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Old 15th Jun 2019, 19:56
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AerocatS2A
 
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Originally Posted by iat
Hi, I have an assignment in which I need to find the time and distance it takes for an A320 to brake from 30 knots to a full stop.

To do so I need to know the braking deceleration during taxi.

I have only been able to find the deceleration values for autobrake i.e.

LO - 2m/s2
MED - 3m/s2
MAX - 6m/s2

Am I right to say that autobrakes are off during taxi? What are the deceleration values of manual braking during taxi?

Thanks in advance.
MAX and manual should give the same values (5m/s/s in my FCOM.) MAX can’t be used for landing, it’s only for an RTO, but the point of MAX is that it is maximum braking. You don’t do an RTO using less than full brake pressure. However, the published deceleration rate is presumably an average for a full stop from high speed, ie either landing or a high speed RTO, and might not tell you much about stopping from 30 knots.
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