American 767 RTO at ORD

Good to know, we generally don't teach that because, at the end of the day… well, ya know.
 
Mostly.
LO brakes are applied 4s after touchdown* and decelerate at 1.7m/sec
MED brakes are applied after 2s at a rate of 3m/sec

Only felt MAX in the sim, and I hope you aren't taking a sip of coffee.



* when spoiler are activated, all things being equal, at touchdown.

Good to know, we generally don't teach that because, at the end of the day… well, ya know.

There's definitely a difference between good to know and need to know. AMF was the worst! "Let's draw out the air cycle machine" or "let's talk about the oil going through the prop system on the brasilia". (The most complicated system)
 
I'd argue that you can select 3 different braking modes. The difference between them is something you can affect, right?
 
I'd argue that you can select 3 different braking modes. The difference between them is something you can affect, right?

MAX stops the plane faster than MED, faster than LOW. That's all we need to know. As to the deceleration rate, and when it activates? We can't change it or affect it in any way, so not important.
 
We can get in to the weeds here.

Let's play this game:
Why would you ever select MED brakes o
 
We can get in to the weeds here.

Let's play this game:
Why would you ever select MED brakes o

OK. Whenever called for by your company SOPs, or, if allowed by the company, whenever you wanted to.

This is how we do it:

If we think we'll need to use auto brakes for a short/contaminated runway, plug the relevant data into the ACARS, and out comes data for stopping distances related to auto brakes settings. Apply some of that pilot skill and decision making and select one.

No where in that process do I need to know the deceleration rate or when it activated.

What do I win?
 
OK. Whenever called for by your company SOPs, or, if allowed by the company, whenever you wanted to.

This is how we do it:

If we think we'll need to use auto brakes for a short/contaminated runway, plug the relevant data into the ACARS, and out comes data for stopping distances related to auto brakes settings. Apply some of that pilot skill and decision making and select one.

No where in that process do I need to know the deceleration rate or when it activated.

What do I win?
A cake. An MRE pound cake.
IMG_0395.JPG

@Derg

Of course stump the chump and "I'm an molecule of ...." game is stupid.

However there are lots, and lots of buttons on aircraft that do things when you select them. I'm of the philosophy of knowing what the correlation to action is.
 
A cake. An MRE pound cake. View attachment 36969
@Derg

Of course stump the chump and "I'm an molecule of ...." game is stupid.

However there are lots, and lots of buttons on aircraft that do things when you select them. I'm of the philosophy of knowing what the correlation to action is.

I don't really get the reference, but that's aww'right aww'right aww'right.

The thing with trying to have a masters-level understanding of the Airbus is that without a maintenance manual, it's a fools game as a lot of functions are "bussed" together.

Personally, in my experience, the last jet I had a good handle on the "I'm an electron"-level systems knowledge was the MD-88 because it was a very manual aircraft with minimal automation and that annunciator generally meant one thing, compared to say LGICU1/2 on the big bus which was pages and pages of considerations and failures.

Every airline has it's "truisms". Our truism here at SouthernJets is that if you can't feel, taste, affect or see it, it's something we don't commit to memory. The man that signs the paycheck says it's so, and in our world, it's so.

It's different at other shops, which is fine.

It's french fries man. I think herbed European mayonnaise is delicious on fries, but there's always going to be someone across the room thinking I've lost my cotton-pickin' mind for foregoing ketchup.
 
Which has a greater deceleration rate: RTO or MAX autobrakes?
Boeing vs Airbus terminology. Same otherwise.
Let me be political here... I have no idea what Boeings deceleration rate is. I don't fly those antiquated bucket of bolts.

@Derg the pound cake is a jarhead-ism. Kind of like an inside joke, that's open to everyone I suppose. It was direct at chia, Capt. Poorly formatted response to both of you.

Don't be bashful in your yearning for knowledge. I bet the southern jets school house didn't teach how to find the AOA in the Bus, yet you learned where and how to find it, no?
 
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Someone probably said where to find it on the forum somewhere, but I literally have no use for the information at all.
 
Mostly.
LO brakes are applied 4s after touchdown* and decelerate at 1.7m/sec
MED brakes are applied after 2s at a rate of 3m/sec

Only felt MAX in the sim, and I hope you aren't taking a sip of coffee.



* when spoiler are activated, all things being equal, at touchdown.

Thank you! I knew I heard this rate somewhere. But even the feel between Medium and Low seems very different to me. Sometimes on Low I'm looking down wondering 'is this thing working?'. Sometimes even feel like clicking Medium even though the performance numbers say Low will work.
 
The way I took @Nark's 'quoted rate' was that there IS a big difference between the deceleration rate of Low vs. Med. The original post about the Bus's Low and Med were...'aside from the time of application, they are the same.' My initial reaction was...no way! You can feel the difference. Plus, assuming 2 seconds is not a lot of time(the difference between time of applications), what would be the point of having Low Med High? This will matter say from 31L Jfk vs. 22 at LGA.

And I completely liked @Nark's 'correlation to action' philosophy.
 
One other thing, this brings up the whole spectrum of Systems Knowledge. They range the gamut from 'building the airplane' to 'knowing nothing you can't affect from the Flight Deck.' I'm somewhere in between.

First walkaround after IOE. 'It would be nice to know a little bit about what I'm looking at here. 10 panels/access doors on the cowls and I don't know what they do.' So I dug a little into the books, ordered 'A320 Systems' off FB, which included explanations for every panel, grill, probe, etc. Much better doing a walkaround knowing a bit more about the outside of the airplane that I fly than the rampers. And that sorta correlates with those buttons you push.

The Skipper doesn't need to build the ship. But shouldn't the skipper know something about the ship he/she operates?
 
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