Those little micros you've been asking about aren't going to fly on a typical day in your backyard in the hands of a novice pilot. The champ might handle a few mph in a wide open space, but every item in the wind's path creates turbulence. That means that it will fly in swirling, inconsistent wind that, at best, will keep the pilot busy maintaining heading (assuming the pilot is already skilled enough to do that when he's not fighting wind) and at worst will exceed the flight capabilities of the plane.