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  #21  
Old 06-06-2009, 05:01 PM
Nesti (Mark)
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Quote:
Originally Posted by nightstalker View Post
fly by wire
that the removal of being able to feel how an aircraft is flying by the touch of a hand isn't a good thing.?

Holy smoly!!!

Nightstalker, you just hit me with a sledgehammer. You're absolutely right. In the old style, we use 'force gradients' to simulate increasing feedback as the range from centre increases. This was because the hydraulic system was so sensitive. But a strong enough force on flight controls can still give true feedback. So that was fine and gave nice feedback while still having full hydraulic assistance. However, fly-by-wire used simulated feedback, similar to a game controller on a Sony Playstation. Even a stall-shake is simulated. The feedback is derived from the flight computer information. If the flight computer has corrupted information (as with AF447), the feedback may well be out of proportion, or worse yet, opposite. The enunciated alerts are also derived from the same system. Flying VFR, aircrew would be prone to vertigo and misinformation, if not impossible.

At a critical time a pilot needs all the physical feedback he can get, not corrupted and negative feedback.

Airbus would already know this, but damn Nightstalker, you're a genius!

Do you guys see how serious this issue would be?
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  #22  
Old 06-06-2009, 05:04 PM
Nesti (Mark)
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Quote:
Originally Posted by Dennis View Post
I once did a 5 day aircraft safety course where some air crash investigators presented case studies. Those guys were a real bunch of sober, professional, smart and dedicated people wholly committed to discovering the cause(s) of accidents to prevent further recurrence.

I didn’t envy them their jobs, going in when there were still deceased people on the ground. I was astonished at their intensity, the length and intricacy of some investigations and how they sifted through everything, absolutely everything, in order to build a probable scenario of what contributed to the accident.

Cheers

Dennis

I couldn't do it as a career. Although satisfying, you're right, it would be a tough caper.
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  #23  
Old 06-06-2009, 08:39 PM
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leinad (Dan)
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An interesting analytical read, thanks Mark.
Let's hope they recover the BB, to find further answers to the tragedy.
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