Originally Posted by
tonywestsider
I also suspect that flaps down during runway roll after landing increases drag and supplements using spoilers to slow down the plane prior to moving on to a taxiway.
Yes, flaps result in more drag, but they also generate more lift. The increased lift makes wheel braking less effective (less weight on the tires). A technique for short-field landing is to raise the flaps (on the ground) to improve braking. This applies to small aircraft, I'm pretty sure not to large ones though.
Still, retracting flaps on the landing roll-out is normally discouraged. The landing and roll-out is a critical maneuver and demands all of the pilot's attention. You just don't want to be messing with other things during that phase.