Like it or not, technophobia is just not sensible in this case. Those "accurate" and "reliable" old school gauges you talk about are actually really not nearly as accurate, reliable, efficient, ergonomic, or useful as MFDs or PFDs. While a typical gyro attitude indicator usually fails every 400 hours or so, a PFD utilizing solid state gyros will last thousands of hours. The displays? Yeah, it'd be bad if one of them failed, but how often do you think that happens? Has it ever happened to your display? I've used various LCD
monitors, MFDs, and GPS units, and the only thing that's ever happened to me is one monitor shipped with one stuck blue pixel (none have since surfaced). And of course, in the aviation world we like to plan for the worst possible scenario imaginable. That's why both systems back each other up (the way it works in a 727, for example, is that one air data computer feeds the Cpt HSI and the F/O RMI
, while a separate air data computer feeds the F/O HSI and Cpt RMI
. It's no doubt even more reliable in the 787), both systems can be slaved to the other system in case one system fails, you have a compass (which won't fail, I'm betting), and you have your backup attitude indicator, which is powered by a battery (in case you lose all electricity). Oh, and if you lose electricity, a little turbine generator drops down which can provide electricity, and of course you have your APU. EDIT (I keep forgetting things): Also, ALL airplane instruments are powered by electricity. It's not a matter of computer displays using electricity while a traditional HSI doesn't, because they both do. If you lose electricity, you lose most of your instruments, not just your displays. The 787 will also not be the first to tote all computer displays, with no (or few) traditional gauges.
With regards to a couple of your other posts, the CR22 has Avadyne displays, not Garmin (technicality, I know), and the ERJ comes nowhere close to having the same size displays (not to mention that they're tube and not LCD
). Also look at the FMC screens. Huge! They look absolutely stunning. I can't wait to see what the final product looks like, especially when they drop the seat back garnishes that I think are probably just for show right now. No reason to stick on an extra 20 lbs of materials. 20 lbs may not be much, but 20 lbs here and 20 lbs there can make a big difference.
[Edited 2005-09-01 05:35:24]
I'm not pro-Boeing or pro-Airbus, I'm pro-crew all the way.