Boeing lithium batteries

eir

issed

the first place? They'll just put an interest free moratorium on the payme nt schedule.

com

com

"Unethical conduct In May 2003, the U.S. Air Force announced it would lease 100 KC-767 tankers to replace the oldest 136 of its KC-135s. In November 2003, responding to critics who argued that the lease was more expensive than an outright purch ase, the DoD announced a revised lease of 20 aircraft and purchase of 80. I n December 2003, the Pentagon announced the project was to be frozen while an investigation of allegations of corruption by one of its former procurem ent staffers, Darleen Druyun (who began employment at Boeing in January) wa s begun. The fallout of this resulted in the resignation of Boeing CEO Phil ip M. Condit and the termination of CFO Michael M. Sears.[35] Harry Stoneci pher, former McDonnell Douglas CEO and Boeing COO, replaced Condit on an in terim basis. Druyun pleaded guilty to inflating the price of the contract t o favor her future employer and to passing information on the competing Air bus A330 MRTT bid. In October 2004, she received a jail sentence for corrup tion.[citation needed]

In March 2005, the Boeing board forced President and CEO Harry Stonecipher to resign. Boeing said an internal investigation revealed a "consensual" re lationship between Stonecipher and a female executive that was "inconsisten t with Boeing's Code of Conduct" and "would impair his ability to lead the company".[36] James A. Bell served as interim CEO (in addition to his norma l duties as Boeing's CFO) until the appointment of Jim McNerney as the new Chairman, President, and CEO on June 30, 2005."

The usual problem is that actual vibration may not meet the test spec. This kind of spec problem happens all the time in new systems.

Yep. Again, something not within the spec may be the cause.

The specs will be updated for sure.

Absolutely. No other policy leads one to the very low accident rate of commercial aviation.

But they are not completely doctrinaire about it. There is a system to collect anonymous near-miss stories, to act as an early warning system.

Yes. Again, such analyses consist of going down all the then known possible causes, and showing that each is prevented or mitigated. The approach will also be updated for sure.

Joe Gwinn

The problem is that it's still too soon for much else.

I don't buy that the problem is because Boeing wanted to cut corners on the tests. Having a public problem like this costs many times more than the entire battery system costs, and the battery system is a trivial fraction of the cost of the airplane.

Something was simply missed while pioneering use of big lithium batteries on aircraft. Somehow, the test setup does not capture something essential about actual operating conditions.

By the way, this battery is not as large as for an electric automobile.

Joe Gwinn

Smaller than a truck battery I'll buy that.

Is the scale in that photo centimetres and inches ?

Don't know, but there was a picture of a burned-out battery box with an engineer inspecting it, so one can get the general scale from that photo. The box didn't seem that large. The size and weight was also published, but I don't recall where I saw it.

Joe Gwinn

I found this photo with an engineer

the one with the scale was like this.

here is a "before" image:

car battery:

so it's over twice the volume of that one

Yebbut JG did say "By the way, this battery is not as large as for an electric automobile." Electric automobile ...

Oops. I missed that. Even electric go-karts have larger batteries.

I guess I wasn't really expecting him to say that, why not compare its size with cell-phone batteries or som other totally dissimilar application?

Thanks Fred.

"The battery can charge from 0 to 90% in only 75 minutes and comes with battery management electronics which guarantees multiple levels of safety features. The rugged prismatic sealed battery design is capable of withstanding extreme operating conditions far greater than those normally seen in commercial aircraft operation and requires absolutely no maintenance."

So much for no maintenance for now I guess.

I am very interested in hearing what they eventually find.

boB

On a sunny day (10 Feb 2013 02:05:16 -0600) it happened boB wrote in :

Captain should not have plugged in his laptop.

Your mother should not have plugged in your father.

The point being that Boeing was not pioneering in the battery size dimension - electric car batteries are far larger. Though they have has some self-immolation events too.

Joe Gwinn

They're not going to find anything. Boeing has been playing with the batter ies for at least the past seven years, Yuasa and Saft for nearly 20 years, and the NTSB is using some Navy clowns for SME (subject matter expertise) w ho cost the government a $500M prototype miniature submarine burned beyond recovery due to Li battery fire that got the whole program canceled. Then o f course everyone knows the FAA is less than useless.

for at least the past seven years, Yuasa and Saft for nearly 20 years, and the NTSB is using some Navy clowns for SME (subject matter expertise) who cost the government a $500M prototype miniature submarine burned beyond recovery due to Li battery fire that got the whole program canceled. Then of course everyone knows the FAA is less than useless.

Interesting. Thanks for the reference.

Best regards, Spehro Pefhany

even with a plane that is stable by itself you are in trouble with out power. They are all fly by wire you need power to move the control surfaces

-Lasse

On a sunny day (Sun, 10 Feb 2013 11:08:25 -0800 (PST)) it happened " snipped-for-privacy@fonz.dk" wrote in :

d u=

ar.

he had power from the propeller driven emergency generator that can fold out when you loose all power

-Lasse

On a sunny day (Sun, 10 Feb 2013 11:31:54 -0800 (PST)) it happened " snipped-for-privacy@fonz.dk" wrote in :

Yes, but that is very little power. No hydraulics to even put the gear down, some instruments witout power, no transponder.

The dreamplane needs active flippering of the controls to be stable, not sure that power would be available to do that. ?