Reverse thrust at STN / EGSS
Join Date: Dec 2007
Location: I know EXACTLY where I am..
Age: 54
Posts: 97
Likes: 0
Received 0 Likes
on
0 Posts
Question from a bus driver
I always thought that all boeing autobrakes used a fixed braking force for a given autobrake setting, not like the bus which will produce a fixed deceleraton, modulating the brake force if reverse is used.
Please correct me if Im wrong.
regards,
OORW
Please correct me if Im wrong.
regards,
OORW
Join Date: Feb 2005
Location: flyover country USA
Age: 82
Posts: 4,579
Likes: 0
Received 0 Likes
on
0 Posts
I always thought that all boeing autobrakes used a fixed braking force for a given autobrake setting, not like the bus which will produce a fixed deceleraton, modulating the brake force if reverse is used.
Please correct me if Im wrong.
Please correct me if Im wrong.
Wouldn't it be nice if power management for TO was always set to achieve a known acceleration rate, based on R/W length and Vr (or some other speed)? You'd never be in coffin corner for TOGW error, brakes dragging, etc.
Join Date: Jan 2004
Location: Far away from LA
Posts: 1,032
Likes: 0
Received 0 Likes
on
0 Posts
barit1
Join Date: Feb 2005
Location: flyover country USA
Age: 66
Posts: 2,138
Wouldn't it be nice if power management for TO was always set to achieve a known acceleration rate, based on R/W length and Vr (or some other speed)? You'd never be in coffin corner for TOGW error, brakes dragging, etc.
Join Date: Feb 2005
Location: flyover country USA
Age: 66
Posts: 2,138
Wouldn't it be nice if power management for TO was always set to achieve a known acceleration rate, based on R/W length and Vr (or some other speed)? You'd never be in coffin corner for TOGW error, brakes dragging, etc.
yep this is called flex take Off...and you have a stopwatch for acceleration at 100 Kts..
Join Date: Aug 2001
Location: A few miles from the airport
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
OORW:
Boeing Autobrakes senses deceleration rate and modulates brake pressure accordingly. Application of reverse thrust will result in reduced braking pressure.
On the 737 NG the autobrake settings available are 1/2/3/max and RTO.
1 is equal to 1250 PSI and 4ft/sec scheduled deceleration
2: 1500 PSI 5 ft/sec
3: 2000 PSI 7.2 ft/sec
Max: 3000 PSI 14ft/sec above 80 kts. 12 ft/sec below 80 kts
RTO: 3000 PSI
Boeing Autobrakes senses deceleration rate and modulates brake pressure accordingly. Application of reverse thrust will result in reduced braking pressure.
On the 737 NG the autobrake settings available are 1/2/3/max and RTO.
1 is equal to 1250 PSI and 4ft/sec scheduled deceleration
2: 1500 PSI 5 ft/sec
3: 2000 PSI 7.2 ft/sec
Max: 3000 PSI 14ft/sec above 80 kts. 12 ft/sec below 80 kts
RTO: 3000 PSI