Automatic Category A Takeoff, Reloaded - Development and Flight Testing of the Clear Area Takeoff Procedure on the H145

Abstract:
An automatic clear area takeoff mode is developed and initial flight tested for the Airbus Helicopters 5-bladed H145, certification name BK117 D-3, equipped with the Helionix® avionic system and a 4-axis automatic flight control system. While the automatic rearward and vertical takeoff modes are already certified up to the maximum Cat A weight, the clear area procedure - often providing the highest performance in terms of gross weight - currently requires manual execution. The introduction of an automatic clear area takeoff mode ensures a repeatable, procedure conform clear area takeoff profile while respecting engine limits and reducing overall pilot workload. The paper details the integration of the automatic clear area takeoff mode into the existing automatic flight control system, covering automatic clear area normal, continued, and rejected takeoff procedures. Initial flight test results are presented to demonstrate the consistency of the automated flight path and the ability to provide timely and correct responses to simulated engine failures, thereby enhancing overall operational safety.

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