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Search: Posts Made By: hetfield
Showing results 1 to 35 of 1000
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Forum: Rumours & News
7th Feb 2013, 13:33
Replies: 2,185
Views: 1,034,988
Posted By hetfield

http://www.mlit.go.jp/jtsb/flash/JA804A_130116-130...

http://www.mlit.go.jp/jtsb/flash/JA804A_130116-130205.pdf

Page 5?
Forum: Rumours & News
7th Feb 2013, 10:06
Replies: 2,185
Views: 1,034,988
Posted By hetfield

@cockney steve Yes, the eight "cells" of the...

@cockney steve

Yes, the eight "cells" of the 787 battery contain each 6 sub-cells in parallel.
Paralleling increases capacity. So each sub-cell has about 11Ah makes roughly the nominated 65Ah....
Forum: Tech Log
6th Feb 2013, 18:33
Replies: 14
Views: 3,013
Posted By hetfield

@Bula YOUR ARE THE PILOT! There are...

@Bula

YOUR ARE THE PILOT!

There are several knobs on 321 to make it work like YOU want!
Forum: Tech Log
6th Feb 2013, 13:59
Replies: 1,100
Views: 263,332
Posted By hetfield

755 must be a typo...

755 must be a typo...
Forum: Rumours & News
6th Feb 2013, 13:17
Replies: 2,185
Views: 1,034,988
Posted By hetfield

@mikkojuha At least, I don't know Li-Ion...

@mikkojuha

At least, I don't know Li-Ion cells (one cell) which has 65Ah....
Forum: Rumours & News
6th Feb 2013, 09:12
Replies: 2,185
Views: 1,034,988
Posted By hetfield

Yep, some pilots are also engineers with a...

Yep, some pilots are also engineers with a university degree......;)
Forum: Tech Log
6th Feb 2013, 08:40
Replies: 1,100
Views: 263,332
Posted By hetfield

@vince Welcome:) I really appreciate...

@vince

Welcome:)

I really appreciate your support.

About overcharging a single cell (1/48 cells), I'm with saptzae, it's voltage limited.

About a bad single cell (short) I'm fully with...
Forum: Rumours & News
6th Feb 2013, 07:23
Replies: 2,185
Views: 1,034,988
Posted By hetfield

Yes, lead acid can do it, Li-Ion not. In the...

Yes, lead acid can do it, Li-Ion not.

In the 787 batteries each cell-array (8) has 6 cells in parallel.
So, one cell has litlle over 10Ah.
Forum: Tech Log
5th Feb 2013, 20:00
Replies: 1,100
Views: 263,332
Posted By hetfield

Boeing 787 batteries: What's causing their...

Boeing 787 batteries: What's causing their 'thermal runaways?' - CSMonitor.com...
Forum: Rumours & News
5th Feb 2013, 17:30
Replies: 82
Views: 51,322
Posted By hetfield

@Lurking SLF Do you mind to publish the...

@Lurking SLF

Do you mind to publish the dates of mentioned accidents?
Forum: Tech Log
5th Feb 2013, 17:27
Replies: 1,100
Views: 263,332
Posted By hetfield

Accident: ANA B788 near Takamatsu on Jan 16th...

Accident: ANA B788 near Takamatsu on Jan 16th 2013, battery problem and burning smell on board (http://avherald.com/h?article=45c377c5&opt=0)
...
Forum: Tech Log
5th Feb 2013, 12:28
Replies: 1,100
Views: 263,332
Posted By hetfield

Well, to my knowledge Li-Ion batteries aren't...

Well, to my knowledge Li-Ion batteries aren't that old...

Yes, but how can a charger/BMS look after the sub-cells?

They have their own social life. The rich feed the poor until dead.
Forum: Tech Log
5th Feb 2013, 11:01
Replies: 1,100
Views: 263,332
Posted By hetfield

I'm still concerned with the 6 sub-cells of each...

I'm still concerned with the 6 sub-cells of each of the eight cells.

They are never equal/matched perfectly. Current oscillations may occur, but even a totally unmonitored thermal runaway...
...
Forum: Rumours & News
5th Feb 2013, 09:13
Replies: 82
Views: 51,322
Posted By hetfield

Interesting, in my outfit (major EU carrier) we...

Interesting, in my outfit (major EU carrier) we don't have it.

BTW, who was PF?
Forum: Tech Log
4th Feb 2013, 20:01
Replies: 1,100
Views: 263,332
Posted By hetfield

Which cells? 1/8 or 1/48?

Which cells? 1/8 or 1/48?
Forum: Tech Log
4th Feb 2013, 16:58
Replies: 71
Views: 18,909
Posted By hetfield

What is a "Flight Director"? For me, the PF...

What is a "Flight Director"?

For me, the PF is.

If he/she can't cope with the desired flight path, it's me....
at the very end of the chain, the commander.
Forum: Rumours & News
4th Feb 2013, 11:25
Replies: 2,185
Views: 1,034,988
Posted By hetfield

@fizz57 It's not that simple, just NOT the...

@fizz57

It's not that simple, just NOT the battery. And this kind of battery isn't also simple at all.

To my knowledge, there are 4 companies involved for 787 batteries :

- GS YUASA (J),...
Forum: Tech Log
3rd Feb 2013, 21:51
Replies: 1,100
Views: 263,332
Posted By hetfield

@mm43 Thx, I know.... True, but...

