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Search: Posts Made By: Ian W
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Forum: Tech Log
6th Apr 2013, 01:56
Replies: 1,100
Views: 262,891
Posted By Ian W

FlightPathOBN...

FlightPathOBN (http://www.pprune.org/members/351467-flightpathobn)

The test flight is a 'nominal' baseline exercise.

The FAA has egg all over its face from its original certification, they...
Forum: Tech Log
30th Mar 2013, 21:31
Replies: 1,100
Views: 262,891
Posted By Ian W

EEngr I don't quite follow the logic....

EEngr



I don't quite follow the logic. The charge monitoring system should not act as a significant continual drain the battery. All other 'parasitic loads' would surely be met by the...
Forum: Tech Log
22nd Mar 2013, 17:21
Replies: 1,100
Views: 262,891
Posted By Ian W

PickyPerkins See Business jet will have...

PickyPerkins

See Business jet will have sturdier batteries than Boeing 787 | Business & Technology | The Seattle Times...
Forum: Tech Log
20th Mar 2013, 21:13
Replies: 1,100
Views: 262,891
Posted By Ian W

You are correct that fatigue tests do not always...

You are correct that fatigue tests do not always show up what fails in real life but that does not mean that they are not useful to highlight areas of weakness that will show up. It would be a good...
Forum: Tech Log
20th Mar 2013, 11:42
Replies: 1,100
Views: 262,891
Posted By Ian W

Yes they will know they are being watched and yes...

Yes they will know they are being watched and yes they will work -to the rules-. However, that in itself will throw up areas that the writers of the rules did not expect. Where the experts who...
Forum: Tech Log
19th Mar 2013, 13:20
Replies: 1,100
Views: 262,891
Posted By Ian W

CockneySteve Steve - a word in your...

CockneySteve
Steve - a word in your shell-like...

You are conflating the scenarios used in the original testing with the capabilities and limitations of ground testing. The original test...
Forum: Tech Log
18th Mar 2013, 13:28
Replies: 1,100
Views: 262,891
Posted By Ian W

ITman Often it is. In flight tests the...

ITman


Often it is. In flight tests the testing is constrained to nominal (normal) usage of the systems they can be pushed to the edge of normal but cannot be exception tested.
In ground...
Forum: Tech Log
15th Mar 2013, 16:55
Replies: 1,100
Views: 262,891
Posted By Ian W

Lyman I think you may be getting a little...

Lyman
I think you may be getting a little overexcited for the Tech Log thread and even for the R&N thread.

From the briefing:
What is it about demonstrating that fire cannot occur inside the new...
Forum: Tech Log
10th Mar 2013, 17:29
Replies: 1,100
Views: 262,891
Posted By Ian W

Lyman I think this may be the initial...

Lyman


I think this may be the initial development management error. Did anyone ever test this Securaplane patented technology with a failed cell? Or was the assumption made that with this...
Forum: Tech Log
8th Mar 2013, 14:35
Replies: 1,100
Views: 262,891
Posted By Ian W

Chris Scott BOS Jan 7: Min temp 29F Max...

Chris Scott


BOS Jan 7: Min temp 29F Max temp 39F Mean 34F - at 10:10 I would expect it to be around 32F at a guess. So nothing particularly cold.
Forum: Tech Log
26th Feb 2013, 13:38
Replies: 1,100
Views: 262,891
Posted By Ian W

Cockney Steve This was my feeling as well...

Cockney Steve


This was my feeling as well - perhaps not deliberate abuse but slavishly following the laid down procedures which perhaps have some instructions that 'assume' that...
Forum: Tech Log
24th Feb 2013, 16:16
Replies: 1,100
Views: 262,891
Posted By Ian W

Syseng68k Back at the beginning of the thread...

Syseng68k
Back at the beginning of the thread there was detail about the BMS using a patented system that managed the charging of the cells using software that predicted the temperatures from the...
Forum: Tech Log
14th Feb 2013, 14:21
Replies: 1,100
Views: 262,891
Posted By Ian W

True, but perhaps it was not considered that...

True, but perhaps it was not considered that someone would wait until that auto-disconnect or the level just before it - every single turnaround -

It might be instructive to look at the fleet of...
Forum: Tech Log
14th Feb 2013, 13:40
Replies: 1,100
Views: 262,891
Posted By Ian W

@inetdog Perhaps if an airline followed the...

@inetdog
Perhaps if an airline followed the rules/procedures for battery handling 'to the letter' repeated discharging to a lower SOC was inevitable? (In some areas this method of working is...
Forum: Tech Log
9th Feb 2013, 17:44
Replies: 1,100
Views: 262,891
Posted By Ian W

GreenGranite, The connectors all seem to have...

GreenGranite,
The connectors all seem to have crosshead screw atttachments. Whether there is a 'spade' or circular connecting lug cannot be seen.


On a more general point right at the...
Forum: Tech Log
1st Feb 2013, 01:36
Replies: 1,100
Views: 262,891
Posted By Ian W

RR_NDB That was the quote in the WSJ...

RR_NDB


That was the quote in the WSJ story. I presume that there must be a procedure for disconnecting the battery that was not followed. It may be an area to be investigated.
Forum: Tech Log
31st Jan 2013, 23:26
Replies: 1,100
Views: 262,891
Posted By Ian W

RR_NDB If someone wants to disconnect a...

RR_NDB


If someone wants to disconnect a battery incorrectly then it will still cause problems the quote actually goes on to say



I was just pointing out that the large number of battery...
Forum: Tech Log
31st Jan 2013, 22:45
Replies: 1,100
Views: 262,891
Posted By Ian W

From WSJ Dreamliner Batteries Needed Replacement...

From WSJ Dreamliner Batteries Needed Replacement Before Incident - WSJ.com (http://online.wsj.com/article/SB10001424127887323701904578273283088672060.html)



Sounds like a fair amount of...
Forum: Tech Log
29th Jan 2013, 18:42
Replies: 1,100
Views: 262,891
Posted By Ian W

Re...

Re http://www.pprune.org/tech-log/505695-787-batteries-chargers-13.html#post7662369

Just a simple question. How cold does it get in those battery bays? The diagram you show indicates that the...
Showing results 1 to 19 of 19


 
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