Airbus Protection against rudder deflection under Normal Law...
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Airbus Protection against rudder deflection under Normal Law...
Given the well known pitch and bank protections under Normal Law, I was taken to believe that should an inadvertent full deflection of the rudder using the rudder pedals be done the systems would still prevent over banking and pitching, but I've been told that it's not really the case ( ? )
Imagine a scenario where, just after takeoff, already airborne and climbing towards acceleration height, full left or right rudder is input. What will happen regarding the yaw-induced roll ? What about the resulting pitch moments ? Would it be possible to "roll inverted" under such circumstances, or:
.) the forces required for any effective roll due to yaw are so huge that it would not be possible;
.) the protection logic also covers this sort of scenario.
Thank you for any hints
Imagine a scenario where, just after takeoff, already airborne and climbing towards acceleration height, full left or right rudder is input. What will happen regarding the yaw-induced roll ? What about the resulting pitch moments ? Would it be possible to "roll inverted" under such circumstances, or:
.) the forces required for any effective roll due to yaw are so huge that it would not be possible;
.) the protection logic also covers this sort of scenario.
Thank you for any hints
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Interesting one,
Yes, concerning the rudder, there is no protection (either in Norm, Alt, Dir laws)
But for sure, if you use full rudder deflection you may/will exceed VA.
For the rest of your question ????
Yes, concerning the rudder, there is no protection (either in Norm, Alt, Dir laws)
But for sure, if you use full rudder deflection you may/will exceed VA.
For the rest of your question ????
Last edited by Feather44; 13th Mar 2018 at 11:58.
Isn't that what the RTLU (Rudder Travel Limiter) is for?
When it fails things can go bad very quickly.
AirAsia Flight 8501 Crash Caused by Pilot Error, Rudder Units - Avionics
When it fails things can go bad very quickly.
AirAsia Flight 8501 Crash Caused by Pilot Error, Rudder Units - Avionics
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Thank you all guys for your answers / hints.
A situation in which inadvertent rudder deflection would be used, and the rudder limiter couldn't prevent is certainly extreme.
A situation in which inadvertent rudder deflection would be used, and the rudder limiter couldn't prevent is certainly extreme.
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I once had a student do the following: Slowed down to up speed ,pulled the nose gently up, promptly rolled towards 60 plus deg,THEN applied full rudder!
YeeeeeHaaaa, did she ever roll!!
On our back before I could say DONT!
After a quick sim reset we ended the A320 intro and moved over into the Dornier 328 Jet Sim were we actually were supposed to be!
Conclusion: You could possibly roll or at least invert an Airbus, but why would You!?
PS
The Dornier 328 was rolled in the alps on a empty sector.
Was not me!!
DS
YeeeeeHaaaa, did she ever roll!!
On our back before I could say DONT!
After a quick sim reset we ended the A320 intro and moved over into the Dornier 328 Jet Sim were we actually were supposed to be!
Conclusion: You could possibly roll or at least invert an Airbus, but why would You!?
PS
The Dornier 328 was rolled in the alps on a empty sector.
Was not me!!
DS
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I once had a student do the following: Slowed down to up speed ,pulled the nose gently up, promptly rolled towards 60 plus deg,THEN applied full rudder!
YeeeeeHaaaa, did she ever roll!!
On our back before I could say DONT!
YeeeeeHaaaa, did she ever roll!!
On our back before I could say DONT!
Now coming to the OP. When you don't apply rudder as in OEI in air or while removing the offset in strong crosswind landing if you observe on the flt ctl. page the spoilers deploy to prevent roll.
Last edited by vilas; 17th Mar 2018 at 02:05.