A320 Beta Target
Hi
Question regarding ELACs and Beta Target on A320/321. Scenario - ELAC 1 U/S at dispatch (permitted acc. MEL) Engine failure on T/O. When Beta Target becomes active, indication turns blue but sticks and does not react to rudder input. Is this behaviour correct? What does ELAC 1 provide to help in the calcuation of the beta target? Why does ELAC 2 not take over this functionality when ELAC 1 is U/S? All info gratefully received. ffs |
Is that an experience or it is supposed to happen that b target freezes in an engine failure when ELAC 1 is u/s?
ELAC 1 and 2 gives turn coordination and yaw damper commands to the FACs. FAC 1 executes. something else went wrong |
I observed this in a sim but question whether the behaviour is correct or not. No other malfunctions were active. Could be a sim logic problem or it could be like that on the aircraft. Need to find out one way or the other.
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Hi there!
As far as I am concerned, ELAC 2 would send enough information to FAC 1 to execute the Beta Target correctly. it could be a Sim glitch... especially because it doesn't mention anything in the ELAC 1 MEL about possible effects on the Beta Target. Regards. |
I can't see how things happen exactly:
ELAC 1 lost, then ELAC 2 sends yaw orders to FAC 1, and FAC 1 controls rudder? or ELAC 2 sends orders to FAC 2 and FAC 2 controls the rudder? anyway, it looks like a glitch. by the way, which computer actually calculates beta target? FAC? |
FCOM 1.27.20 SIDESLIP TARGET Even small lateral sidestick inputs can make beta target very sticky. |
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