Originally Posted by
RocknRola87
As you pointed out, on the B737NG the AMM states allowable DRAG FACTOR entry range is -9.9 to 9.9 . The same apply to the F-F fuel flow factor .
That was my recollection for the whole range of Boeings, from the B737 through 744, 75, 76 77 and the 78. Was surprised that the A320 seems to accept the higher values, which is helpful to me, sucks for Boeings.