Its braking, pressurization, and air-conditioning systems are run not by hy- draulics but by electricity from lithium-ion batteries.
Originally Posted by
DG1000
Another reporter who thinks he knows what he is talking about?
Are the systems run off the batteries normally? No. Are they electrically powered? Yes.
Pressurization pumps, AC packs, and wheel brakes are all electrically powered on the 787. The normal and alternate wheel brakes are 28Vdc-powered. Without getting into the systems, I'm not sure how the load shedding would work, but, in a loss of all engines (loss of all electrical generators), I'm guessing the RAT might pick up the pressurization and packs, but the alternate brakes are gonna' be off the batteries, since you'll need them after the RAT spins down on the ground.
The rest of the article is right on. Boeing really screwed up by outsourcing so much of the work, trying to cut costs.
Let's hope the eventual 737 replacement is designed and built in-house.