We would like to know what is the maximum vertical height and the maximum horizontal distance the Parrot can be operated outdoors. Basically the horizontal and vertical range to operate the Parrot.
Actually it is important not to lose Wi-Fi link with the AR.Drone so the maximum distance is the Wi-Fi range. It can go up to 50m but this can depend on the environment. It could be less if the Wi-Fi is congestioned.
This could probably be augmented through the use of a wifi repeater, especially if you use a specialized antenna with said repeater.
What would be /really/ crazy, is setting up an auto-tracking cantenna which follows the position of the drone, ensuring maximum signal strength during extended-range flights.