777 autobrake settings "max auto"

[FS737Pilot 12]

If you look at the autobrake knob for the 777 the maximum setting is called "max auto". What does the 'auto' aspect effect?

[Swofford 155]

Maximum Autobrake. A step up from 4 would imagine its a pretty hard braking for short runways.

[FS737Pilot 12]

Maximum Autobrake. A step up from 4 would imagine its a pretty hard braking for short runways.

 

I understand the Max part, its the word auto that I'm not sure of. On the 737 it just says Max so Im just wondering if the word auto means something more than just saying maximum autobrakes.

[Swofford 155]

Just Autobrake.

[EGLL77W 1,508]

It's simply a step up from Autobrake four.

[EGLL77W 1,508]

Something to add, my friend that flies the fleet says maximum manual braking is harder than Max Auto.

[aceridgey 330]

Something to add, my friend that flies the fleet says maximum manual braking is harder than Max Auto.

 

That's correct.

 

Max manual breaking is 'better' than max auto brake

[Airbusman330 300]

 

 

That's correct.

 

Max manual breaking is 'better' than max auto brake

 

If the system provides maximum braking pressure then how can a pilot do any better? He can't exceed the maximum pressure that the hydraulic system can handle.

[Swofford 155]

It doesn't use the maximum potential of the brakes it is Maximum under Autobraking. Manual braking can provide quite a bit more for emergencies I would imagine.

[Jetstream96 20]

If the system provides maximum braking pressure then how can a pilot do any better? He can't exceed the maximum pressure that the hydraulic system can handle.

 

Probably the computer won't apply full pressure. It's true that max manual is more powerful than max auto. You can find that statement in 777 manual.

[aceridgey 330]

If the system provides maximum braking pressure then how can a pilot do any better? He can't exceed the maximum pressure that the hydraulic system can handle.

 

Because max auto is not the maximum that the aircraft potentially has.

 

Added to max reverse thrust [rarely used], one would get the minimum stopping distance

[Airbusman330 300]

 

 

Because max auto is not the maximum that the aircraft potentially has.

 

Added to max reverse thrust [rarely used], one would get the minimum stopping distance

 

I don't have the manual but I guess it varies with aircraft. I'm only talking about braking pressure not reversers or other stopping tools.

[aceridgey 330]

I don't have the manual but I guess it varies with aircraft. I'm only talking about braking pressure not reversers or other stopping tools.

 

Remember that:

 

If the scenario is autobrakes 2 and the aircraft is on the runway, if one selects full reverse, then the brake pressure will reduce.

 

So full reverse only reduces the load on the 'auto' brakes, it doesn't reduce the stopping distance.

[Airbusman330 300]

 

 

Remember that:

 

If the scenario is autobrakes 2 and the aircraft is on the runway, if one selects full reverse, then the brake pressure will reduce.

 

So full reverse only reduces the load on the 'auto' brakes, it doesn't reduce the stopping distance.

 

I understand how the logic works but I'm talking about a scenerio where the reversers won't function for whatever reason amd all you have are the brakes and spoilers.

[Ralgh 43]

I understand the Max part, its the word auto that I'm not sure of. On the 737 it just says Max so Im just wondering if the word auto means something more than just saying maximum autobrakes.

 

Boeing is not consistent between their different planes. For example the 737 has Level Change button where the 777 is Flight Level Change. The 737 has a Fasten Belts switch where the 777 is Seat Belts. That's just two things off the top of my head.