Originally Posted by
tdracer
Given that many large aircraft use main gear compression (aka "Weight On Wheels" or WOW) to enable various braking devices such as thrust reversers and spoiler/speed brakes, "aero-braking" could easily lengthen stopping distances by preventing timely use of the devices that are intended to slow and stop the aircraft.
From the current 777/787 Flight Crew Training Manual:
" After main gear touchdown initiate the landing roll procedure. Fly the nose wheels smoothly onto the runway
without delay..".......
" If nose wheels are not promptly lowered to the runway, braking and steering capabilities are significantly degraded
and no drag benefit is gained"..
(my emphasis)