Airbus A350 XWB Flight test campaign
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@Stuck_in_an_ATR:
FOT (Flight Operation Telex) 999.0076/09 refers.
BUSS activation comes with increased workload (manual flight, manual cabin press control, some FMS functions not available)
Once you select BUSS, it is for the remainder of flight because you won't be able to identify the faulty source anymore.
Agree the BUSS is not compensated for Mach (as it is not compensated for speedbrake) but that is not the reason for the FL250 threshold.
BUSS activation comes with increased workload (manual flight, manual cabin press control, some FMS functions not available)
Once you select BUSS, it is for the remainder of flight because you won't be able to identify the faulty source anymore.
Agree the BUSS is not compensated for Mach (as it is not compensated for speedbrake) but that is not the reason for the FL250 threshold.
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Originally Posted by A33Zab
Agree the BUSS is not compensated for Mach (as it is not compensated for speedbrake) but that is not the reason for the FL250 threshold.
Last edited by HazelNuts39; 18th Jun 2013 at 10:14.
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What is noticeable is the increase in the number of probes and ports and also
how they have been regrouped and placed at the very front end ...
how they have been regrouped and placed at the very front end ...
That leaves the single AoA vane (other 3 are part of MFP) added in comparision with A380.
Don't know the exact reason, aerodynamical or accessibility for maintenance from inside the NLG wheel well?
Also the judiciary experts have noted that :
- Its utilization requests a lot of attention
- Its utilization is uneasy when changing the configuration
- Its activation is irreversible
- Its utilization requests regular training
- Increased workload.
- FCOM: S/F retraction, fly the top of the green area, for S/F extension, fly the bottom of the green area. Do not select CONFIG FULL.
- On ground it is fysical reversible, in flight I am not sure*), however it is procedural not reversible. See previous reply STUCK_ia_ATR.
- as should all extraordinary situations.
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@HN39:
Think we are in the wrong thread.
Absolutely correct, but no comment on that one by airbus.
A330 SW CLEAN:
NORMAL 23° (fixed value)
ALTERNATE/DIRECT 10.8° -7.0° (max Mach compensated) = 3.8°
BUSS 8.6°
Absolutely correct, but no comment on that one by airbus.
A330 SW CLEAN:
NORMAL 23° (fixed value)
ALTERNATE/DIRECT 10.8° -7.0° (max Mach compensated) = 3.8°
BUSS 8.6°
Last edited by A33Zab; 18th Jun 2013 at 11:08.
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I was not talking about icing. Nor BUSS.
I was talking about the airspeed sensed being lower than the real airspeed with fixed pitot probes when the AoA is high, due to the (big) angle between aircraft axis and aircraft trajectory.
If the probe (such as MFP) aligns itself with the relative wind (AoA = 0) then the sensed airspeed is "right".
My point simply was that I feel it's not a bad idea to have that.
I was talking about the airspeed sensed being lower than the real airspeed with fixed pitot probes when the AoA is high, due to the (big) angle between aircraft axis and aircraft trajectory.
If the probe (such as MFP) aligns itself with the relative wind (AoA = 0) then the sensed airspeed is "right".
My point simply was that I feel it's not a bad idea to have that.
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Originally Posted by AZR
If the probe (such as MFP) aligns itself with the relative wind (AoA = 0) then the sensed airspeed is "right".
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Will the 320NG be also equipped with the SSA and MFP ?
Are the SSAs playing a role in some protections ?
Regarding the BUSS :
I am also surprised it would not be reversible in flight as the only thing to do would be to initially stabilize the flight with a pitch and thrust and reengage one by one the ADRs and see how they make sense.
Are the SSAs playing a role in some protections ?
Regarding the BUSS :
Originally Posted by A33Zab
On ground it is fysical reversible, in flight I am not sure*), however it is procedural not reversible. See previous reply STUCK_ia_ATR.
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Will the 320NG be also equipped with the SSA and MFP ?
Are the SSAs playing a role in some protections ?
Are the SSAs playing a role in some protections ?
SSA is used for Y* Normal lateral law, don't know if its playing another role too.
@AZR:
The pitot of the MFP is fixed to its base and does not rotate 'into wind'.
@HN39:
The static ports (ISPs) are on an identical poistion as A330, only the Standby static ports are more on the side but is used for ISIS only.
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Other interesting reading: FAST A350special
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It made the pass over the Paris Airshow last Friday.
Everything went smooth according to Airbus, but it will be a long time before we get the details
Everything went smooth according to Airbus, but it will be a long time before we get the details