1. 6.02 Flight Controls References: FTGU pages 30-31
Theory of Flight
6.02 Flight Controls
References:
FTGU pages 30-31

2. 6.02 Flight Controls MTPs: Axes of an Airplane Movements
Function of the Controls
Flutter
Balancing Controls

3. Review
Label the airplane!

4. Review
What kind of construction are these?

5. Review
How would you describe these aircraft?

6. Review What do the following terms mean? Wingspan Chord Planform
Aspect Ratio
Angle of Incidence
Relative Airflow
Angle of Attack
Airfoil
Camber

7. Axes of an Airplane

8. Movements

9. Movements Roll – movement around longitudinal axis
Pitch – movement around lateral axis
Yaw – movement around vertical/normal axis

10. Function of the Controls
Ailerons cause
movement around the
longitudinal axis
This movement is
called roll.

11. Function of the Controls
Ailerons are controlled using the control column
Control column RIGHT = right wing down
Control column LEFT = left wing down

12. Function of the Controls
The elevator controls
movement about the
lateral axis
This movement is
called pitch.

13. Function of the Controls
Elevators are controlled using the control column
Control column FORWARD = nose down
Control column BACK =nose up

14. Function of the Controls
An alternative to the elevator is the stabilator
It is controlled the same way the elevator is
The entire horizontal stabilizer moves to act as an elevator

15. Function of the Controls
The rudder controls
movement around the
vertical axis.
This movement is
called yaw.

16. Function of the Controls
The rudder is controlled using the
rudder pedals
Right rudder pedal = yaw right
Left rudder pedal = yaw left

17. Flutter What is flutter?
Rolling or weaving motion arising from deflection of a part of the airplane structure that causes the air forces on it to change in synchronism with its natural period of vibration
Control surfaces must be balanced properly to prevent flutter!

18. Balancing Controls Balancing control surfaces to help pilots move them
Examples:
Inset hinge balance
Rudder horn
Aileron hinge axes

19. Balancing Controls

20. Balancing Controls
Addition of mass (usually made of lead) to control surfaces to prevent flutter
Example:
Lead mass added to rudder horn of glider

21. Balancing Controls
A control surface has balance about it’s centre of gravity without airflow over it
Improper weight distribution can cause flutter
Static balance must be checked when control surface is repainted

22. Confirmation Draw and label the three aircraft axis.
Which movement occurs around each axis?
Which control surface is used for each movement?

23. F-35B Hovering