Brake 1 = Aircraft will stop in the mud.
Brake 2 = Aircraft will stop before the mud.
Brake 3 = Aircraft will stop well before the mud.
Brake 4 = Aircraft will stop in the shortest distance.
Brake 5 = Aircraft will blow some tyres and lots of paperwork to be actioned.
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Am note sure if Brake 5 is so good, however good luck to those who hav it fitted to their Aircraft and choose to use it.