Originally Posted by
CW247
To my amazement yesterday, I dialed in a new altitude into the FCU window and pulled for Open Climb. 3 seconds later I selected a reduced speed (20 KTS less). The engines powered back to target the speed before climbing. Has something changed with the logic?
Twenty kts is a big reduction. Let's consider how else the system can do this. Once the system is locked in OP CLB the speed is controlled by pitching only. It is limited by maximum attitude so it will take longer to decelerate. More rapid speed reduction is achieved by throttling back and then resuming climb. When you dialled lower speed what was the N1?