the surrounding air mass, (VRS) which of course allows the disc complete with helicopter to fall at a diabolic rate, and then retain that bubble in the face of the equal and opposite diabolic rush of relative airflow?
and still be doing it many thousands of feet later? what were those idiots doing to fly into the gound (as you say) doing VRS exercises. see next para.
Care to also explain how an out of control helicopter can be flown out of VRS (as they say) by applying a cyclic control input?
Helicopters in VRS and near vertical descent trying to find VRS are still operating at 1G, unless i've missed something?