Translations:KAVAN Orion A3 glider kit 930mm - Instruction manual/36/en

From KAVAN RC Wiki

If everything is OK (correct wing and tailplane alignment, correct CG position) ORION will fly with the wings level in a nice glide with her nose pointing slightly down. If the model glides straight down to the earth a few paces in front of you, check the CG position again. If OK, add a thin piece of balsa or plywood under the trailing edge of the horizontal tailplane until the model glides in a nice flat and straight path.