I am not rated but the way I understand it is that the F/CTL computers will attempt to mantain present bank angle. Even if you were to cross the threshold with a 10° bank angle and then apply rudder without any sidestick input, the F/CTL computers will apply ailerons and spoilers to attempt to mantain 10° bank angle.
If you're level (0° bank angle), than the wings will be kept level as much as possible: the bank angle goes nowhere. It's 0. This is coming from someone that was about to change to Airbus and lurked in the books in his free time... |
Originally Posted by mi68guel
(Post 10890329)
I say R rudder bank angle to the left, L rudder bank angle to the right....
You're reading too much into the part of the quote that "a sideslip is automatically performed," which is poorly worded and doesn't mean anything. Forget about that. Aerodynamically, sideslip is any time the the relative wind is misaligned from the axis of the airplane when looking from above, aka beta angle is not zero. (Much like thinking about AOA, or alpha angle, when looking from the side). This is only a part of the sideslip (or forwardslip) maneuvers flown in small planes where the plane is cross-controlled so as to create an aerodynamic sideslip while preventing heading change. |
Originally Posted by Vessbot
(Post 10890354)
and nowhere in that does it say that it banks opposite.
You're reading too much into the part of the quote that "a sideslip is automatically performed," which is poorly worded and doesn't mean anything. I´m gonna stop answering. Can anybody please try it in the SIM and record it? Thanks |
performed by the plane I´m gonna stop answering. Can anybody please try it in the SIM and record it? Thanks |
Read Airbus Safety First issue #15
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Originally Posted by mi68guel
(Post 10890894)
It doesn´t say it because there´s a picture of an airplane sideslipping with stick in neutral
I´m not a native English speaker but it looks clear to me. sideslip is an intentional cross control manoeuver in which the pilot has made an aileron input in one direction with a simultaneous rudder input in the opposite direction. In this case, is not the pilot who does. It´s written that a sideslip is AUTOMATICALLY performed by the plane I´m gonna stop answering. Can anybody please try it in the SIM and record it? Thanks |
Mi68uel
You keep telling everyone to try it in the simulator. Why don’t you do the same? We’re all eagerly awaiting your report on the results! |
FBW
Originally Posted by Tail-take-off
(Post 10891530)
Mi68uel
You keep telling everyone to try it in the simulator. Why don’t you do the same? We’re all eagerly awaiting your report on the results! The Airbus does use G & Roll Rate, but it also takes into account G Rate. -From memory, CLB modes command different delta G depending on the change in Altitude selected -thats in the FCOM. Consider a similar situation to the Crosswind discussion; an Engine Failure at 50' in SRS with the AP engaged. The Flight Control Computers are perhaps taken by more of a surprise than the Pilot on a PC (!!) but Fifi gets upset and struggles to correct the roll and yaw for a good couple of seconds. Look at the FLT CTRL page. It's like the LED display on a 90's boombox. Under manual flight in VMC the maneuver can be performed more smoothly. The bottom line for crosswinds, just like Airbus says; is the jet is designed to land just like a Boeing. Thats why the ELACs introduce a pitch snapshot then command nose down. In a strong crosswind, rudder will introduce roll; given a couple of seconds the roll will be corrected; but in the flare at ten feet; we don't have a couple of seconds and the pilot actually has to fly the jet. Bank angle to correct drift et al.. PS. The Airbus does not have a yaw damper. It has a FAC that contains yaw damping functionality, but the FAC sends commands to the Rudder Hydraulics based on what it understands is going on.. |
[QUOTE] [PS. The Airbus does not have a yaw damper. It has a FAC that contains yaw damping functionality, but the FAC sends commands to the Rudder Hydraulics based on what it understands is going on../QUOTE] Not true at all. Airbus definitely has yaw dampers which work on G and Y hydraulics. If you loose G+Y you have FAC but loose yaw damping. Check FCOM Flt Ctl reconfiguration.
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Originally Posted by Banana Joe
(Post 10890333)
If you're level (0° bank angle), than the wings will be kept level as much as possible: the bank angle goes nowhere. It's 0.
This is coming from someone that was about to change to Airbus and lurked in the books in his free time... |
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