If runway limited, Auto brake MAX and immediately after touch down max manual braking.
The autobrake applies braking quicker than any one would.
The Autobrake at MAX will give you MAX hydraulic pressure(3000psi) at touchdown,ONLY when the first deceleration is sensed(speedbrakes/reversers) take effect will the autobrake reduce the braking force,therefore it is reasonable I think to expect full manual braking by at least the initiation of the other deceleration devices.
The reason why the distance is less with manual braking is that the Reversers deceleration force is ADDED to the the braking force rather than possibly reducing it.
Going to a limited runway with flaps up is asking for trouble obviously...
Last edited by de facto; 9th Jan 2013 at 12:43.