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Search: Posts Made By: Lyman
Showing results 1 to 35 of 134
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Forum: Tech Log
16th Mar 2013, 22:06
Replies: 1,100
Views: 262,670
Posted By Lyman

The only closeup photo I saw of the forward...

The only closeup photo I saw of the forward scupper showed the aperture completely covered over with film, and tape.
Forum: Tech Log
15th Mar 2013, 17:16
Replies: 1,100
Views: 262,670
Posted By Lyman

I think you have not understood the nature of the...

I think you have not understood the nature of the chemistry involved.

"Inerting" the enclosure, by eliminating Oxygen, accomplishes nothing. This battery will spontaneously ignite without the...
Forum: Tech Log
15th Mar 2013, 16:08
Replies: 1,100
Views: 262,670
Posted By Lyman

FP I was thinking more along the lines of...

FP

I was thinking more along the lines of Nixon. Because Clinton's ploy worked, but Nixon had to resign.

Sinnett (Boeing):



Confucius (Free lancer):
Forum: Tech Log
15th Mar 2013, 15:02
Replies: 1,100
Views: 262,670
Posted By Lyman

From Boeing... Told ya' it was just a...

From Boeing...



Told ya' it was just a question of scale (quantity), not type (quality)....:ugh:

The problem is one of 'perception', and Boeing takes a more forgiving position; as the chief...
Forum: Tech Log
14th Mar 2013, 23:40
Replies: 1,100
Views: 262,670
Posted By Lyman

Yes, the box is not allowed for the intended...

Yes, the box is not allowed for the intended purpose, containment. FIRE is prohibited. So the box is moot, and has got to be a distraction only. The box can be used for containment of gases, and...
Forum: Tech Log
14th Mar 2013, 01:05
Replies: 1,100
Views: 262,670
Posted By Lyman

FP As above in my post #965, the condition...

FP

As above in my post #965, the condition number six, as written, prohibits this Battery installation as designed.

Any short circuit will take the battery off line, as will any temperature...
Forum: Tech Log
13th Mar 2013, 15:52
Replies: 1,100
Views: 262,670
Posted By Lyman

I believe it was BOEING that stated the...

I believe it was BOEING that stated the possibility for fire was only related to overcharging, and they optimistically pegged that at 1/billion.

If I delete all reference to statistics and...
Forum: Tech Log
13th Mar 2013, 15:25
Replies: 1,100
Views: 262,670
Posted By Lyman

I should have used quotes, I have no knowledge of...

I should have used quotes, I have no knowledge of the statistics of these failures.

The quote is from John Goglia, outspoken critic of Boeing's actions, and a former Member of NTSB...

my...
Forum: Tech Log
13th Mar 2013, 14:39
Replies: 1,100
Views: 262,670
Posted By Lyman

BOX 2.0

Here is the condition that requires the presence of the upgraded BOX.



This is why I have made such an issue of the nomenclature, "Cell" v. "Battery".

As written, the language prevents...
Forum: Tech Log
12th Mar 2013, 23:51
Replies: 1,100
Views: 262,670
Posted By Lyman

Kiskaloo It occurred to me a while ago that...

Kiskaloo

It occurred to me a while ago that perhaps too much was being asked of the APU/MAIN Batt system, as designed. It turns out there is a similar system one rack above the main problem. So it...
Forum: Tech Log
12th Mar 2013, 22:08
Replies: 1,100
Views: 262,670
Posted By Lyman

Does the ACE perform other, occasional duty? How...

Does the ACE perform other, occasional duty? How many discharge/charge cycles per flght? Is it enclosed, with a tamper proof seal? Is it not a true "Backup" storage battery, where the APU/MAIN...
Forum: Tech Log
12th Mar 2013, 07:28
Replies: 1,100
Views: 262,670
Posted By Lyman

TURIN The ACE is single purpose, a...

TURIN



The ACE is single purpose, a true 'Backup', not integrated into the distribution system for general purpose.

If only the APU/MAIN had similar function....

This 'large format'...
Forum: Tech Log
11th Mar 2013, 19:28
Replies: 1,100
Views: 262,670
Posted By Lyman

TURIN Is there precedent for a single...

TURIN



Is there precedent for a single battery in service aboard an aircraft?

In "Large Format"?

All of Boeings propositions have to do with protecting seven cells from just one.
Forum: Tech Log
11th Mar 2013, 18:07
Replies: 1,100
Views: 262,670
Posted By Lyman

Most of my experience with heat damage has to do...

Most of my experience with heat damage has to do with monolitic structure, depending on the purity of the mix, failure is propagated with variable absorption/loss of heat. Fractures are frequently...
Forum: Tech Log
11th Mar 2013, 17:28
Replies: 1,100
Views: 262,670
Posted By Lyman

I have a fair amount of experience in laminates....

I have a fair amount of experience in laminates. If I had to be restricted to one facet of this failure, I would look at the performance (in service) of the roll.

Expansion and contraction, (with...
Forum: Tech Log
11th Mar 2013, 16:50
Replies: 1,100
Views: 262,670
Posted By Lyman

The LaminateLiner

inetdog



I think it would be instructive to look at the construction of each cell. Two metallic foil layers, two "paste" layers, and one "Separator", of polypropylene/polyethylene... Laid up...
Forum: Tech Log
11th Mar 2013, 15:32
Replies: 1,100
Views: 262,670
Posted By Lyman

Howdy, thanks for responding. Let me re-post...

Howdy, thanks for responding.

Let me re-post what I think is important, and not at all argumentative (?)

Whatever the nomenclature, there are three wound cells in each of eight cases.

Any...
Forum: Tech Log
11th Mar 2013, 14:02
Replies: 1,100
Views: 262,670
Posted By Lyman

fish Page 19

From FPRA, the ExPonent report to Fire Research....

