What is the minimum autopilot altitude for a takeoff on the Global Express?

• A. 200
• B. 400
• C. 600
• D. 800

Answer: (B)

Engage the autopilot no earlier than 400 feet above the runway. The Global Express’ procedures specify a 400 ft AGL minimum for coupling to the autopilot during takeoff, ensuring the crew maintains manual control during the critical liftoff and initial climb phases. This allows time to verify configuration, speed, and engine performance and to respond to any abnormal conditions before the autopilot assists with a stabilized climb. Lower than 400 ft would place control in the autopilot during a very sensitive phase, while higher values would delay the benefits of autopilot assistance beyond what the standard procedures require. Therefore, 400 feet AGL is the correct minimum.