Secondary Flight Controls Flashcards
An increase of speed from the trimmed position at low speed has ___ of an effect on stick force than it does at high speed
more
Trim tabs move in the ___ direction as/to the main control surface
opposite
When the control column is moved forward, the elevator moves ___ and the trim tab moves ___
down, up
If you takeoff with the CG on the aft limit, and the trimmable horizontal stabiliser is set to the maximum nose down position, the rotation will be ___
normal
Outline the purpose of balance tabs
They provide aerodynamic balance and make it easier to move the controls by automatically moving the trim tab.
Balance tabs move in the ___ direction to/as the main control surface
opposite
Anti-balance/anti-servo tabs move in the ___ direction to/as the main control surface
same
Outline the purpose of anti-balance tabs
They increase the force required to deflect the control surface, aiming to prevent over deflection.
Outline how a servo tab differs from a trim tab
The servo tab aims to reduce stick forces, whilst the trim tab seeks to eliminate them altogether.
Servo tabs move in the ___ direction to/as the control surface
opposite
At ___ airspeeds, the spring tab will behave like a servo tab
high
Vmcg conditions
- Critical engine failure
- Take off thrust on the remaining engines
- Flaps for takeoff
- Rudder control only
Vmca conditions
- Critical engine failure
- Take off thrust on remaining engines
- Flaps for take off
- Gear up
- Zero yaw/AOB <=5 degrees towards the live engine
Vmcl conditions
- Critical engine failure
- Critical approach configuration
- Most unfavourable CG (i.e aft)
- Trimmed for approach with all engines operating
- MLM
- Take off power
Flap deflection will (in/de)crease the down-acting load on the tail
increase
