Translations:KAVAN Dingo A3 glider kit 796mm - Instruction manual/35/en
Once satisfied, bend the rudder 30 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 towhook would force your DINGO right - resulting in straight flight. Elementary!