Originally Posted by
chevvron
I noticed at Barcelona after a long taxy for departure in an Easyjet A320 (from their north side terminal via the western end of 07L/25R to the 27L hold) that we then started one engine just before departure.
Well, i highly doubt it was really "right before departure". I do not know their exact procedure, however, the engines need at least a warmup period of 3 minutes at or near idle until you apply take off thrust. But yes, they apparently have single engine taxi out as normal SOP, which is somewhat vexing for those taxiing behind them as they are usually very very slow indeed because of limited power on the live engine and only one available.