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Search: Posts Made By: Dupre
Showing results 1 to 35 of 38
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Forum: North America
8th Jan 2015, 10:19
Replies: 99
Views: 39,796
Posted By Dupre

haha my pleasure. The thread has forced me into...

haha my pleasure. The thread has forced me into sections of the fcom that I haven't been into in a long time and I have learned some things along the way. Also I have learned something about...
Forum: North America
7th Jan 2015, 02:17
Replies: 99
Views: 39,796
Posted By Dupre

1. Yes, you can select a speed all the way down...

1. Yes, you can select a speed all the way down to Vls if you desire, at any stage of flight including approach.

In this video they fly the whole approach in selected speed, and only managed speed...
Forum: North America
6th Jan 2015, 17:39
Replies: 99
Views: 39,796
Posted By Dupre

Hm good question. I believe that it will not...

Hm good question.

I believe that it will not go below O/S/F speed to meet a restriction.

And if the restriction is a faster speed than O/S/F, then the restriction is met anyway.

So setting a...
Forum: North America
6th Jan 2015, 02:19
Replies: 99
Views: 39,796
Posted By Dupre

target speed = speed it will maintain for you. ...

target speed = speed it will maintain for you.

It works just the same as if you select the speed.

Maintains the speed with pitch or thrust depending on your mode.
As discussed earlier,...
Forum: North America
5th Jan 2015, 02:49
Replies: 99
Views: 39,796
Posted By Dupre

ah yes I see your confusion. F/S/O speeds...

ah yes I see your confusion.

F/S/O speeds are not constraints.

But they are the target speeds, while in the approach phase (the FMGS). To fly them, your speed must be managed (Push the speed...
Forum: North America
4th Jan 2015, 19:34
Replies: 99
Views: 39,796
Posted By Dupre

O/S/F speeds do not appear on the FLT PLN, they...

O/S/F speeds do not appear on the FLT PLN, they do not appear on the ND.

The FMGS has no idea when you will select flaps. So it has no idea when you will be at what speed.

If you left it to...
Forum: North America
4th Jan 2015, 19:00
Replies: 99
Views: 39,796
Posted By Dupre

no worries. The managed speed is taken from...

no worries.

The managed speed is taken from the FMGS phase
Takeoff phase has V2
Climb phase has climb speed.
Cruise phase has cruise speed (well, ok its mach, not speed)
Descent phase has...
Forum: North America
4th Jan 2015, 17:27
Replies: 99
Views: 39,796
Posted By Dupre

To be honest the whole airbus logic is pretty...

To be honest the whole airbus logic is pretty hard to understand. For someone trying to get how it works with no formal airbus training, no experience in airbus aircraft and (at 14 years old)...
Forum: North America
4th Jan 2015, 13:23
Replies: 99
Views: 39,796
Posted By Dupre

The whole thing is challenging me to think about...

The whole thing is challenging me to think about some things in more depth than I would otherwise, and am learning some good stuff.

Anyway if the internet had been around when I was 14, I would...
Forum: North America
4th Jan 2015, 11:25
Replies: 99
Views: 39,796
Posted By Dupre

1. No, the amber = only changes if you change...

1. No, the amber = only changes if you change your flaps.
Conf0, amber= is at 230kt.
Conf1, amber= is at 200kt.
Conf2, amber= is at 185kt.
Conf3, amber= is at 177kt.
ConfF, amber= disappears.
...
Forum: North America
4th Jan 2015, 10:03
Replies: 99
Views: 39,796
Posted By Dupre

The amber= at 230kt is displayed all the time...

The amber= at 230kt is displayed all the time when
1. flaps 0
2. below 20,000 ft (Max flap operating altitude)

The F/S/O speeds are not managed as constraints, and are not in the flight plan. ...
Forum: North America
4th Jan 2015, 05:14
Replies: 99
Views: 39,796
Posted By Dupre

Passing an amber = does not mean you have to...

