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Search: Posts Made By: Old Engineer
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31st Aug 2014, 04:54
Replies: 151
Views: 65,887
Posted By Old Engineer

Here's a little help on that -0.6 [or -0,6 across...

Here's a little help on that -0.6 [or -0,6 across the pond] number. It is not an earthquake magnitude. It is actually a measure of whether the volcano that might erupt (Bardadur--sp?) is either...
12th Mar 2014, 23:51
Replies: 11,824
Views: 21,523,908
Posted By Old Engineer

Chinese image of seabed, not surface?

At 2203 Z today, FE Hoppy quoted Pixie:

Quote:
According to various news sources (CNN & Daily Mail) - the debris and oil slick is in the area initially...
18th Nov 2013, 21:22
Replies: 1,150
Views: 641,352
Posted By Old Engineer

Well, from an engineering standpoint, as I see...

Well, from an engineering standpoint, as I see it:

The replacement section is already on site;
The interior finish reeks of smoke and hazardous particulates, and so is likely already out...
...
16th Apr 2013, 05:19
Replies: 2,186
Views: 921,380
Posted By Old Engineer

I've not yet seen actual figures that will...

I've not yet seen actual figures that will support this statement. What I have seen is schematics of left side and right side ECS modules, each with 2 compressors; not sure if this means two ECS...
12th Apr 2013, 21:39
Replies: 2,186
Views: 921,380
Posted By Old Engineer

@Machaca I would not read redundancy...

@Machaca



I would not read redundancy into having the engine and APU generators in pairs at each of the three locations. Rather, I would identify reasons for the smaller generators, having...
7th Apr 2013, 23:34
Replies: 2,186
Views: 921,380
Posted By Old Engineer

@Captplaystation Your comment is sobering...

@Captplaystation

Your comment is sobering and should be kept in mind by all. There are is a just reported feature about the compressor system which puzzles me.

OE
Forum: Tech Log
5th Apr 2013, 05:12
Replies: 1,100
Views: 188,618
Posted By Old Engineer

Size of APU alternators; amount of frequency variation

Hamilton Sundstrand is the maker (possibly European sales use a different source) of the alternators driven by the 787 APU. These are 225 KVA units (each; I put that = 180 KW) intended to have a...
4th Apr 2013, 22:29
Replies: 2,186
Views: 921,380
Posted By Old Engineer

A spark from a nicked or worn wire to an in-tank...

A spark from a nicked or worn wire to an in-tank fuel gage occurred in the fuel-air mixture space over the fuel surface in a main fuel tank. At that moment this mixture happened to be explosive. By...
Forum: Tech Log
4th Apr 2013, 05:25
Replies: 1,100
Views: 188,618
Posted By Old Engineer

@3-HL Thanks for the answer. The "Hot Battery...

@3-HL Thanks for the answer. The "Hot Battery Bus" I would think of as the "tie bus." A tie bus was usually broken in the center, but kept powered from either end with the load roughly divided in...
Forum: Tech Log
4th Apr 2013, 00:05
Replies: 1,100
Views: 188,618
Posted By Old Engineer

I spent the late hours of last night reading the...

I spent the late hours of last night reading the entire corporate page of ZodiacAerospace (it was an e-copy of their annual report). Zodiac apparently made the Zodiac boats that Cousteau was always...
2nd Apr 2013, 05:32
Replies: 2,186
Views: 921,380
Posted By Old Engineer

@syseng68k Well, I did re-read your...

@syseng68k



Well, I did re-read your post of yesterday, and in the clear light of day I can't understand why I thought you had accidentally confused NC with NO. I have to stop posting at 3 in...
1st Apr 2013, 06:24
Replies: 2,186
Views: 921,380
Posted By Old Engineer

@syseng68k If I may, I think the...

@syseng68k



If I may, I think the action you describe above (energized coil drops out on low coil voltage) to indicate the behavior of a "normally closed contact" instead describes the...
Forum: Tech Log
6th Feb 2013, 18:57
Replies: 1,100
Views: 188,618
Posted By Old Engineer

No time to comment, but to repeat a famous quote,...

