If the center of gravity were here then it would pitch upward
If the vertical stabilizer is this size then it will not catch air and will yaw/roll (turn right/left)
If the center of gravity were here then it would not pitch up/down, but fly straight
Horizontal stabilizer
If the center of gravity were here then it would pitch downward
If the horizontal stabilizer is this size then it will pitch upward because it is too heavy
If the vertical stabilizer is this size then it will pitch upward because it is too heavy
Recommended size of horizontal stabilizer for a stable flight
If the horizontal stabilizer is this size then it will not catch air and will pitch up and down
Vertical stabilizer
Recommended size of vertical stabilizer for a stable flight
controls yaw and roll (left and right motion)
10-20% of the horizontal stabilizer size
30-50% of the wing area
10-15% of the wing area
20-25% of the wing area
30-50% of the horizontal stabilizer size
controls pitch (up and down motion)
60-70% of the horizontal stabilizer size
