***The Aileron Roll:
To begin an aileron roll, you would bring the control stick back slightly to raise the nose a few degrees above the horizon. Depending on the aircraft anywhere from five to 10 degrees. Then neutralize the controls, stick back to the center." That part is key; if the stick is held back throughout, the roll wobbles from its small circle.
After the stick is neutral, Rapidly apply full stick in the direction you want to roll, There's no real preference to roll right or left. Most American and European- built aircraft would favor to the left because of the turning tendency, the torque, from the propeller turning right.
Some pilots applies a slight rudder pressure to support the direction of roll he has in mind. "But for rapid rolls, the airplane turns so fast on its axis that not much is needed. You use the horizon for your guide to see that you've made one rotation.
After the rotation, the nose has likely dropped below the horizon. Once the ground comes back to level in your flight picture, you rapidly neutralize the controls to stop the rolls, meaning, return the stick to center. Maybe even push a bit to the opposite direction.
A lot of aerobatic aircraft weigh close to one ton, and it generates a tremendous inertia during the roll, so if you don't add a bit of opposite stick it has a tendency to roll past.
There's an art to it, a lot of it is by feel. The aircraft handles differently on a hot versus a cool day. Once you've got the touch, you can adjust to each roll.
*** Aerobatics are governed by special aspect of FAR 91.303, which requires aerobatics to be performed in a specified box of air space, and requires that the aircraft be certified for acrobatic flight and a utility rating and that the pilot(s) wear parachutes.
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Aerobatic Schools and getting started.
