Translations:KAVAN DARA A1 (F1H) 1200mm - Instruction manual/44/en

From KAVAN RC Wiki

Once satisfied, bend the rudder 41 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 DARA right - resulting in straight flight.