Since I think these two are corelated (and I have some understanding of the CG now): What exactly doa.the ELF switch on the overhead (what do the speeds mean?)andb.the PMDG menu option for LSAS?Andreas

ELF is covered in the Systems manual, FLT.10.2. You remember that Boeing document Chock linked to? (I really hate committee reports, they are usually so badly written) It talked about an FAA requirement covering the forces that the pilot should feel on the stick? But it also talked about how the control forces could go neutral or even negative as CoG changed and as an aspect of airspeed? Well the ELF system is just a set of springs and a control system that tries to ensure that what the pilot "feels" remains legal and useful. Since the "feel" (and the corresponding self centering forces) is speed related, manual mode would allow the pilot to adjust the feel by adjusting the speed. I assume that this would only be done to compensate for damage or to test the system works, but a RW pilot could tell us more. As FS can not control the stick forces (except for limited force feedback effects), I do not think this system could be modeled any further then putting the appropriate messages on the display when the switch is thrown, but I could be wrong. The LSAS system is covered in the Systems manual, FLT.10.11. You will need to read this to make sense of the menu options which are covered in the introduction manual.