From Belgique's post:
d. Have the autobrake cut-in dependent upon G/A sensing circuit #1 plus G/A sensing circuit #2 (which is nosewheel oleo depression micro-switch actuation by NLG ON). That stops brakes cutting in while NLG is still airborne and causing a heavy nose hit de-rotation. And there is a difference between maximum wheel-braking and maximum effective aircraft braking. For the former, standing on the toe-pedals will just produce wheel-lock and tire-skid on a contaminated runway (i.e. ineffectual for stopping). In the latter case, minimizing the brakes release time of the anti-skid by maximizing the weight on the wheels will stop you in the shortest distance. Despite the NTSB finding on the 182kt Burbank touchdown, that max wt on wheels will be achieved by an autobrake married to some hefty back-stick introduced after the nose-gear is on. MLG braking produces a strong nose-down pitching moment and the backstick counters that. The important and oft-overlooked nett effect is that the MLG gets pushed into the deck...... for the very best auto-braking on slick runways.
e._Increase spoiler panel size and deployment rate => increased effectiveness for lift-dumping, => earlier weight-on-wheels for avoiding aquaplaning and maximizing tire rotational torques (which minimizes auto-brake cycling). The less frequent the brake-valves have to modulate to permit continued wheel-spin, the more effective is the auto-braking. This would also make for safer take-off aborts. To blow the tire you must first stop the wheel (is the practical aspect). That's least likely to happen if you maximize weight-on-wheels courtesy of the spoilers. What else can you do to maximize weight-on-wheels? Per d. above, use back-stick once you are on to stay and braking is heavy. Up elevator forces the main-gears down into the ground. Conversely, forward stick (down elevator) would induce wheel-barrowing. Stopping effectively is a real science.
The bits in blue (
increasing effective weight on wheels via backstick under braking) is something I'd not thought about or been taught. T'would seem quite logical and valid as far as techniques go.
Thoughts?