01A045

Takeoff thrust smaller than climb thrust

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Hello,

I notice that if I takeoff with exceptionally light weights during cold days, most 3rd-party performance calculators will give me de-rate takeoff thrust even smaller than the climb 2 thrust (e.g.: TO2/58C), and thus I experience a thrust increase at the thrust-reduction height. Can this happen in the real world? Or does the Boeing’s official performance calculator never give a smaller-than-climb2 T/O thrust?

Thank you!

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This is interesting but I do not think that the transition from thrust reference to climb 2 is a problem even if climb 2 is an increased N1.  I do not expect that any money making operator is going to fly an empty 777 very often.

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I can't find the video anymore, but I did see a video years ago where a lightly loaded Delta 757 was taking off out of LGA. At the thrust reduction point, you could hear the thrust actually increase. So yes, it can happen.

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