12.58.20. Explain the requirement for using anti-balance tabs on an all-moving tailplane.

The anti-balance tabs improve control “feel” and prevents overbalance
‘The anti-balance tab moves on the opposite direction to the balance tab. If the trailing edge of the tail moves up the anti-balance tab also moves up
The movement of the tab is automatically provided through its linkage with the all-moving tail. t is also linked to the trim wheel

12.58.18. State the methods used to obtain aerodynamic balance.

Requirements:

Methods:
Inset hinges
Horn Balance
Balance Tabs

12.58.16. Explain the correct method for the use of trim controls.

These are devices to relieve the pilot from having to hold constant pressure on the control column
The main need for trim is in pitch and all aircraft are fitted with elevator trim
The correct method of trimming is to hold the aircraft in the attitude w=you want with steady controlled pressure on the control column and then trim this pressure off
The operation is in the directin that makes common sense ie trim forward – then move trim controls in same direction

12.58.14. Explain the requirement for the balancing of controls.

12.58.12. Explain the function of a basic trim control.

12.58.10. Explain the effects of airspeed and power settings on control effectiveness andaircraft attitude. 

Faster airspeed:
Faster airflow over the flight control surfaces will make them more effective, feel firmer and require less movement
Increasing the airspeed makes all the controls more effective
Increasing the power will increase the slipstream flow in which case only the rudder and elevator become more effective since slipstream does not flow over the ailerons

12.58.8. Explain the cross-coupling (further) effects of control in roll and yaw.

The primary effect of rudder is to yaw the aircraft
Its further effect is to cause a roll due to strong yawing to one side will speed up the outer wing which will then produce nore lift
The ailerons primary effect is to roll the aircraft and their further effect is to produce a yaw – as when the aircraft is banked it will tend to slip sideways into the resulting turn and the slipping action causes yaw

12.58.6(c) . yaw. 

12.58.6(b) . bank angle; 

12.58.6(a) . pitch attitude;