Out of my depth... But is this a precursor to the program of replacements? What would be the metric that alerts to the need to get the battery...
Forum: Tech Log
11th Mar 2013, 13:32
Replies: 1,100
Views: 262,670
Posted By Lyman

There are three cells in each of eight batteries....

There are three cells in each of eight batteries.

Y'all are talking like each cell in each battery is not susceptible to this same imbalance failure, no? Each of the three cells is a unit made of...
Forum: Tech Log
10th Mar 2013, 22:30
Replies: 1,100
Views: 262,670
Posted By Lyman

Thank you saptzae, for your patience with a...

Thank you saptzae, for your patience with a layman.

I still am not tracking as to how a primary cause, an internal short, can be "managed".....

I was confusing management with "mitigation", so...
Forum: Tech Log
10th Mar 2013, 20:00
Replies: 1,100
Views: 262,670
Posted By Lyman

A Nail is better than....What? A nail is...

A Nail is better than....What?

A nail is not representative of a typical FAIL. Overuse, over demand, age, Pressure/Temp cycling, vibration, etc.

A Nail is a parlor joke, right? A sledgehammer...
Forum: Tech Log
10th Mar 2013, 19:30
Replies: 1,100
Views: 262,670
Posted By Lyman

saptzae, Inadequate management at the...

saptzae,



Inadequate management at the internal short stratum? Primary? It must be prevented, not managed, to wit:

Management at the secondary level, post internal short, is not management,...
Forum: Tech Log
10th Mar 2013, 17:43
Replies: 1,100
Views: 262,670
Posted By Lyman

Prior to filing document of disclosure for a...

Prior to filing document of disclosure for a patent in the early seventies, I would not have guessed that a Patent hasn't anything whatever to do with the utility of the patented process/device.
...
Forum: Tech Log
10th Mar 2013, 17:09
Replies: 1,100
Views: 262,670
Posted By Lyman

FPOBN, The Special Regulations were composed...

FPOBN,

The Special Regulations were composed in 2007, and approved the same year (October).

The Fire Research report, in addressing the "large format" Li technology, stated unequivocally that...
Forum: Tech Log
10th Mar 2013, 15:02
Replies: 1,100
Views: 262,670
Posted By Lyman

Howdy HighWind... So too, is each...

Howdy HighWind...



So too, is each individual battery, ('cell').

I think... (Aluminum) Ground Failure issues?

:ok:
Forum: Tech Log
10th Mar 2013, 13:19
Replies: 1,100
Views: 262,670
Posted By Lyman

Howdy saptzae, As to Monitor.......

Howdy saptzae,



As to Monitor.... Secureaplane has their patent, a method of sensing and thereby controlling charging? For each cell? That did not happen... Patents protect frrom imitation,...
Forum: Tech Log
10th Mar 2013, 10:59
Replies: 1,100
Views: 262,670
Posted By Lyman

@saptzae post #500 A Battery that...

@saptzae post #500



A Battery that cannot be charged cannot be relied upon to perform. The purpose of the Batteries: to provide a storage of dependable power to satsify regulations.

NTSB...
Forum: Tech Log
9th Mar 2013, 12:39
Replies: 1,100
Views: 262,670
Posted By Lyman

If the Battery is integrated into the...

If the Battery is integrated into the distribution network, it is not a Back Up Battery. It is a Battery that has an additional function in name only. By definition, this functional demand is outside...
Forum: Tech Log
9th Mar 2013, 00:09
Replies: 1,100
Views: 262,670
Posted By Lyman

At a guess, 98 per cent of the discussion here is...

At a guess, 98 per cent of the discussion here is 100% forensic debrief.

Were I Boeing, that is where I would like the discussion to be.

Likewise Yuasa.

The manufacture of the Yuasa...
Forum: Tech Log
8th Mar 2013, 21:52
Replies: 1,100
Views: 262,670
Posted By Lyman

TURIN Forensically, an exemplar represents...

TURIN

Forensically, an exemplar represents baseline, undisturbed, unperturbed. It is not best practice to use a specimen involved in the accident in any way, it could color the results of any and...
Forum: Tech Log
8th Mar 2013, 21:35
Replies: 1,100
Views: 262,670
Posted By Lyman

Hi kiskaloo... from the article you cite... ...

Hi kiskaloo...

from the article you cite...



my bold...

That would not be for recharging right? In other parts of the article
Forum: Tech Log
8th Mar 2013, 20:26
Replies: 1,100
Views: 262,670
Posted By Lyman

kiskaloo... Can you cite a source? ...

kiskaloo...



Can you cite a source?

Also, once discharged, these batteries cannot be "recharged" according to Boeing...and Yuasa. There is no "return to service". My belief is that once...
Forum: Tech Log
8th Mar 2013, 20:20
Replies: 1,100
Views: 262,670
Posted By Lyman

The proposal by Boeing was that only overcharging...

The proposal by Boeing was that only overcharging would cause a fire....

Fire is required to be 10^-9 as a safety critical factor.

So I would not want my batteries charging during flight, that...
Forum: Tech Log
8th Mar 2013, 18:29
Replies: 1,100
Views: 262,670
Posted By Lyman

inetdog So if in an emergency, the APU...

inetdog



So if in an emergency, the APU is powering the aircraft, and the APU BATT decides to short circuit, it takes the APU along with?

What?

Also...
Forum: Tech Log
8th Mar 2013, 18:17
Replies: 1,100
Views: 262,670
Posted By Lyman

Hi RR.. If one stops to consider the method...

Hi RR..

If one stops to consider the method of construction of the Batteries, then reviews the Failure Analysis Associates link, for spontaneous failures, there are some possibilities remaining to...
Showing results 1 to 35 of 134
 
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