Originally Posted by
Nightstop
Axel-Flo:
What a bizarre way of losing height with limited track miles. For a start, the A320 allows only approximately half speedbrake extension with autopilot engaged (even if the lever is selected to full). If you want full speedbrake extension you must first disconnect the autopilot. Secondly, the most effective method of losing altitude with reduced track miles is to keep the speed high, aircraft clean as long as possible to as low as possible, and then decelerate rapidly in level flight using Speedbrake, Gear and then flaps. So, if terrain, ATC and Company SOP permits the method would be selected MMO/VMO clean to 3000’ (say), activate Approach Phase, Managed speed then Speedbrake, Gear, Flaps. Use selected speed during deceleration according to taste.
On almost every aircraft flying max gear extended speed with gear extended yields a way better descend angle then flying V/MMO clean.