Airbus takeoff questions

[Icaro]

Hi All,

I have a few questions about Airbus and the various take off modes, especially in reference to what I would see on the E/WD. This isn't engine specific either.

So if I am performing a normal takeoff (not derated, not flex), do I see "TOGA" on the upper right corner of the E/WD? If I am performing a go around, would I see "TOGA" in the upper right of the E/WD?

For normal takeoffs, is there an N2 percent indication under the TOGA? For go arounds?

On the topic of Flex and derated takeoffs, from an operational standpoint, when do you use one over the other? I understand derated takeoffs have certified data in the AFM, and flex uses an assumed temperature but doesn't have certification data behind it.

I'm not a commercial pilot (PP-ASEL, glider), but I am working with FADECs and part of what I'm doing requires a little bit of knowledge on what the different thrust settings annunciate in the cockpit.

Thanks! I haven't been on the forums in a very long time. The look of the site has changed quite a bit and I see Doug is living his dream of flying monster jets across the ocean.

 

[crazyjaydawg]

I'm gonna need to see your passport and take a photo copy of it before I am allowed to answer this question.

Sincerely,
TSAed CFI

 

[dhood84]

I'm gonna need to see your passport and take a photo copy of it before I am allowed to answer this question.

Sincerely,
TSAed CFI

I hope your not being serious.

Derek

 

[jtrain609]

I hope your not being serious.

Derek

Security is always serious business.

 

[Itchy]

The thing that strikes me is, if you are in a position that you genuinely need this sort of data, wouldn't it be available?

 

[Icaro]

The thing that strikes me is, if you are in a position that you genuinely need this sort of data, wouldn't it be available?

No. The airframe and engine are two separate things. My view of the aircraft is really only restricted to the engine. I can't tell you anything about the airframe, its systems or its avionics. The only part of the airframe I'm concerned with is its interface with the engine. Within the engine itself I'm just concerned with the signals being processed in the FADEC, and don't really care about what is annunciated in the cockpit. I've found some Airbus safety presentations on derated takeoff, flex and go arounds which were helpful, but I'm still confused by whether or not TOGA is indicated on takeoff and, separate issue, when you'd choose derated takeoff over flex (just curious about that, as it is more an operational thing pilots would know about).

Pprune has some very high level pilot talk about that but it is somewhat over my head.

 

[sigler]

Hi All,

I have a few questions about Airbus and the various take off modes, especially in reference to what I would see on the E/WD. This isn't engine specific either.

1-So if I am performing a normal takeoff (not derated, not flex), do I see "TOGA" on the upper right corner of the E/WD? 2-If I am performing a go around, would I see "TOGA" in the upper right of the E/WD?

3-For normal takeoffs, is there an N2 percent indication under the TOGA? For go arounds?

4-On the topic of Flex and derated takeoffs, from an operational standpoint, when do you use one over the other? I understand derated takeoffs have certified data in the AFM, and flex uses an assumed temperature but doesn't have certification data behind it.

I'm not a commercial pilot (PP-ASEL, glider), but I am working with FADECs and part of what I'm doing requires a little bit of knowledge on what the different thrust settings annunciate in the cockpit.

Thanks! I haven't been on the forums in a very long time. The look of the site has changed quite a bit and I see Doug is living his dream of flying monster jets across the ocean.

I've numbered your questions so here are the answers:

1-yes (either that or just TO, not 100% sure since I don't fly the Bus anymore)
2-see above
3-no, you'll see either N1 or EPR on the Upper ecam, depending on what that engine type uses for power settings. It's always there and it shows you what the current limiting setting is (TOGA, MCT, CLB)
4-no derated takeoffs on the Airbus, at least not the ones I flew.. Just flex, which can reduce your takeoff power up to 25% below TOGA.

 

[Autothrust Blue]

Security is always serious business.

 

[Icaro]

I've numbered your questions so here are the answers:

1-yes (either that or just TO, not 100% sure since I don't fly the Bus anymore)
2-see above
3-no, you'll see either N1 or EPR on the Upper ecam, depending on what that engine type uses for power settings. It's always there and it shows you what the current limiting setting is (TOGA, MCT, CLB)
4-no derated takeoffs on the Airbus, at least not the ones I flew.. Just flex, which can reduce your takeoff power up to 25% below TOGA.

Sigler-

Thanks for clarifying it for me -- this was what I was looking for.