Hi guys,
well to be very honest we're trying to save even 1 kg of fuel, whether it means single engine taxi, CONF 3 landings (a320 family), keeping her in thrust idle from top of descent to glide intercept, packs off take off's, high speed climb, REV idle at touchdown. However i just wanted to point out that there's a trade off everywhere, eg. reverse idle at touch down, you heat up the brakes tremendously, single eng taxi would create large imbalances between left and right tank. Furthermore with a heavier aircraft on the day you would have to use more power on the live engine during turns, resulting in the same consumption. So the question is is it effective ?