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Old 23rd Oct 2009, 04:35
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Spanner Turner
 
Join Date: May 2005
Location: Standing at P37
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Does anybody know where I can find the decceleration rates associated with the B752 autobrake settings.
Yes, I know where you can find that info - in the maintenance manual!

I don't have access to a 757-200 manual but can give you figures from some other Boeing products as a guide only.

747-400
1. 4.0ft/sec/sec
2. 5.0ft/sec/sec
3. 6.0ft/sec/sec
4. 7.5ft/sec/sec
MAX. 11.0ft/sec/sec
RTO. Full 3000psi hydraulic pressure to brakes-nil decel rate taken into account, braking limited only by anti-skid system.

767 (steel brakes)
1. 4.0ft/sec/sec
2. 5.0ft/sec/sec
3. 6.0ft/sec/sec
4. 7.5ft/sec/sec
MAX. 11.0ft/sec/sec
RTO. Full 3000psi hydraulic pressure to brakes-nil decel rate taken into account, braking limited only by anti-skid system.

767 (carbon brakes)
1. 4.12ft/sec/sec
2. 5.12ft/sec/sec
3. 6.12ft/sec/sec
4. 7.62ft/sec/sec
MAX. 11.12ft/sec/sec
RTO. Full 3000psi hydraulic pressure to brakes-nil decel rate taken into account, braking limited only by anti-skid system.

747-2/300
(options vary but our birds only had Min,Med & Max settings)
MIN. 4.0ft/sec/sec
MED. 6.0ft/sec/sec
MAX. Medium level(6.0) until NLG touchdown and then full 3000psi hydraulic pressure to brakes-nil decel rate taken into account, braking limited only by anti-skid system.


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