CS 22.345 Loads with air brakes and wing-flaps extended

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

CS 22.345 Loads with air brakes and wing-flaps extended ED Decision 2003/13/RM (a) *Loads with air brakes extended* (1) The sailplane structure including airbrake system, must be capable of withstanding the most unfavourable combination of the following parameters: <table border="1" cellpadding="0" cellspacing="0" width="529"><tr><td valign="top" width="198"><p><b>Equivalent Air speed </b></p></td><td valign="top" width="331"><p><b>VD (EAS) </b></p></td></tr><tr><td valign="top" width="198"><p>Air brakes </p></td><td valign="top" width="331"><p>from the retracted to the fully extended position </p></td></tr><tr><td valign="top" width="198"><p>Manoeuvring load factor </p></td><td valign="top" width="331"><p>from -1.5 to 3.5 </p></td></tr></table> (2) The horizontal tail load is assumed to correspond to the static condition of equilibrium. (3) In determining the spanwise load distribution, changes in this distribution due to the presence of the air brakes must be accounted for. (b) *Load with wing-flaps extended.* If wing-flaps are installed, the sailplane must be assumed to be subjected to manoeuvres and gusts as follows: (1) With wing-flaps in all landing settings, at speeds up to VF: (i) manoeuvring up to a positive limit load factor of 4.0; (ii) positive and negative gusts of 7.5 m/s acting normal to the flight path. (2) With wing-flap positions from the most positive en-route setting to the most negative setting, the manoeuvring conditions of [CS 22.333(b)](#_DxCrossRefBm2056272107) and the gust conditions of [CS 22.333(c)](#_DxCrossRefBm2056272107), except that the following need not be considered: (i) speeds greater than the VF appropriate to the wing-flap setting; (ii) manoeuvring load factors corresponding to points above the line AD or below the line GE of Figure 1. (c) *Speed limiting flaps.* If wing-flaps are to be used as a drag-increasing device for the purpose of speed limitation (air-brake) conditions specified in [CS 22.345(a)](#_DxCrossRefBm2056272106) must be met for all wing-flap positions. (d) When an automatic wing-flap load limiting device is used, the sailplane must be designed for the critical combination of air speed and wing-flap position allowed by that device.