edge 720!?!?!
I am confident that the Shark would have hovered. It was going to be much lighter than anything else out there with an AEIO 540.
My understanding is that the Static thrust of an AEIO 540 puts out almost exactly the same power as the weight of the Edge 540 but the prop wash creates about 150 lbs of drag on the airframe causing slightly less than 1 to 1 thrust.
Dan