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Bad battery design responsible for Boeing Dreamliner grounding, expert says
Fox News ^
| 1/18/13
| Jeremy A. Kaplan
Posted on 01/18/2013 12:56:33 PM PST by Ron C.
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To: Ol' Dan Tucker
Thanks much - interesting stuff! Now I wonder if they’ll ever find out what caused it. (Over or under charged?)
41
posted on
01/18/2013 4:48:40 PM PST
by
Ron C.
To: ltc8k6
So in short this was a starter battery (and a backup breaking battery) - if I read correctly. Sounds like the load for starting is greater than the battery is designed for - if after starting the engines, it has to come into play too soon afterward for breaking. Too much demand for too small a battery perhaps?
42
posted on
01/18/2013 4:58:58 PM PST
by
Ron C.
To: Ron C.
Thanks much - interesting stuff! Now I wonder if theyll ever find out what caused it. (Over or under charged?)You're welcome.
43
posted on
01/18/2013 5:02:46 PM PST
by
Ol' Dan Tucker
(People should not be afraid of the government. Government should be afraid of the people)
To: Ron C.
Some good comments in this thread. I enjoy ‘technical discussions’ and learn something every time I do. Ping for more reading later...
44
posted on
01/18/2013 5:09:48 PM PST
by
SueRae
(It isn't over. In God We Trust.)
To: Ol' Dan Tucker
“They definitely won’t last the life of the airplane, which is 20-30 years.”
Not if the Lithium battery catches on fire, which was the unspoken punchline.
To: Ol' Dan Tucker
They definitely won't last the life of the airplane, which is 20-30 years. I think that the point here is that the 787 lifespan is going to be measured in weeks. Hence, these batteries are certainly going to last for the life of the aircraft.
46
posted on
01/18/2013 8:45:49 PM PST
by
tpmintx
(Gun free zones are hunting preserves for unarmed people.)
To: Ron C.
It’s normally not used unless other power sources are not available.
It would be a bit unusual to start the APU or the main engines with the batteries.
It was probably last done when they were testing the planes.
47
posted on
01/19/2013 5:11:03 AM PST
by
ltc8k6
To: pabianice
I worked on the Boeing 787, software side. The amount of paperwork we had to do was cumbersome to the point of being comical. We had to account for EVERYTHING in testing and certification work ant it amounted to 10x the amount of time it took to actually write the software. Boeing is right, a change like a battery will require months of retesting.
Boeing and the passengers are blessed the incidents weren't more serious.
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