No time to comment, but to repeat a famous quote, "I shall retun."

Your orders for the day are to redesign the battery space to hold a NiCad or NiMH if that becomes necessary. Find a separate...
Forum: Tech Log
5th Feb 2013, 06:23
Replies: 1,100
Views: 188,618
Posted By Old Engineer

@saptzae (#369) Thanks for commenting on my...

@saptzae (#369)

Thanks for commenting on my post (#364) about charging arrangements and balancing. The TI seminar talk on this was most interesting:



I was struck by how much remains...
Forum: Tech Log
1st Feb 2013, 07:37
Replies: 1,100
Views: 188,618
Posted By Old Engineer

Help from Kirchoff

Comments about this have appeared several times. Perhaps I can describe a way in which this could be done.

We want to pass a slightly different charging current through each cell. Instead of 8...
Forum: Tech Log
30th Jan 2013, 05:00
Replies: 1,100
Views: 188,618
Posted By Old Engineer

WSJ Article

This past day (Tues) the Wall Street Journal reported on its front page that an industry standards organization (unnamed on front page) had disagreed with Boeing on the choice of battery then being...
Forum: Tech Log
7th Aug 2011, 05:15
Replies: 1,998
Views: 419,729
Posted By Old Engineer

32,768

Just a number to many people. It is in takata's post a bit above, #1698. But it has a special significance in computer programming. It is half of a "64K" space, sometimes called a page space. In the...
Forum: Tech Log
4th Aug 2011, 23:06
Replies: 1,998
Views: 419,729
Posted By Old Engineer

The Graph, totally misinterpreted

takata,

Saw your comment in the "reply" window on recent comments. It's gone, but it made me smile. I'll never be a French speaker until I understand that they omit all information that would...
Forum: Tech Log
4th Aug 2011, 22:53
Replies: 1,998
Views: 419,729
Posted By Old Engineer

[email protected]

MW

Thanks for your comments. In addition to that, I realize now that I completely misinterpreted this graph as representing the actions of the aircraft. After a lot of careful reading, I see that...
Forum: Tech Log
4th Aug 2011, 21:01
Replies: 1,998
Views: 419,729
Posted By Old Engineer

A33Zab-- Selected vertical speed? (Post #1497)

I've deleted this post as I misinterpreted the selected vertical speed (green line) to be intermittant commands in the A/C computer, whereas they are intermittent sampling of commands having...
Forum: Tech Log
2nd Aug 2011, 01:16
Replies: 1,998
Views: 419,729
Posted By Old Engineer

A33Zab

Thank you for the useful information of your last post (00:24 Z on 2d). I'd say you have to be very well informed. I mean, it's more than just having a manual lying around. I have some questions--...
Forum: Tech Log
1st Aug 2011, 22:06
Replies: 1,998
Views: 419,729
Posted By Old Engineer

mm43

Thanks for bringing me up to speed on the Captain's change-of-command instructions. I read his statement in the French, but this was one of those times when I relied on my own French, even though to...
Forum: Tech Log
1st Aug 2011, 21:19
Replies: 1,998
Views: 419,729
Posted By Old Engineer

Wiggy

Yes, that is a good point. Although it does appear that PNF was issuing instructions to PF which possibly were not being followed. But then, without the tone of the statements, what was being said...
Forum: Tech Log
1st Aug 2011, 20:19
Replies: 1,998
Views: 419,729
Posted By Old Engineer

Lonewolf 50 I would think PNF would have...

Lonewolf 50

I would think PNF would have been PIC in the Captain's absence. He had by far the greater total hours and hours in type, of the two, IIRC. Although, he had just come off "vacation"--...
Forum: Tech Log
14th Jul 2011, 07:23
Replies: 1,998
Views: 419,729
Posted By Old Engineer

mm43 wrote: The reference is to the ND...

mm43 wrote:

The reference is to the ND input by PF.

The question that must be asked is, did PF think that he could recover given enough altitude, but that at that point realize that the A/C...
Showing results 1 to 25 of 76
 


 
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