CS 29.1509 Rotor speed

• ED Decision 2003/16/RM found in: CS-29 Amdt 10 - Large Rotercraft (Jan 2023)

CS 29.1509 Rotor speed ED Decision 2003/16/RM (a) Maximum power-off (autorotation). The maximum power-off rotor speed must be established so that it does not exceed 95% of the lesser of: (1) The maximum design rpm determined under [CS 29.309(b)](#_DxCrossRefBm1513259404); and (2) The maximum rpm shown during the type tests, (b) Minimum power-off. The minimum power-off rotor speed must be established so that it is not less than 105% of the greater of: (1) The minimum shown during the type tests; and (2) The minimum determined by design substantiation. (c) Minimum power-on. The minimum power-on rotor speed must be established so that it is: (1) Not less than the greater of: (i) The minimum shown during the type tests; and (ii) The minimum determined by design substantiation; and (2) Not more than a value determined under [CS 29.33(a)(1) and (c)(1)](#_DxCrossRefBm1513259342). CS 29.1509 Rotor speed ED Decision 2003/16/RM (a) Maximum power-off (autorotation). The maximum power-off rotor speed must be established so that it does not exceed 95% of the lesser of: (1) The maximum design rpm determined under [CS 29.309(b)](#_DxCrossRefBm1178331792); and (2) The maximum rpm shown during the type tests, (b) Minimum power-off. The minimum power-off rotor speed must be established so that it is not less than 105% of the greater of: (1) The minimum shown during the type tests; and (2) The minimum determined by design substantiation. (c) Minimum power-on. The minimum power-on rotor speed must be established so that it is: (1) Not less than the greater of: (i) The minimum shown during the type tests; and (ii) The minimum determined by design substantiation; and (2) Not more than a value determined under [CS 29.33(a)(1) and (c)(1)](#_DxCrossRefBm1178331723). #### CS 29.1509 Rotor speed *ED Decision 2003/16/RM* (a) *Maximum power-off (autorotation).* The maximum power-off rotor speed must be established so that it does not exceed 95% of the lesser of: (1) The maximum design rpm determined under [CS 29.309(b)](#_DxCrossRefBm1685772257); and (2) The maximum rpm shown during the type tests, (b) *Minimum power-off.* The minimum power-off rotor speed must be established so that it is not less than 105% of the greater of: (1) The minimum shown during the type tests; and (2) The minimum determined by design substantiation. (c) *Minimum power-on.* The minimum power-on rotor speed must be established so that it is: (1) Not less than the greater of: (i) The minimum shown during the type tests; and (ii) The minimum determined by design substantiation; and (2) Not more than a value determined under [CS 29.33(a)(1) and (c)(1)](#_DxCrossRefBm1685772188).