[Jorge]

I see big potential problems with electrical aspects of the carbon-fiber composite and those thin (and more flexible) outer wings could have some surprising (and catastrophic) flutter characteristics.

I thought carbon-fiber composites were already being used in existing large commercial aircraft, specifically in the wings.... and even more extensively used in smaller aircraft.

[nightdriver]

"I thought carbon-fiber composites were already being used in existing large commercial aircraft, specifically in the wings.... and even more extensively used in smaller aircraft."

Yes, carbon fiber has been used for control surfaces on large aircraft and more structural applications on smaller planes.

Bill Lear (of "Lear Jet" fame) discovered that carbon fiber composits tended to catch on fire when electrical current was passed through them. It sorta put the kabosh on carbon fiber for his company.

Now the entire fuselage and wing structure of the 787 is to be made from it. I just hope that they have learned from the experience of others in the industry.