BOAC
7th Mar 2010, 17:20
Ever since I began flying the 300 series in 1988 I have been convinced that there is a bizarre minor software bug in its pitch control in A/P and I wonder if this contributes to the much-stated abysmal speed control in descent.
Before I start, I must caution that you need to be one of those pilots who is blessed/cursed with the ability to detect small changes in a/c motion. I know from several discussions here on crosswind take-off aileron techniques with 'he who got himself canned' that there are some pilots who fly by numbers, and some, like me, who sense minute a/c motion from an amalgam of sensory inputs, visual, balance organs and audio, which probably accounts for the fact that my sim performance has for ever been far worse than my actual flying ability. :)
If you are one of the latter, try this experiment on a nice visual horizon.
In a steady, LVL CHG descent, wind the speed up or down a big chunk - it matters not which - and watch the nose pitch motion VERY CAREFULLY at the beginning. I'd be very interested to hear what you see.
Out of interest, we hear nothing here from the AB gang on this A/P mode - does that mean that the AB does not have the wild speed tendencies of the 737?
Before I start, I must caution that you need to be one of those pilots who is blessed/cursed with the ability to detect small changes in a/c motion. I know from several discussions here on crosswind take-off aileron techniques with 'he who got himself canned' that there are some pilots who fly by numbers, and some, like me, who sense minute a/c motion from an amalgam of sensory inputs, visual, balance organs and audio, which probably accounts for the fact that my sim performance has for ever been far worse than my actual flying ability. :)
If you are one of the latter, try this experiment on a nice visual horizon.
In a steady, LVL CHG descent, wind the speed up or down a big chunk - it matters not which - and watch the nose pitch motion VERY CAREFULLY at the beginning. I'd be very interested to hear what you see.
Out of interest, we hear nothing here from the AB gang on this A/P mode - does that mean that the AB does not have the wild speed tendencies of the 737?