ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
51. Take-off reference procedure
Edition: 2026-03-03 · In force
51. Take-off reference procedure
The take-off reference flight procedure shall be established as follows—(a)the helicopter shall be stabilized at the maximum take-off power corresponding to minimum installed engine(s) specification power available for the reference ambient conditions or gearbox torque limit, whichever is lower, and along a path starting from a point located 500 m prior to the flight path reference point, at 20 m (65 ft) above the ground;(b)the best rate of climb speed, VY, or the lowest approved speed for the climb after take-off, whichever is the greater, shall be maintained throughout the take-off reference procedure;(c)the steady climb shall be made with the rotor speed stabilized at the maximum normal operating rpm certificated for take-off;(d)a constant take-off configuration selected by the applicant shall be maintained throughout the take-off reference procedure with the landing gear position consistent with the airworthiness certification tests for establishing the best rate of climb speed, VY;(e)the mass of the helicopter shall be the maximum take-off mass at which noise certification is requested; and(f)the reference take-off path is defined as a straight line segment inclined from the starting point (500 m prior to the centre microphone location and 20 m (65 ft) above ground level) at an angle defined by best rate of climb and VY for minimum specification engine performance.