747-400 Manoeuvre Margin
I've been trying to figure out how the 747-400 computes the maneouvre margin. The question may have been answered before, but there are 101 ways of spelling manoeuvre :P
My manuals say that when the flaps are not up, the source of the manoeuvre margin is the Stall Warning Cards (SWCs). The SWCs feed data to the FMCs and the data goes straight through without interference to the EIUs/PFDs
Is aircraft weight required for the manoeuvre margin? If so, how do the SWCs get this information. All I see in the schematics is a Vbflo signal going from the FMCs to the SWCs (but this data doesn't seem to be used for manuoeuvre margins).
Are lookup tables and raw data, such as AOA, altitude, speed, etc, all that is required for manoeuvre margin computations with the flaps down? (not crew FMC weight entry)