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Old Jan 18, 2013, 02:15 PM
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So, am I hearing this right: some among you believe the design flaw was introduced by one or more female engineers at Boeing who failed to take into account....?

Let's see if I can remember the formula: the angle of the....
Old Jan 18, 2013, 02:18 PM
FL Knifemaker is offline
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I think Boeing put too much faith in a technology that wasn't quite ready
Old Jan 18, 2013, 02:19 PM
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You may be right.

If Boeing is lucky, it is a fabrication defect; if unlucky, well, it is the design.
Old Jan 18, 2013, 03:55 PM
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still think it was just a bad batch
the batteries where supplied by a 3rd party contractor that had a good tack record
this isnt Boeings fault as much as the contractors
Old Jan 18, 2013, 04:10 PM
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"Bad batch" means a fabrication defeat-hope you are right.
Old Jan 18, 2013, 04:34 PM
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Quote:
Originally Posted by FL Knifemaker View Post
I have a swelling from overheating problem as well!!
I thought that was an overeating problem.
Old Jan 18, 2013, 04:45 PM
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Batteries by Yuasa and charging circuitry by Thales as I understand it.
Media reports seem to be pointing to the batteries being subject to too high voltage, I would take that to mean too high a charge voltage. The first incident was with the battery for starting the APU. Was the APU running at that time on the ground??
With the other incident in flight, I would think that the only thing happening is that they were being charged, since there should be no draw on either of the batteries in normal flight. I hope they get to the bottom of this quickly. Funny, that with all the hours of flight testing and over a year in revenue service, all of a sudden two batteries fail back to back.
Other than this issue, the 787 teething pains seem to have been quite normal.
Pete
Old Jan 18, 2013, 05:00 PM
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Originally Posted by pilotpete2 View Post
Batteries by Yuasa and charging circuitry by Thales as I understand it.
Media reports seem to be pointing to the batteries being subject to too high voltage, I would take that to mean too high a charge voltage. The first incident was with the battery for starting the APU. Was the APU running at that time on the ground??
With the other incident in flight, I would think that the only thing happening is that they were being charged, since there should be no draw on either of the batteries in normal flight. I hope they get to the bottom of this quickly. Funny, that with all the hours of flight testing and over a year in revenue service, all of a sudden two batteries fail back to back.
Other than this issue, the 787 teething pains seem to have been quite normal.
Pete
i would not want to be the Boeing guy at Yuasa or Thales right now lol
Old Jan 18, 2013, 07:02 PM
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You bet Yuasa, you don't want to be the guy at Yuasa
Pete
Old Jan 18, 2013, 07:47 PM
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Boing....
Old Jan 18, 2013, 08:27 PM
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I believe it was Thales pitot tubes that were incriminated it the AF 447 crash a few years back.
Dave
Old Jan 18, 2013, 08:43 PM
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I believe it was Thales pitot tubes that were incriminated it the AF 447 crash a few years back.
Dave
that was only 1/2 the story
the other half was the pilots fixating on one instrument
there was a lot of pilot error in that too
Old Jan 18, 2013, 08:55 PM
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Funny, that with all the hours of flight testing and over a year in revenue service, all of a sudden two batteries fail back to back.
No surprises there. It's pretty typical for these companies to use less-than-challenging test environments. Then the 'real' users pummel the crap out of the product and suddenly some 'unforeseen problems' crop up.
Old Jan 18, 2013, 11:26 PM
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Latest blog entry: RC Logger's Eye One Xtreme Quad
Old Jan 18, 2013, 11:28 PM
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29 rods from you in western WI
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Where's Mark Wood? We need a buncha real big lipo l-ion sacks.


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