odel aircraft half rolls into inverted attitude and makes a straight inverted flight of 100 meters in length, and then half rolls out of inverted attitude and resumes normal straight flight. A low powered aircraft would be expected to execute a shallow dive at full throttle in order to pick up speed before commencing the maneuver.


  1. Half rolls not performed on same track as inverted flight.
  2. Model aircraft does not fly a straight course.
  3. Model aircraft gains or loses height.
  4. Model aircraft does not remain inverted for the prescribed duration.
  5. Maneuver not centered on judges’ position.
  6. Maneuver not flown parallel with judges’ line.
  7. Too far away / too close / too high / too low.