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Search: Posts Made By: inetdog
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16th Jan 2014, 01:50
Replies: 2,186
Views: 905,527
Posted By inetdog

Island Airphoto said The differences are...

Island Airphoto said

The differences are pretty simple.
Lead Acid and NiCd cells (even sealed ones) can tolerate a certain amount of overcharge without damage, as long as the rate and...
Forum: Tech Log
16th Jan 2014, 01:33
Replies: 72
Views: 18,404
Posted By inetdog

airman1900: Your post had the correct text form...

airman1900: Your post had the correct text form of the link, but the URL behind the text pointed to the previously posted article.
For those who are less agile with their browsers, here is the...
11th Jul 2013, 23:14
Replies: 2,186
Views: 905,527
Posted By inetdog

Momoe: So DH built a single test tank and...

Momoe:

So DH built a single test tank and waited a long time. Boeing has installed a test tank in each plane in the fleet. Sounds more efficient, right? :rolleyes:
1st Jun 2013, 06:06
Replies: 2,186
Views: 905,527
Posted By inetdog

Skyblade: Perhaps well written overall, but...

Skyblade:

Perhaps well written overall, but their mention that the forward battery is used to start the main engines seems ludicrous to me based on what I have read here and elsewhere.
The...
10th May 2013, 01:31
Replies: 2,186
Views: 905,527
Posted By inetdog

I have been waiting for this (more CT scans) to...

I have been waiting for this (more CT scans) to surface!
A short sentence somewhat buried in the report on the CT scan of the failed battery from Boston mentioned a recommendation to do extensive...
Forum: Tech Log
1st May 2013, 09:16
Replies: 72
Views: 18,404
Posted By inetdog

kenneth house: The information I have...

kenneth house:


The information I have seen indicates that for reliability the vent is simply a rupture disk.
If we assume that it has to be able to tolerate more than the pressure differential...
Forum: Tech Log
26th Apr 2013, 16:49
Replies: 72
Views: 18,404
Posted By inetdog

More documents released....

The online NTSB document access system (http://dms.ntsb.gov/pubdms/search/document.cfm?docID=390299&docketID=54251&mkey=85973) just had 36 new documents added to it, most relating to new...
22nd Apr 2013, 16:20
Replies: 2,186
Views: 905,527
Posted By inetdog

poorjohn: It would indeed, but because of...

poorjohn:

It would indeed, but because of the way the battery, the contained BMU and the charger interact, any replacement would probably have to involve all three.
Given the added size and...
19th Apr 2013, 23:02
Replies: 2,186
Views: 905,527
Posted By inetdog

cockney steve: The fasteners on the blue...

cockney steve:


The fasteners on the blue box have not changed much if at all. But the fire box which now contains the blue box has something like 30 or more screws all around the mounting flange...
17th Apr 2013, 20:51
Replies: 2,186
Views: 905,527
Posted By inetdog

Is this for the new, improved battery? If so can...

Is this for the new, improved battery? If so can you provide a link to the description you are working from? I have been unable to find anything more recent than the original Boeing graphics of the...
Forum: Tech Log
14th Apr 2013, 23:51
Replies: 72
Views: 18,404
Posted By inetdog

Just to get the continuation rolling, so people realize it is open....

Welcome to Part II.


Machaca:

But that will be without the totally hilarious captioning/transcription errors you got from the "live" feed.


Actually "For both Lithium-ion and metal...
12th Apr 2013, 23:49
Replies: 2,186
Views: 905,527
Posted By inetdog

Old Engineer: 2. My understanding it that...

Old Engineer:


2. My understanding it that even though the two S/Gs are identical, only one of them is wired to be used for starting via the APU battery. It is not selectable. So you have two...
12th Apr 2013, 06:10
Replies: 2,186
Views: 905,527
Posted By inetdog

Kiskaloo, does this temporary loss of...

Kiskaloo, does this temporary loss of certification (or at least loss of confidence) restart the clock, or has the time been put in and only approval is needed?
Forum: Tech Log
12th Apr 2013, 00:19
Replies: 1,100
Views: 178,319
Posted By inetdog

FlightPathOBN: Even though the live feed is...

