FMS AND CRUISE ALTITUDE FOR AIRBUS
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FMS AND CRUISE ALTITUDE FOR AIRBUS
Hi everyone,
I had this small question: If for example we enter FL360 as our Cruise level but we manually change an altitude of xxxx waypoint at FL380, will It automatically change our cruise altitude?
2) If we enter a step climb in one of or climb waypoints over our cruise altitude (of course, not realistic) will it also automatically change our cruise altitude?
In both case the waypoint xxxxx is TOC and TOD so Speed controlled By thrust (to shallow)
Thanks
I had this small question: If for example we enter FL360 as our Cruise level but we manually change an altitude of xxxx waypoint at FL380, will It automatically change our cruise altitude?
2) If we enter a step climb in one of or climb waypoints over our cruise altitude (of course, not realistic) will it also automatically change our cruise altitude?
In both case the waypoint xxxxx is TOC and TOD so Speed controlled By thrust (to shallow)
Thanks
Last edited by AF330; 6th Sep 2014 at 07:45.
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Depends on which a/c we talking about..
First answer,a/c forsure will change your cruise alt. automatically.
About second one,if aircraft on alt mode Airbus would just remind you about making a step climb as pop up a text msg to cdu.The altitude you set to the fcu is the essential input source to manage the a/c.As far as i know about boeing is beginning to descend if you pass over t/d point and set to fcu a lower alt;i dont have any idea about climb process..
If you mentioned cruise alt which is shown at fmgs,yes both cases it will change automatically.
Hope it works
First answer,a/c forsure will change your cruise alt. automatically.
About second one,if aircraft on alt mode Airbus would just remind you about making a step climb as pop up a text msg to cdu.The altitude you set to the fcu is the essential input source to manage the a/c.As far as i know about boeing is beginning to descend if you pass over t/d point and set to fcu a lower alt;i dont have any idea about climb process..
If you mentioned cruise alt which is shown at fmgs,yes both cases it will change automatically.
Hope it works
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1. No - to change cruise level it must be set on the FCU and the altitude selector pushed or pulled.
Cruise level can be manually set in the PROG page.
Overflying the waypoint will clear the constraint.
2. No - see above.
Cruise level can be manually set in the PROG page.
Overflying the waypoint will clear the constraint.
2. No - see above.
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But the matter to set alt constraint is differs to enter step climb.If the first question to enter fmgs as a constraint the answer is at above true but if you put step climb as a enrty to a fix,cruise alt would change.
But just to be sure cruise alt in real and cruise alt is shown at fmgs are quite different things.
Best regards
But just to be sure cruise alt in real and cruise alt is shown at fmgs are quite different things.
Best regards
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And yes, If we enter a step climb in managed mode it will also change our cruise if we enter one above our cruise altitude, right? And will it also change the altitudes of our other waypoints? thanks
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First question,with step climb it would change remaining waypoint's predicted alts.If its constraint it would be deleted as overflown.
Second no,noway to change alt cruise in real if you wont do change to your fcu alt and revert the autopilot mode(no matter its manage or selected) just you may change your predictions at all.
Hope it works
Second no,noway to change alt cruise in real if you wont do change to your fcu alt and revert the autopilot mode(no matter its manage or selected) just you may change your predictions at all.
Hope it works
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oh yes!!! i had forgotten that!! so basically if you are changing an altitude in the FMS during cruise, and then select it managed a,nd change FCU basically then only everthing will change! and if you are at FL360 and then change waypoint xxx at FL380 and enter in the FCU FL400 it will not go to FL380 but directely to FL400 right?
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Ok let me explain myself with 3 examples, here are my waypoints:
AGOPA: FL180
LORNI: FL220
MOPAR: FL240
BANOX: FL260
ORNIX: FL280
VADEK: FL320 (CRUISE ALTITUDE)
MERUE: FL320
SOKMU: FL320
KEREX: FL320
ROUEN: FL320
1) Ok, so we are in an A320/A330 and are climbing. We are over waypoint LORNI at FL220 and we enter in the MCDU STEP CLIMB (not at all realistic) from FL220 to FL330/MERUE. So the plane will go directely to FL330 till MERUE (we have entered FL330 managed in the FCU) and will automatically set FL330 as our new cruise altitude and will change waypoints SOKMU, KEREX, ROUEN to FL330, am I right for question 1?
2) You are at MERUE FL320, you cruise altitude and you change manually the altitude of KEREX to FL330, the plane will automatically set FL330 as new cruise altitude (with FL330 managed selected in the FCU). The plane will automatically change altitude of waypoint ROUEN to FL330. Am I right for question 2?
3) You are at SOKMU FL320 and you enter manually in the FMS KEREX FL170, but leave ROUEN as FL320. The plane will not descend and will delete altitude constraint of KEREX FL170. Am I right for question 3?
4) You are at MERUE FL320 (cruise altitude) and you enter in the FMS FL170 at SOKMU but leave ROUEN and KEREX at FL320. You enter FL30 in the FCU. The plane will start descending. But will it consider SOKMU as TOD and will automatocally change the other waypoints? What will happen for question 4?
AGOPA: FL180
LORNI: FL220
MOPAR: FL240
BANOX: FL260
ORNIX: FL280
VADEK: FL320 (CRUISE ALTITUDE)
MERUE: FL320
SOKMU: FL320
KEREX: FL320
ROUEN: FL320
1) Ok, so we are in an A320/A330 and are climbing. We are over waypoint LORNI at FL220 and we enter in the MCDU STEP CLIMB (not at all realistic) from FL220 to FL330/MERUE. So the plane will go directely to FL330 till MERUE (we have entered FL330 managed in the FCU) and will automatically set FL330 as our new cruise altitude and will change waypoints SOKMU, KEREX, ROUEN to FL330, am I right for question 1?
2) You are at MERUE FL320, you cruise altitude and you change manually the altitude of KEREX to FL330, the plane will automatically set FL330 as new cruise altitude (with FL330 managed selected in the FCU). The plane will automatically change altitude of waypoint ROUEN to FL330. Am I right for question 2?
3) You are at SOKMU FL320 and you enter manually in the FMS KEREX FL170, but leave ROUEN as FL320. The plane will not descend and will delete altitude constraint of KEREX FL170. Am I right for question 3?
4) You are at MERUE FL320 (cruise altitude) and you enter in the FMS FL170 at SOKMU but leave ROUEN and KEREX at FL320. You enter FL30 in the FCU. The plane will start descending. But will it consider SOKMU as TOD and will automatocally change the other waypoints? What will happen for question 4?
