The model aircraft commences the maneuver in level flight by reducing power on base leg, and then turns onto a higher than normal final approach that is parallel with the judges’ line. As model aircraft enters the turn it starts a Side-slip by the application of opposite rudder to the direction of turn, achieving a yaw of at least 20º off track. A marked loss of height must be apparent while maintaining final approach speed. The aim of the Side-slip, if continued, would be to effect a landing in front of the judges.

Before reaching judges’ position however, the Side-slip is corrected, normal flight is resumed and the model aircraft carries out an overshoot from below 5 meters before climbing away. Purpose of this maneuver is to demonstrate a marked loss of height on final approach without an excessive build up of speed or the use of flap. This maneuver may be nominated by all types of model aircraft.


  1. Model aircraft does not smoothly enter Sideslip upon turning final approach.
  2. Model aircraft is not yawed at least 20º off track during Sideslip.
  3. Rate of Sideslip and descent are not constant.
  4. There is insufficient height loss.
  5. Excessive speed is built up during descent.
  6. Approach track not maintained or not flown parallel with judges’ line.
  7. The Sideslip is not corrected before passing the judges.
  8. Overshoot is not below 5 meters.
  9. Not a smooth transition during return to normal flight and climb out.
  10. Too far away / too close / too high / too low.