Originally Posted by
airsp
Example : is it permitted to use IDLE REV + LOW ABRK on wet runways ?
The autobrake will give a constant deceleration.
For LOW: 1,7m/s2 (5.6ft/s2)
For MED: 3m/s2 (9.8ft/s2)
So if you select LOW for a dry or a wet runway, your stopping distance will be the same since your rate of deceleration is the same.
(However, on slippery runways, due to anti-skid operation, it is possible that you do not have this deceleration rate.)
Example:
Autoland distance with autobrake (For 60t, conf FULL):
Dry/LOW = 2130m
Wet/LOW = 2130m
No change for with or without reversers.
However,
Dry/MED = 1520m
Wet/MED = 1570m
No change for with or without reversers.
I assume this is due to anti-skid operation? Somebody correct me if I'm wrong.