@mm43

Thx, I know....



True, but irrelevant, negligible?

Don't think so.
Forum: Tech Log
3rd Feb 2013, 21:36
Replies: 1,100
Views: 263,332
Posted By hetfield

No! Eight packs a 65Ah, each consistent of 6...

No!

Eight packs a 65Ah, each consistent of 6 parallel connected cells.

To make clear, one single cell can't hold 65 Ah!
Forum: Tech Log
3rd Feb 2013, 20:48
Replies: 1,100
Views: 263,332
Posted By hetfield

@SoS So, no balancing of each of the 48...

@SoS

So, no balancing of each of the 48 cells, right?
Forum: Tech Log
3rd Feb 2013, 20:21
Replies: 1,100
Views: 263,332
Posted By hetfield

To put it simple... There are 48 cells in a...

To put it simple...

There are 48 cells in a 787 battery, right?

Eight "master cells" are balanced/monitored, right?

The sub cells are NOT BALANCED / NOT MONITORED, right?
Forum: Rumours & News
3rd Feb 2013, 20:05
Replies: 82
Views: 51,322
Posted By hetfield

@Welle That's Italy. Do you know...

@Welle

That's Italy.

Do you know Francesco Schettino, Captain of stranded Concordia, is challenging his companie's decision to fire him?

Do you know Berlusconi, a multi sentenced criminal,...
Forum: Rumours & News
3rd Feb 2013, 19:51
Replies: 82
Views: 51,322
Posted By hetfield

@HT I'm afraid, you still didn't get it! ...

@HT

I'm afraid, you still didn't get it!

With increasingly number of flights, chances raise for an accident/incident.

All major carriers like AF/LH/BA, you name it, are facing it!

It's a...
Forum: Rumours & News
3rd Feb 2013, 19:34
Replies: 82
Views: 51,322
Posted By hetfield

@HT With your logic, any 3rd world bush...

@HT

With your logic, any 3rd world bush hopper is comparable to AF.

Gimmie a break!

Look how many pax/takeoffs per day are done with AF!

BTW
Forum: Tech Log
3rd Feb 2013, 19:30
Replies: 1,100
Views: 263,332
Posted By hetfield

Thx mm43 That's very interesting. Looks...

Thx mm43

That's very interesting.

Looks like 6 sub-cells are put in parallel to a "master" cell of (1/8) 65 Ah.

Who/what is doing the internal balancing?
Forum: Rumours & News
3rd Feb 2013, 18:58
Replies: 82
Views: 51,322
Posted By hetfield

@HT Your post is the best joke on PPRuNe I...

@HT

Your post is the best joke on PPRuNe I have read.

Thanks:D
Forum: Rumours & News
3rd Feb 2013, 12:15
Replies: 2,185
Views: 1,034,988
Posted By hetfield

AP Exclusive: 787 Grounded, but Batteries Can Fly...

AP Exclusive: 787 Grounded, but Batteries Can Fly - ABC News (http://abcnews.go.com/Politics/wireStory/ap-exclusive-787-grounded-batteries-fly-18389906)

I fully agree with Sully.
Forum: Rumours & News
3rd Feb 2013, 12:06
Replies: 82
Views: 51,322
Posted By hetfield

Very fast CIR (Corporate Identity...

Very fast CIR

(Corporate Identity Removal):O

http://roma.corriere.it/media/foto/2013/02/03/AEREO_FU_122212--620x420.JPG
Forum: Tech Log
2nd Feb 2013, 13:33
Replies: 1,100
Views: 263,332
Posted By hetfield

Yes.. "Another fundamental architectural...

Yes..

"Another fundamental architectural change on the 787 is the use of variable frequency electrical power and the integration of the engine generator and starter functions into a single unit....
Forum: Tech Log
1st Feb 2013, 18:45
Replies: 1,100
Views: 263,332
Posted By hetfield

@Old Engineer Thx for the explanation:ok:

@Old Engineer

Thx for the explanation:ok:
Forum: Rumours & News
1st Feb 2013, 18:35
Replies: 2,185
Views: 1,034,988
Posted By hetfield

@Taunusflyer It isn't that simple... As...

@Taunusflyer

It isn't that simple...

As long there is just one cell (3.7 Volts) it's not rocket science.

If the voltage demand is higher, e.g. 28 Volts, you need 8 cells.

And there is the...
Forum: Rumours & News
1st Feb 2013, 14:30
Replies: 89
Views: 73,751
Posted By hetfield

Have been there many times. Not bad, ATC IMHO is...

Have been there many times. Not bad, ATC IMHO is one of the best of former UdSSR. ILS CATIIIB, approach procedures not too demanding, very long runway >4.000m.
Forum: Rumours & News
1st Feb 2013, 13:05
Replies: 2,185
Views: 1,034,988
Posted By hetfield

It doesn't have to be lead-acid NiCd and...

It doesn't have to be lead-acid

NiCd and NiMh do a good job.

Reliable, safe, cheap....
Forum: Tech Log
1st Feb 2013, 11:18
Replies: 68
Views: 67,699
Posted By hetfield

Single aisle? Loved the A300/310

Single aisle?

Loved the A300/310
Forum: Rumours & News
31st Jan 2013, 12:19
Replies: 2,185
Views: 1,034,988
Posted By hetfield

@SoS I fully agree...:ok:

@SoS

I fully agree...:ok:
Showing results 1 to 35 of 1000
 
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