CS 22.49 Stalling speed

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

CS 22.49 Stalling speed ED Decision 2003/13/RM (a) VS0 is the stalling speed (CAS), if obtainable, or the minimum steady speed at which the sailplane is controllable, with: (1) landing gear extended; (2) wing-flaps in the landing position; (3) air brakes retracted or extended whichever position results in the lowest value of VS0; (4) maximum weight; and (5) c.g. in the most unfavourable position within the allowable range. (6) For a powered sailplane: (i) the engine idling (throttle closed); (ii) propeller in the take-off position; (iii) cowl flaps closed. (b) The stalling speed in the landing configuration must not exceed: (1) 80 km/h with: (i) air brakes retracted; and at (ii) maximum weight with water ballast tanks empty. (2) 90 km/h with: (i) airbrakes retracted, and at (ii) maximum weight with water ballast. (3) 95 km/h with: (i) airbrakes fully extended; and at (ii) maximum weight with water ballast. (c) VS1 is the stalling speed (CAS), if obtainable, or the minimum steady speed at which the sailplane is controllable with the: (1) sailplane in the configuration existing in the test in which VS1 is being used; and (2) weight used when VS1 is being used as a factor to determine compliance with a required performance standard. (3) For a powered sailplane: (i) the engine idling (throttle closed); (ii) propeller in the take-off position; (iii) cowl flaps closed. (d) Reserved. (e) VS0 and VS1 must be determined by flight tests using the procedure specified in [CS 22.201](#_DxCrossRefBm2056272046).