Green Dot
I realize its probably a difference of only a knot or two but is in not better to let the FAC calculate the Green Dot speed once it the aircraft is airborne. I believe that the FAC will calculate the real Green Dot speed by figuring out the actual weight of the aircraft (by calculating aircraft climb performance) at the time not by the weight entered out on the ground via the init page b (ZFW entry & Block Fuel) since we all know that standard numbers are usually lighter than actual.
Taken from FCOM:
The principle of the speed computation is as follows : First, the FAC computes VS1G (stall speed). From VS1G it computes the gross weight which is also sent to the Elevator Aileron computers :
When the aircraft is below 14500 feet and 250 knots, it computes this from current angle of attack, speed/Mach, altitude, thrust, and CG.
When the aircraft is above 14500 feet or 250 knots, it computes this out of the GW, which it has memorized and updated with a fuel consumption model set in the FAC.
Let me know if I am misinterpreting this.
Cheers
Last edited by airbuslad; 14th June 2002 at 08:43.