Inverted Heli thrust correct? - Is the inverted Heli vertical thrust correct?!?

[Anu]

This one is simple to replicate; FMS 2.0 Beta7.

Load one of the 'stock' helis;

Lift the heli off the ground, enough so to invert the heli.

At this point, the heli's vertical thrust behaves exactly the same as before the heli was inverted -- save for the actual stick direction. The pitch/roll, etc functions work fine; just the actual collective/throttle.

ie. if the heli was set so a neutral stick gave neutral, perfect hovering flight, the same stick setting will be perfectly neutral when the heli is inverted. (Rather than accelerating towards the ground. The throttle and collective are unchanged, the rotor is still pushing air towards the skids-- which is fine if the helicopter is upright; the main rotor's thrust is counter-acting the force due to gravity. But if the heli is inverted, both the heli's main rotor thrust AND gravity are working together to crash the heli... But FMS still contends the heli is hovering normally, rather than crashing.