I have thought about that issue, and it crossed my mind that maybe they want the aircraft to be flying at a speed away from the backside of the speed curve in order to achieve speed stability, but then again that should also apply to all other engines i mentioned.(which doesn't)
In addition, what really blew this assumption for me was this statement from the FCOM.
"Green dot speed in clean configuration and S in CONF 1 are speeds between the minimum fuel speed and the minimum drag speed.
These charts are established with air conditioning in normal mode and the center of gravity at 33 %.".
and yet the tables use GD for CFM and GD+20 for V2500!!!
Last edited by heggo48; 19th September 2013 at 17:08.
Reason: Inaccurate wording