Economics of FLEX T/O
Hello,
perhaps someone could enlighten me: firstly, is it true that in absence of any climb restriction, it is more economical in terms of total fuel burn, to use "high power" until the cruise level? In this case, usage of FLEX is motivated only by lower engine maintenance cost? If so, I would assume that the impact of T/O thrust setting on maintenance $$$ is known quantitatively? Could someone provide an example?
Thanks