Conditions:
747-200 Performance Manual
Engine: CF6-50E2
FL350 TAT-20
M.84 Cruise (260,000kgs, 4 Engs, Packs on):
Avg N1: 96.9
Limit N1: 106.4
Max Cont (FL350, TAT-20, M.84, 3 bleeds, 2 packs):
111.3
So, here are my thoughts:
Max continuous is only intended for engine out operations. And the manufacturer, in this case GE, has set a cruise N1 limit below max continuous probably for something as simple as preserving engine life.
In other words, we know the engine will make max continuous power but GE doesn't want us to set it for routine cruise operations.
How'd I do?
