Translations:KAVAN TARA A1 (F1H) - Instruction manual/43/en

From KAVAN RC Wiki

Final assembly, Centre of Gravity (CG)

Secure the side towhook 39 to the left side of the fuselage using two screws 38 – refer to the building plan. The towhook is adjustable. You can move it forward on a windy day or backward on a calm day in order to achieve nice and steady climbing during the hi-start.