Translations:KAVAN Dingo A3 glider kit 796mm - Instruction manual/34/en

From KAVAN RC Wiki

If everything is OK (correct wing and tailplane alignment, correct CG position) DINGO 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. On the other hand, if your model pitches the nose up and stalls, sand the rear horizontal tailplane seat 39 step by step, until the model glides in a nice flat and straight path.