Are there helicopters that can fly 1G inverted?

I have seen helicopters perform rolls, loops, hammerhead, and the like, but can any helicopter sustain inverted flight even momentarily?

Are there helicopters that can fly 1G inverted?
IN ANSWER TO YOUR QUESTION; YES, RIGHT NOW THE U.S. AIR-FORCE AND THE BRITISH AIR-FORCE ARE TEST-FLYING AN UP-GRADED HELICOPTER, WHICH IS IN THE FAMILY OF THE "APACHEE AND A VERSION OF THE LYNX HELICOPTER'S", WHICH CAN NOT ONLY DO A FULL LOOP, BUT CAN ACTUALLY STAY INVERTED MOMENTARILY, BUT YOU KNOW YOURSELF THAT HELICOPTER'S WHICH REMAIN INVERTED TOO LONG, WILL CERTAINLY FALL OUT OF THE SKY LIKE A ROCK.
Reply:No. Think about it. The chopper is kept airborn by the rotating blades creating higher pressure below them than above them. Upside down, assuming you could get it to turn upside down, the chopper is being forced to rapidly accelerate towards the ground so you end up in a powered free-fall. Not pleasant.
Reply:No.
Reply:If the main rotor blades were reversible like airplane props, it might be possible. They are not reversible.
Reply:It makes no sense really. The blades are to heavy. G force has only a limited effect on gravity. Eventually gravity takes over and weight is relevant.



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