FlightPathOBN:
Even though the live feed is over, the caption window at that link will allow you to copy and paste the entire 713 line auto-caption content, beginning to end. Not nearly as friendly...
26th Mar 2013, 23:55
Replies: 2,186
Views: 905,527
Posted By inetdog

peter we: Comments have been made about this,...

peter we:
Comments have been made about this, and the only information I have seen is that there is undervoltage protection in the BMU at the cell level which will disconnect the battery and/or...
26th Mar 2013, 19:49
Replies: 2,186
Views: 905,527
Posted By inetdog

fgrieu: Lithium Battery Failures...

fgrieu:

Lithium Battery Failures (http://www.mpoweruk.com/lithium_failures.htm) gives a good overview.

http://www-scf.usc.edu/~rzhao/LFP_study.pdf gives a deeper look at the normal chemistry of...
25th Mar 2013, 23:25
Replies: 2,186
Views: 905,527
Posted By inetdog

Pub User: Right! Professionals should...

Pub User:

Right! Professionals should confine themselves to reporting and discussing Rumors (& News), not starting them.
Now if you find a sensational tabloid rumor on the subject, I suppose you...
Forum: Tech Log
23rd Mar 2013, 05:24
Replies: 1,100
Views: 178,319
Posted By inetdog

Machingbird (I like that one): Have not seen...

Machingbird (I like that one):

Have not seen discussion, other than the argument the the "cell" should be treated and protected as if it were three cells in parallel, or physically or virtually...
23rd Mar 2013, 02:37
Replies: 2,186
Views: 905,527
Posted By inetdog

Cool Guys: A lot of people do take the...

Cool Guys:


A lot of people do take the easy way out and say that if the chance of one engine failing it 1 in a million then the chance of two engines failing is 1 in a trillion. That does not...
Forum: Tech Log
23rd Mar 2013, 02:30
Replies: 1,100
Views: 178,319
Posted By inetdog

PickyPerkins: I believe that they tried an...

PickyPerkins:

I believe that they tried an external short circuit of one cell, and I know they tried an internal short circuit (nail) of one cell.
I think that in both cases the cells were not...
22nd Mar 2013, 08:48
Replies: 2,186
Views: 905,527
Posted By inetdog

Ruffled Feathers!

http://dms.ntsb.gov/pubdms/search/document.cfm?docID=389173&docketID=54251&mkey=85973 :



PS: See http://www.ntsb.gov/doclib/forms/NTSB_Investigation_Party_Form.pdf for information on the...
19th Mar 2013, 19:00
Replies: 2,186
Views: 905,527
Posted By inetdog

slf4life: Actually, they really meant a fire...

slf4life:

Actually, they really meant a fire inside the FIRE BOX.
What they are saying is that regardless of to what extent and how violently the battery melts down, and how volatile the liquid...
19th Mar 2013, 01:45
Replies: 2,186
Views: 905,527
Posted By inetdog

Cool Guys: Step 1. Hit the "Quote button"...

Cool Guys:

Step 1. Hit the "Quote button" (words inside a balloon icon) from the format bar in the reply screen.
Step 2. Paste in the words you want to quote.
Rinse and repeat as needed.
...
Forum: Tech Log
19th Mar 2013, 01:39
Replies: 1,100
Views: 178,319
Posted By inetdog

EEngr: I have not seen it in writing, but...

EEngr:

I have not seen it in writing, but the discussion in the Webex seemed to imply that for a plane which is landing the brakes can be powered from the RAT or some other short duration battery,...
18th Mar 2013, 18:41
Replies: 2,186
Views: 905,527
Posted By inetdog

mostlylurking: The webcast mentioned a...

mostlylurking:

The webcast mentioned a rupture disk. Very old technology which is far more likely to open before needed than to fail closed. There will also be a sensor to alarm when the disk...
Showing results 1 to 25 of 71
 


 
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