Passing an amber = does not mean you have to extend any flaps at all. It just means you can extend flaps if you want to.

Normally approach sequence goes....

1. Activate approach phase. ...
Forum: North America
3rd Jan 2015, 21:23
Replies: 99
Views: 39,796
Posted By Dupre

Angel "So while landing, you have to be below the amber...

"So while landing, you have to be below the amber = and F speed to retract your flaps?"
While on approach you will be extending your flaps. You only have to be below amber =

"So when you go to...
Forum: North America
3rd Jan 2015, 10:19
Replies: 99
Views: 39,796
Posted By Dupre

Ok so whether you are accelerating or...

Ok so whether you are accelerating or decelerating, you need to know at what speed you can extend or retract one more stage.

If you are accelerating, those speeds are F speed (to conf1) and S...
Forum: North America
3rd Jan 2015, 03:26
Replies: 99
Views: 39,796
Posted By Dupre

Wow thanks for that document m39462! Very...

Wow thanks for that document m39462! Very interesting to read.

Seems crazy that in turbulence, as soon as you reach A.prot, even if it just clicks over for a second, the plane will maintain it...
Forum: North America
3rd Jan 2015, 02:56
Replies: 99
Views: 39,796
Posted By Dupre

"What do you mean by target speed?" I mean the...

"What do you mean by target speed?"
I mean the speed autothrust will maintain if it is engaged.

"We have to be at 1 at S speed and at 2/3 at F speed? "
No there is no such requirement.
...
Forum: North America
2nd Jan 2015, 12:49
Replies: 99
Views: 39,796
Posted By Dupre

1) and 2) Yes. 3) and 4) No. F and S...

1) and 2) Yes.

3) and 4) No. F and S speed are simply the target speeds when in Conf 2/3 and conf 1 respectively, with approach phase activated.

On approach the minimum speed to fly is Vls.
Forum: North America
2nd Jan 2015, 01:58
Replies: 99
Views: 39,796
Posted By Dupre

Yes. The vertical trajectory can be an FPA, or a...

Yes. The vertical trajectory can be an FPA, or a Vertical Speed.

2. That makes sense and was what I originally believed, until reading about the requirement to disengage the protection. Now I...
Forum: North America
1st Jan 2015, 17:35
Replies: 99
Views: 39,796
Posted By Dupre

Now we are getting close! "Do you mean that...

Now we are getting close!

"Do you mean that in climb mode, AP/FD has to manage and control the speed? I had thought that A/THR will send to the AP/FD the pitch the plane should have...Do you mean...
Forum: North America
1st Jan 2015, 16:19
Replies: 99
Views: 39,796
Posted By Dupre

In CLB mode, autothrust sets THR CLB. That is a...

In CLB mode, autothrust sets THR CLB. That is a fixed thrust mode. The control of the pitch (to maintain airspeed in the climb) is the responsibility of the ELAC, following the guidance of the FDs,...
Forum: North America
1st Jan 2015, 12:20
Replies: 99
Views: 39,796
Posted By Dupre

The speed autothrust is trying to attain is...

The speed autothrust is trying to attain is always more than V.a.prot. If the thrust were sufficient, you wouldn't be at V.a.prot in the first place. Autothrust doesn't forget about it's target...
Forum: North America
1st Jan 2015, 11:04
Replies: 99
Views: 39,796
Posted By Dupre

You have mis-quoted me here... I never said "ELAC...

You have mis-quoted me here... I never said "ELAC has been programmed and knows if A/THR is ON or OFF. If A/THR is ON:
ELAC will pitch down at X° (programmed value). A/THR will keep managing the...
Forum: North America
1st Jan 2015, 02:03
Replies: 99
Views: 39,796
Posted By Dupre

Happy new year! The elac will pitch down to...

Happy new year!

The elac will pitch down to avoid going below v.a.prot, REGARDLESS of what athr is doing.
Forum: North America
31st Dec 2014, 18:16
Replies: 99
Views: 39,796
Posted By Dupre

haha that must make me a fake airline pilot?? ...

haha that must make me a fake airline pilot??

