CS 22.415 Ground gust conditions

• ED Decision 2003/13/RM found in: Sailplane Rule Book - Part-SAO Part-SFCL CS-22 (Nov 2022)

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: <table border="1" cellpadding="0" cellspacing="0" width="602"><tr><td valign="top" width="104"><p><b>Control Surface </b></p></td><td valign="top" width="52"><p><b>k </b></p></td><td valign="top" width="446"><p><b>Remarks </b></p></td></tr><tr><td valign="top" width="104"><p>Aileron </p></td><td valign="top" width="52"><p>±0.75 </p></td><td valign="top" width="446"><p>Control column secured in mid-position </p></td></tr><tr><td valign="top" width="52"><p>±0.50 </p></td><td valign="top" width="446"><p>Ailerons at full travel</p><p>+ moment at the one, – moment at the other aileron</p></td></tr><tr><td valign="top" width="104"><p>Elevator </p></td><td valign="top" width="52"><p>±0.75 </p></td><td valign="top" width="446"><p>Elevator fully up (–) or fully down (+) or in the position in which it can be locked </p></td></tr><tr><td valign="top" width="104"><p>Rudder </p></td><td valign="top" width="52"><p>±0.75 </p></td><td valign="top" width="446"><p>Rudder at full travel right or left, or locked in neutral </p></td></tr></table>