Navigate / EASA

CS 22.415  Ground gust conditions

ED Decision 2003/13/RM

The control system from the control surfaces to the stops, or when installed, the arresting devices must be designed for limit loads corresponding to hinge moments calculated from the expression:

where :

 =  limit hinge moment

   =  mean chord of control surface aft of hinge line

  =  area of control surface aft of hinge line

q    =  dynamic pressure corresponding to an air speed of 100 km/h

k    =  limit hinge moment factor due to ground gust, taken from the following table:

Control Surface

k

Remarks

Aileron

±0.75

Control column secured in mid-position

±0.50

Ailerons at full travel

+ moment at the one, – moment at the other aileron

Elevator

±0.75

Elevator fully up (–) or fully down (+) or in the position in which it can be locked

Rudder

±0.75

Rudder at full travel right or left, or locked in neutral