Flight detent is quite right, it will maintain v.a.prot in that situation. But until when is the question? I had thought protection will stop as...
Forum: North America
31st Dec 2014, 02:23
Replies: 99
Views: 39,796
Posted By Dupre

And the paragraph before the last quote ...

And the paragraph before the last quote

"Under normal law, when the angle-of-attack becomes greater than αprot, the system switches elevator control from normal mode to a protection mode, in which...
Forum: North America
31st Dec 2014, 02:21
Replies: 99
Views: 39,796
Posted By Dupre

Once again I learn something new. Quote...

Once again I learn something new.

Quote FCOM-27-20-10-20 HIGH AOA PROTECTION

"To deactivate the angle of attack protection, the pilot must push the sidestick:‐Greater than 8 ° forward,...
Forum: North America
31st Dec 2014, 00:51
Replies: 99
Views: 39,796
Posted By Dupre

"Are you 100% sure that ELAC simply pitches down...

"Are you 100% sure that ELAC simply pitches down the aircraft?" What else do you think it could do?

When high speed protections activate, the elac commands pitch up to prevent excessive...
Forum: North America
30th Dec 2014, 15:20
Replies: 99
Views: 39,796
Posted By Dupre

it really doesnt matter iv athr is o or off. ...

it really doesnt matter iv athr is o or off. The protection works the same way i.e. if speed decelerating to v.a.prot, elac orders pitch down so as yo avoid speed dropping any lower.

As for elac...
Forum: North America
30th Dec 2014, 01:48
Replies: 99
Views: 39,796
Posted By Dupre

1. Think of it like this: ELAC makes sure...

1. Think of it like this:

ELAC makes sure that the aircraft will not go BELOW V.a.prot/max. It is a minimum speed, not really a target speed as such. It will pitch down just enough to maintain...
Forum: North America
28th Dec 2014, 14:32
Replies: 99
Views: 39,796
Posted By Dupre

1. Load Factor is the vertical g force the...

1. Load Factor is the vertical g force the aircraft experiences. (Lift/Weight).

2. ELAC controls pitch. Athr controls thrust. The ELAC will only need to pitch down to avoid stall if the...
Forum: North America
28th Dec 2014, 11:17
Replies: 99
Views: 39,796
Posted By Dupre

1. Almost. V.a.prot and V.a.max take account of...

1. Almost. V.a.prot and V.a.max take account of current load factor (LF).

To correct your quote "But he/she pulled the stick, the LOAD FACTOR changed ---> V.a.prot moved up the scale to a speed...
Forum: North America
28th Dec 2014, 01:25
Replies: 99
Views: 39,796
Posted By Dupre

Talking haha yes I am... well at least i try to be one. ...

haha yes I am... well at least i try to be one. What is your interest in these questions? they are very detailed!

Did a youtube search and came up with this. ...
Forum: North America
27th Dec 2014, 19:11
Replies: 99
Views: 39,796
Posted By Dupre

1) Don't understand your question. What do you...

1) Don't understand your question. What do you mean by "Can we exit leave A/THR at Vfloor"?
(Also it is A.floor, not V.floor - is an angle of attack, not a speed. It is possible to get A.floor...
Forum: North America
27th Dec 2014, 11:15
Replies: 99
Views: 39,796
Posted By Dupre

Also I had a look today at the pitch attitude on...

Also I had a look today at the pitch attitude on the PFD in a moderately loaded A320. Cruise about 2deg up. Steep descent (High altitude, idle thrust, no speedbrake) 1deg nose down. Approach with...
Forum: North America
27th Dec 2014, 11:11
Replies: 99
Views: 39,796
Posted By Dupre

haha i am really having to read the book in depth...

haha i am really having to read the book in depth to get clear on all this now!

Firstly I must apologise for an error on point 4... you were correct and I was completely wrong, the thrust going to...
Showing results 1 to 35 of 38
 
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