Originally Posted by
Weapons Grade
Can someone provide the reference to the FBW architecture for reduced gain in F-FULL, which would make F-FULL less sensitive than F-3? From my experience, F-3 gives better handling and response in turbulence, than using F-FULL (less drag with F-3).
Hi Weapons Grade,
This picture
Roll Kinematics (from an incident report of A320 with handling difficulties in Hong Kong many years ago) shows the change in roll spoiler response with handle at Flaps Full.
Initially for roll orders up to about 7 degrees, the spoilers are far less responsive (but are activated 3 degrees earlier than CONF 3)
Beyond 7 degrees and up to about 11 degrees of roll order, the spoilers are a bit more responsive but still only about half that of CONF 3. (11 degrees of roll order v 6 degrees of roll order for 10 degrees of spoiler deflection)
Beyond 11 degrees the spoilers become more sensitive and full authority is restored at 20 degrees roll order.
I can't find the report just yet, (see
Aviation Safety Net) but from memory Airbus changed the ECAM procedure.
"APPR PROC S/F JAMMED PROC APPLY FOR LDG (IF FLAPS ≤ 3) USE FLAP 3
This line is replaced by “FOR LDG : USE FLAP 3” when CONF 3 is selected, as a reminder
FLAPS (IF FLAPS>3) KEEP CONF FULL."