Thanks for all your inputs. I still cannot get my head around one point. If the WING is thinking it is flying 230kts at great height, ie IAS/CAS, despite a TAS of dramatically more, why is engine different. Isn't it experiencing the same INDICATED airflow into the intake as the wing is flying through? If straight and level at 100ft at 230kts requires 60% N1 (made up) then based on the confusion, why doesn't 230 kts at FL390 require 60% N1???? I understand that the air is less dense, but by flying a TAS of, I don't know, 454 kts, and therefore getting 230 kts indicated, if the wing doesn't know the difference between 100 ft and FL 390, why is engine any different? Why doesn't the high EAS/IAS of 230 kts mean engine is getting enough air? If engine is approaching starvation, how is wing happily thinking "I'm flying along at a lovely 230kts.."
Thanks in advance for your inputs and patience!