CS 27.65 Climb: all-engines-operating

• ED Decision 2003/15/RM found in: CS-27 Amdt 9 - Small Rotorcraft (Dec 2021)

CS 27.65 Climb: all-engines-operating ED Decision 2003/15/RM (a) For rotorcraft other than helicopters – (1) The steady rate of climb, at VY must be determined: (i) With maximum continuous power on each engine; (ii) With the landing gear retracted; and (iii) For the weights, altitudes, and temperatures for which certification is requested; and (2) The climb gradient, at the rate of climb determined in accordance with subparagraph (a)(1), must be either: (i) At least 1:10 if the horizontal distance required to take off and climb over a 15 m (50 ft) obstacle is determined for each weight, altitude, and temperature within the range for which certification is requested; or (ii) At least 1:6 under standard sea-level conditions. (b) Each helicopter must meet the following requirements: (1) VY must be determined: (i) For standard sea-level conditions; (ii) At maximum weight; and (iii) With maximum continuous power on each engine. (2) The steady rate of climb must be determined: (i) At the climb speed selected by the applicant at or below VNE; (ii) Within the range from sealevel up to the maximum altitude for which certification is requested; (iii) For the weights and temperatures that correspond to the altitude range set forth in sub-paragraph (b)(2)(ii) and for which certification is requested; and (iv) With maximum continuous power on each engine. CS 27.65 Climb: all-engines-operating ED Decision 2003/15/RM (a) For rotorcraft other than helicopters – (1) The steady rate of climb, at VY must be determined: (i) With maximum continuous power on each engine; (ii) With the landing gear retracted; and (iii) For the weights, altitudes, and temperatures for which certification is requested; and (2) The climb gradient, at the rate of climb determined in accordance with subparagraph (a)(1), must be either: (i) At least 1:10 if the horizontal distance required to take off and climb over a 15 m (50 ft) obstacle is determined for each weight, altitude, and temperature within the range for which certification is requested; or (ii) At least 1:6 under standard sea-level conditions. (b) Each helicopter must meet the following requirements: (1) VY must be determined: (i) For standard sea-level conditions; (ii) At maximum weight; and (iii) With maximum continuous power on each engine. (2) The steady rate of climb must be determined: (i) At the climb speed selected by the applicant at or below VNE; (ii) Within the range from sealevel up to the maximum altitude for which certification is requested; (iii) For the weights and temperatures that correspond to the altitude range set forth in sub-paragraph (b)(2)(ii) and for which certification is requested; and (iv) With maximum continuous power on each engine.