A320 questions, DAL A320 lines
05-31-2010 | 08:45 AM
#43
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From: B757/767
The change to flare mode occurs at 50' RA and it affects only pitch, not lateral control.
Airbus FCOM 1.27.20 Page 6-
"When the aircraft is in 'Flare' mode, the lateral control is the same as in 'in flight' mode."
Maybe it is due to my limited brain capacity, but I have found personally that it took five or six good crosswind landings to feel it out, and once I stopped thinking about what laws the airplane was in and just began to feel how the airplane was responding to my inputs I was able to get consistent decent crosswind landings.
Airbus FCOM 1.27.20 Page 6-
"When the aircraft is in 'Flare' mode, the lateral control is the same as in 'in flight' mode."
Maybe it is due to my limited brain capacity, but I have found personally that it took five or six good crosswind landings to feel it out, and once I stopped thinking about what laws the airplane was in and just began to feel how the airplane was responding to my inputs I was able to get consistent decent crosswind landings.
And I agree, you can't think about the laws. It took me a couple months, but I've got a good x-wind technique down. Flare around 50ft, no rudder until 5-10 ft & it'll roll right on.
05-31-2010 | 02:07 PM
#44
Where's my Mai Tai?
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From: fins to the left, fins to the right
Landing wings level may be technique and I won't argue with it, but the automation will land the aircraft with no/little crab with the wing down if an auto-land is performed.
From the A330 manual:
ALIGN SUBMODE
Align is a sub-mode of LAND that lines up the aircraft's axis with the ILS course at approximately 45 feet. Align sub-mode is not displayed to the crew.
Note: Align sub-mode is often known as "decrab" function.
If the aircraft aligned the yaw axis with the localizer at 45' and did not put a wing down I'm not sure how it would maintain centerline with a cross-wind. I have routinely touched down with a wing into the wing. There's even a call on all the Airbii that I've flown that is to be made by the PM/PNF if the bank angle exceeds 7 degrees. Additionally, the geometry limits for each type are published by Airbus an FYI (I guess) so that pilots know how much wing down they can use without scraping a wingtip or engine cowling.
From the A330 manual:
ALIGN SUBMODE
Align is a sub-mode of LAND that lines up the aircraft's axis with the ILS course at approximately 45 feet. Align sub-mode is not displayed to the crew.
Note: Align sub-mode is often known as "decrab" function.
If the aircraft aligned the yaw axis with the localizer at 45' and did not put a wing down I'm not sure how it would maintain centerline with a cross-wind. I have routinely touched down with a wing into the wing. There's even a call on all the Airbii that I've flown that is to be made by the PM/PNF if the bank angle exceeds 7 degrees. Additionally, the geometry limits for each type are published by Airbus an FYI (I guess) so that pilots know how much wing down they can use without scraping a wingtip or engine cowling.
05-31-2010 | 07:00 PM
#45
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No problem. Honestly I was thinking the same thing you were until I read this thread and decided to break out the FCOM to check. So I got my recurrent as well.
06-01-2010 | 11:17 AM
#46
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And another albeit analog FBW (FWIW, there was some consideration for a side stick controller also but engineers thought they were breaking enough new ground and deleted it. They did, however, add a force sensing mode to the yoke for jammed controls)
06-01-2010 | 04:55 PM
#47
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From: B737 CAPT IAH
The change to flare mode occurs at 50' RA and it affects only pitch, not lateral control.
Airbus FCOM 1.27.20 Page 6-
"When the aircraft is in 'Flare' mode, the lateral control is the same as in 'in flight' mode."
Maybe it is due to my limited brain capacity, but I have found personally that it took five or six good crosswind landings to feel it out, and once I stopped thinking about what laws the airplane was in and just began to feel how the airplane was responding to my inputs I was able to get consistent decent crosswind landings.
Airbus FCOM 1.27.20 Page 6-
"When the aircraft is in 'Flare' mode, the lateral control is the same as in 'in flight' mode."
Maybe it is due to my limited brain capacity, but I have found personally that it took five or six good crosswind landings to feel it out, and once I stopped thinking about what laws the airplane was in and just began to feel how the airplane was responding to my inputs I was able to get consistent decent crosswind landings.
I waited until inside 30 feet to apply rudder, the pitch became more like a convetional aircraft as it transitioned to Flare mode while you still made lateral correction via momentary side stick inputs for drift corrections. Lateral is still roll rate in the flare unless I flew a different Bus of the 320 family.
Lee
06-01-2010 | 05:12 PM
#48
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From: B737 CAPT IAH
Cheers
Lee
06-01-2010 | 05:16 PM
#49
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From: B737 CAPT IAH
Not surprising. Here is an early digital FBW machine.
And another albeit analog FBW (FWIW, there was some consideration for a side stick controller also but engineers thought they were breaking enough new ground and deleted it. They did, however, add a force sensing mode to the yoke for jammed controls)
And another albeit analog FBW (FWIW, there was some consideration for a side stick controller also but engineers thought they were breaking enough new ground and deleted it. They did, however, add a force sensing mode to the yoke for jammed controls)
Now someone tell me why Boeing still needs to make moving yolks and throttles in a FBW aircraft???
Lee
06-01-2010 | 07:42 PM
#50
No longer cares
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From: 767er Captain
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