Translations:KAVAN Orion A3 glider kit 930mm - Instruction manual/37/en
Once satisfied, bend the rudder 46 slightly (about 2 mm) to the left (looking from the tail to the nose). Now the model should glide in large left (counter clockwise) turns; whilst under tow, the off-centre tow hook would force your ORION right - resulting in straight flight. Elementary!