1. Gliders in Flight Stability for Straight and Level Flight

2. Glider in Flight

3. Gliders Are Long Distance Fliers

4. Gaining Altitude • Glider do not have an engine • Use rising air to gain altitude

5. Balsa Glider Flight • Straight and Level = Maximum Distance

6. Three axis of movement

7. Movement in Yaw

8. Movement in Roll

9. Movement in Pitch

10. Static Stability

11. Dynamic Stability

12. Lateral Stability: Roll • High wing aircraft are naturally stabilizing

13. Lateral Stability: Dihedral

14. Why does dihedral work?

15. Why does dihedral work? Uniform Lift Weight

16. Why does dihedral work? Weight Component of Weight Causing a Sideslip

17. Why does dihedral work? Rolling Moment Lower Lift Lower AOA Higher Lift Higher AOA Induced Relative Wind

18. Lateral Stability: Types of Dihedral No Dihedral Straight Dihedral Tip Dihedral Polyhedral

19. Movement in Yaw

20. Directional Stability: Keel Effect

21. Directional Stability: Weather Vaning

22. Directional Stability Moment Arms

23. Directional Stability

24. Movement in Pitch

25. Avoiding the Stalling

26. Center of Lift Weight and Balance Balanced, but easy to shift… VERY nose heavy! VERY tail heavy! Weight at Center of Gravity

27. Center of Gravity Range