Airbus sideslip crosswind
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Airbus sideslip crosswind
What about the rudder pedals? Wind from the right and right rudder applied?? That doesn't look good to me. What do you think? This is A330 official type rating training
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Yes, wind from right needs left rudder. I don't think the pictures are all supposed to tell a consistent story. It' just "topic of the day is sideslips! So here's a picture of some rudder pedals, here's a picture of a crosswind..." (Or if they are supposed to be consistent, there were bigger fish to fry than thorough quality control on this slide, and it's a simple mistake.)
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A320 strong crosswind from the right-hand side. Decrab applying left rudder...if the side stick is in the neutral position, the airplane automatically applies some upwind bank angle (rolls to the right) to zero the roll rate induced by the yaw correction. Am I right?
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This is the correct picture. Sidestick neutral, when the right rudder is applied to align with the RWY the aircraft AUTOMATICALLY lowers the upwind wing (left one).
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The text says "sideslip is automatically performed" so with sidestick neutral and rudder applied the sideslip is done automatically by the aircraft applying bank angle opposite to the rudder deflection. Why donīt you try it the next time you go to the SIM?
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The recommended de-crab technique is to use all of the following:
‐ The rudder to align the aircraft with the runway heading during the flare
‐ The roll control, if needed, to maintain the aircraft on the runway centerline. Any tendency to drift downwind should be counteracted by an appropriate lateral (roll) input on the sidestick.
In the case of strong crosswind, in the de-crab phase, the PF should be prepared to add small bank angle into the wind in order to maintain the aircraft on the runway centerline. The aircraft may be landed with a partial de-crab (residual crab angle up to about 5 °) to prevent an excessive bank. This technique prevents wingtip/sharklet (or engine nacelle) strike caused by an excessive bank angle.
As a consequence, this may result in touching down with some bank angle into the wind (hence
with the upwind landing gear first).
Last edited by vilas; 20th Sep 2020 at 18:17.
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Just to add to all the wisdom already published a quick read by Airbus.
Truth is no matter how knowledgeable you are, certain manoeuvres require a lot of practice to be mastered and need to be practiced regularly to avoid loosing the “grip”. Those Covid times possibly flying 1 - 2 times a month surely do not help.
Truth is no matter how knowledgeable you are, certain manoeuvres require a lot of practice to be mastered and need to be practiced regularly to avoid loosing the “grip”. Those Covid times possibly flying 1 - 2 times a month surely do not help.
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Correct, with rudder applied but wings level the aircraft will be sideslipping. I teach the FCTM method in the sim as quoted by Vilas in his reply above.
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Try in the sim autoland with 20kts crosswind. Keep the Flt Ctl page open and it will show you what it does.
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With side stick neutral the flight control laws maintain zero rate of roll. It will not bank but prevent the yaw from causing roll. FCTM below:
The recommended de-crab technique is to use all of the following:
‐ The rudder to align the aircraft with the runway heading during the flare
‐ The roll control, if needed, to maintain the aircraft on the runway centerline. Any tendency to drift downwind should be counteracted by an appropriate lateral (roll) input on the sidestick.
In the case of strong crosswind, in the de-crab phase, the PF should be prepared to add small bank angle into the wind in order to maintain the aircraft on the runway centerline. The aircraft may be landed with a partial de-crab (residual crab angle up to about 5 °) to prevent an excessive bank. This technique prevents wingtip/sharklet (or engine nacelle) strike caused by an excessive bank angle.
As a consequence, this may result in touching down with some bank angle into the wind (hence
with the upwind landing gear first).
The recommended de-crab technique is to use all of the following:
‐ The rudder to align the aircraft with the runway heading during the flare
‐ The roll control, if needed, to maintain the aircraft on the runway centerline. Any tendency to drift downwind should be counteracted by an appropriate lateral (roll) input on the sidestick.
In the case of strong crosswind, in the de-crab phase, the PF should be prepared to add small bank angle into the wind in order to maintain the aircraft on the runway centerline. The aircraft may be landed with a partial de-crab (residual crab angle up to about 5 °) to prevent an excessive bank. This technique prevents wingtip/sharklet (or engine nacelle) strike caused by an excessive bank angle.
As a consequence, this may result in touching down with some bank angle into the wind (hence
with the upwind landing gear first).
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With stick neutral for rudder application there is supposed to be no bank. The exercise in sim I mentioned is mentioned in Miami airbus Instructors meeting. When OEI demo is given with hands off it only banks 7° to 9° for same reason. It can't keep zero bank because yaw damper doesn't have that much authority.
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The answer is in the text at the bottom of your picture: the lateral controls attempt to zero the roll rate which means that they try to maintain the current angle of bank. If you want to lower the upwind wing youll have to do it yourself. The lateral controls will then attempt to maintain that.
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You are mentioning a condition "but wings level" ...This is not the case Iīm talking about. What Iīm saying is: fly wings level, A/P off, apply rudder, and see what happens (bank angle YES/NO which side??). I say R rudder bank angle to the left, L rudder bank angle to the right....