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Old 12th Sep 2007, 21:06
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Frankie_B
 
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Airbus Fly By Wire Question

Hi, gents

I've been reading various sources about the FBW behaviour, and still have the question about the FBW on the Bus

OK, it says that it will 'maintain 1.0g in pitch' with sidestick in neutral.
Effectively, 1.0g usually means lack of acceleration, so in this case, this would be lack of vertical acceleration, i.e. constant vertical speed?

On the other hand, some people are saying the Bus will maintain the FPA (flight path).

Now let's consdier a climb scenario.
Say we climb out at 140 kts and 1000 fpm, sidestick neutral.
Then I move the thrust levers to TOGA and accelerate to, let's say, 300 kts.
Will the aircraft pitch down to maintain the 1000 fpm climb, or will it adjust to maintain the same FPA, and hence increase vertical speed to something about 2000 fpm?

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