What percentage of thrust does the APR provide compared to maximum thrust at ISA+20°C on the Challenger 300?

The Auxiliary Power Unit (APR) on the Challenger 300 is designed to provide a specific percentage of thrust relative to the aircraft's maximum thrust capabilities. At International Standard Atmosphere (ISA) plus 20 degrees Celsius, the APR is capable of delivering approximately 85% of the maximum thrust. This is significant as it allows the aircraft to maintain efficient performance during critical phases of flight, especially during takeoff and climb.

Understanding the performance characteristics of the APR is crucial for pilots and instructors, as it directly impacts the aircraft's operational capabilities in different environmental conditions. The percentage of thrust is determined through various performance charts and checks during training, allowing for optimized flight planning and safety considerations.