Boeing Dreamliner - turned into a nightmare?

[TheAnimus]

I thought the RAT was the "windmiling turbine electrical generation"? Or do you mean the power generation from the Engines? In which case I'd have thought they would likely go through the battery. It's not normally good to connect something sensitive to any kind of small generator without a bit of smoothing, the light aircraft I fly, if suffered a battery failure like this, would loose all avionics. Then again, thats normally not an issue for mem as even if I forget my landing at controlled whilst radio-less emergency procedures, they are on my knee board, the joys of being a VFR!

A lot of GA targeted glass cockpit gear has its own battery backup systems, I'd be amazed if boeing have gone entirely one battery, surely enough Comm, GPS and ILS kit would have it's own emergency power.

[HalloweenJack]

usually in the event of an engine failure , as long as the fan can keep turning from the windmiling effect then you can keep electrical generation - for the last ditch ` ram air turbine` to depoy then a plethora of systems had already failed, incluiding that batteris and the battery back up!

[Gerrard]

I would imagine the RAT would deploy regardless of battery status. If you've lost all engine driven generation, then it seems sensible to deploy it then rather than relying purely on batteries at that point.

[HalloweenJack]

the RAT drives the central hydraulics - but whats very interesting ; the incident to cause the RAT to deploy in 2010 , was as a result of a fire in the rear electrical bay!

so why did they drop the RAT and not cart start the apu? or is there no crt star ability and its battery start (useless without batteries!)

[Butuz]

The worrying thing is that the Lithium Ion batteries used are far less succeptible to overcharging abuse than Lithium polymer batteries often used elsewhere. This means the batteries must have been SERIOUSLY overcharged on a regular basis - something which should have never got through testing?

Butuz

[CAT-THE-FIFTH]

They need a CAT.

[HalloweenJack]

http://www.pprune.org/rumours-news/5...ml#post7647302


ton of **** has just landed on boeing from a very very great height - as the author of that post has said:

Without changing the entire engineering approach to the rules, relative to standby power, the 787, without compliance, effectively has no type certificate.

[peterb]

"Sleepless in Seattle" takes on a new meaning.