I have been wondering how the autobrake works IRL, does the pilots set autobrake and let the aircraft slow down without touching the brake pedals like in fsx or do the autobrake system adjust how hard the brakes are applied when the pilots touch the pedals? Thanks for the answers Niklas Eriksson

the autobrake settings are to give you a fixed rate of deceleration (dont remeber the numbers off hand) this is regardless of reverse thrust is used. If you dont use the thrust reverse the brakes will work harder to slow you down at the same rate. This also would depend on the runway conditions. A Wet runway may not give the same deceleration rate as there may not be enough grip from the tyres.

Thanks for that information, but does the pilot have to press the brake pedals or is it like fsx that the aircraft brakes on its own? Niklas Eriksson

The brakes work on their own. If you were to touchdown and do nothing with the brake pedals, the plane would come to a stop. I typically set the brakes for the conditions and then override them via the pedals on a shorter runway or simply move the switch to off on a longer runway. A lot of pilots at my airline don't even use them unless it's braking action less than good and runway length less than 7000'.

Edited January 8, 201214 yr by Spin737

Oh i see so fsx is accurate in that point!

Matt, I was wondering, when disengaging the autobrakes, do you need to go past the power applied by autobrakes with your feet, or will a light tap suffice?

Matt, I was wondering, when disengaging the autobrakes, do you need to go past the power applied by autobrakes with your feet, or will a light tap suffice?

It's different on the Classics and the NGs. One you have to apply more pressure than the A/Bs are, and the others you can override more easily. I'll crack the books. . .I can't find the reference I'm looking for. Andrea will probably chime in. But, in either case, it's not a light tap. I think one system disarms if you apply more pressure than the A/B is for that setting and the other disarms if you apply more than MAX would.

Edited January 8, 201214 yr by Spin737

No need to crack the books, I was mainly asking because I heard different accounts. The fact that CL and NGs are different in this aspect explains why.

Oh i see so fsx is accurate in that point!

Only in that you don't need to touch the pedalst!!! In a real plane, if you set autobrake 3, you will decelerate at a specific rate - using the reverse thrust only helps save the brakes, but it doesn't slow you down any faster!! You won't 'feel' any difference. If you don't touch the brakes in a real plane and only open reverse thrust (on MOST aircraft), the deceleration won't be as much as you think, because it is not true 'reverse' thrust - it is sideways or slightly forward thrust. All they do is cut off any foreward thrust, and provide a 'wall of air' that helps aerodynamically slow the plane down. The few exceptions might be planes like the DC-9/MD- (which can push themselves backwards), or the clamshells on the Airbus. In FS, this is not the case - where reversers actually reverse and stop the aircraft. The landing distance in FS will be influenced with reverse thrust, but not in real life.

Edited January 8, 201214 yr by tasev1

Except that autobrakes work almost immediately after touchdown, whereas the TRs take a bit.

In FS, this is not the case - where reversers actually reverse and stop the aircraft. The landing distance in FS will be influenced with reverse thrust, but not in real life.

That depends completely on how is the autobrake programmed. It can work just the same in FS.I dont know if it does in PMDG, but you can do a little experiment. Save a flight about to enter ILS, so the conditions are always the same, ideally clear weather. Let the plane autoland and compare stopping distance with no spoilers/spoilers armed, no TR/spoilers, idle reverse/spoilers, full reverse.

Ops, I missed this topic as it was named "procedures in real life" and it is a pilot thing.Ok, lets start with the classic series:The autobrake can be disengaged either:-Autobrake selector to off-brake applied to give more than 750psi on the autobrake shuttle valve.-stow the speedbrakes-go around.On the NG they are similar, same pressure, same for speed brakes and so, but need the thrust lever advanced for more than 3 seconds for "go around mode"

Generally auto brakes operate after touchdown with the wheels doing appx 20kts