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Of course, there are lots of helicopter toys out there, but the RCX4 wowed with its dexterity. The tagline of vendor Digittronics is \"easy to fly,\" and the demo showed off the RCX4's ease of handling features, including gyroscopic control of balance, and some kind of automatic climb rate control. The operator could abandon the controls for several seconds, and the RCX4 would stay serenely in the the air, drifting slightly but stable and level.
