Gents,
Thanks for all your comments - but still a bit confused. I understand the FADEC setting the power required, even with one physical thrust lever position. But runway length has to come into the equation. So is this something picked up by the pilot from a chart, and inputted into the aircraft systems manually? If so, what piece of info does the pilot enter? Also understand the aircraft assessing ambient temperature (and weight?) automatically. Can the aircraft also determine the runway it is lining up on? (Obviously heading no problem, but can an aircraft yet distinguish between, say, 27L and 27R?)
Again, please forgive a keen amateur!!