[SOLVED] Autopilot and route

[Urbanex]

Hi all,

I was following the tutorial and everything was going perfectly smoothly until I realised that instead of sticking to the 4500ft, my CRJ was climbing (reaching FL300)..., well that's only the first thing, bu then, I had the feeling that it was not following the route...

F/D are on, AP is engaged, my alt button pressed, hdg 030 locked, then turning to 60° to intercept the route... But my issue is that he does not stick to the altitude I entered (and I can't find a alt intv button ) and yeah that is pretty much it...

Am I doing sthg wrong?

Thank you,

Carlos

[Cameron]

Carlos,

1. Sounds like you do not have the alt pre-set correctly (please carefully follow the tutorial)

2. Be sure you are selecting the correct nav source (also in the tutorial) for the route to follow. If you do not have the correct nav source selected, intercepting the route will do nothing but go right through it.

[Urbanex]

Hi Cameron!

Thanks for your reply, well even when trying to set an altitude without the FMC, it does not do it...

F/D pressed, I press ALT and set the alt to 4500ft , at 1000ft, I engage the A/P but it still does not want to keep and maintain that altitude... :/

[eaglewing7]

Could it be that inadvertently you've set the target altitude to 45,000 feet, instead of 4500?

[Urbanex]

Hey!

No I don't think so :/

this is take off:

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this is climb:

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Expected cruise alt, but surprise, he keeps climbing:p

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Hum... I am probably doing something wrong but I don't understand what... :/

[eaglewing7]

Have you tried climbing with the vertical speed mode?  It looks like all you are doing is pitching up, and hitting the ALT button, which should work in theory, but for some reason I think you might be doing something else wrong...

Are you sure that the Autopilot is actually engaged, and on the AUTO mode and not just ON?

[Urbanex]

Hi Eaglewing7,

Thanks for your reply, but how am I supposed to put it in Auto mode? :/

[sthai]

Hi Urbanex,

You are too fast! AC tries to maintain speed limitations by pulling up.

Relax the throttle and all will be fine.

Best regards,

sthai

[KAPTEJNLN]

Yep have also tryeid it if it gets to close caused by wind. A hint try to keep the speed 10 to 15 kt below overspeed then you would se that it follows your comand  

[woweezowee]

Hi Urbanex,

You are too fast! AC tries to maintain speed limitations by pulling up.

Relax the throttle and all will be fine.

Best regards,

sthai

That's right. Speeding up happens very fast, I'm also still "fighting" against myself not monitoring the speed closely enough. Anybody has a setting that he eases the throttle back after takeoff? like.. 70, 85...? How you do it: Gear up flaps up first, then throttle, or otherwise?

[Cameron]

As others have indicated, too high a speed will contribute to an oscillated climb above any altitude you've selected to be held.

[Urbanex]

Okay,

Thanks all for your advice, I will check if that works! Shall I press the Speed mode then, in order to monitor the speed?

  ;D

[Japo32]

Okay,

Thanks all for your advice, I will check if that works! Shall I press the Speed mode then, in order to monitor the speed?

  ;D

Mmmmm Urbanex... has you read the documentation? If not, I suggest you read it before flying the plane, because that question about you should use speed for monitor speed......... mmmmm

[Urbanex]

Japo32,

Maybe I did not express myself properly, I mean, pushing the spd button to define a certain speed that the airplane will reach and stick to that speed.

No?

Carlos

[woweezowee]

no . you manage the speed yourself*. the autopilot function is for climbs/descent. You set the speed, give or take power, and the plane will climb or sink in order to maintain that speed. But when it reaches the altitude you preselected, the spd mode will disengage (and the plane will accelerate or slow down again, depending on your throttle settings).

in short: to avoid overspeeding, use your thottles wisely (still figuring that out myself. it is so much more difficult to control than the prop planes I am used to. soooo fast)

* other planes/autopilots may have the function "ATHR" (auto-throttle). That will control the speed for you also in level flight.

[Urbanex]

Oh well, my bad, he keeps the altitude if obviously I make him climb with VS, if not, well then he won't ha! >_<

[Japo32]

as said Carlos, please read the manuals.. it seems you don't know the plane.

Y en castellano... Por favor lease los manuales, por que parece que no controla mucho el avión al creer que el speed mode era solo para mantener la velocidad. Es un modo vertical. Dependiendo de la velocidad y la fuerza que imprima a los throttles, entonces el avión cabeceará más o menos.

Pero por favor, lease los manuales. Todo todito, todo está bien explicado allí y a creo que a nadie le gusta teclear dos veces lo mismo, que cuesta mucho esfuerzo.. si si solo fueran dos veces no habría problema, pero siendo unos cuantos los que lo podrían preguntar, pues como que me pasaría la vida respondiendo posts, y no trabajando.

Gracias!

[Urbanex]

Gracias Javier, pero no ablo español...! (I understood what you said though!)

Thank you!

Carlos

[Japo32]

strange with that name.. but ok.. sorry!!