Thanks for that info guys. One thing still puzzles me, the cost index in the FMS already controls the commercial trade off between speed and fuel consumption. I understood the FMS also modifies MRC to give the best range speed for the entered winds. If it is capable of providing all the benefits of LRC in the MRC selection what then is the point of having a separate LRC speed?
Last edited by Alex Whittingham; 3rd June 2002 at 11:14.