Then maybe try :
FVector NewDuckLocation = GetActorLocation() + (FRotator(0, TurningValue.Yaw, 0).RotateVector(Velocity) * DeltaTime);
Then maybe try :
FVector NewDuckLocation = GetActorLocation() + (FRotator(0, TurningValue.Yaw, 0).RotateVector(Velocity) * DeltaTime);