A second initial 4D (i4D) trajectory flight trial has been conducted as part of a joint project by members of the European Union-funded Single European Sky ATM Research (SESAR) Joint Undertaking (SJU). The first flight trial was in 2012. This second flight trial was conducted using Airbus’ A320 flight-test aircraft, MSN001, with a Honeywell flight management system (FMS) on the outbound leg from Toulouse via Copenhagen to Stockholm, and a Thales FMS on the return journey. Its goal was ...

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