Depends on the temperature/pressure of the day. Any N1-managed engine will have a power management curve in which you enter with ambient conditions and look up the proper N1 for that day. (different temp or pressure => different air density!)
The N1 curve will have two separate regimes:
1) In the flat-rated regime, N1 increases with TAT and altitude, to maintain the constant flat-rated thrust (53K in this case). In this regime, rated TO thrust does not change; the changes in air density with temp & pressure are accounted for by adjusting N1.
2) Above the flat-rating break TAT, N1 decreases with TAT to protect the hot section.
PS - don't let "100% N1" confuse you. It's a purely arbitrary number - equivalent to 3500 rpm IIRC. This value means nothing except to the mechanical guys.
Last edited by barit1; 13th Sep 2006 at 12:29.