Quote:
Originally Posted by Stealth22
Correct me if I'm wrong, but I don't believe they use maximum braking and reverse thrust during normal landings either. In fact, I think (don't quote me on this), they normally use idle reverse, and do most of the work with the wheel brakes, to prevent wear and tear on the engines.
|
Normally a regular reverse thrust setting is used, with the option to use max reverse. Using idle reverse is actually fairly rare. In fact reverse thrust is used to minimize wear and tear on the brakes more than the other way around.
On takeoff, we usually use a very derated thrust setting. Every takeoff thrust setting is calculated for the weight, conditions, and runway length, and only the thrust that is needed to safely meet all takeoff run and climb criteria is used, allowing reduced noise, fuel burn, and engine wear. I won't bore you with too much detail, but it never ceases to amaze me that with big loads (fuel and guests) the amount of thrust reduction we normally use on the NG's. And if we do need to use full rated thrust, for example if there is some contamination on the runway (like snow), the performance is very impressive.
Hope that doesn't come across as too pedantic, but just some if you're interested info.