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Search: Posts Made By: JD-EE
Showing results 1 to 35 of 125
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Forum: Tech Log
26th May 2011, 23:28
Replies: 2,546
Views: 935,934
Posted By JD-EE

CogSim, in other words he experienced what is...

CogSim, in other words he experienced what is known in the vernacular as a WTF event only in politer and more professional words. (And that may well indicate either upbringing or more likely the fact...
Forum: Tech Log
26th May 2011, 23:25
Replies: 2,546
Views: 935,934
Posted By JD-EE

Thinking of that last statement of mine, it may...

Thinking of that last statement of mine, it may make even more sense when you dig into it. The pilots are given control of a plane the computers cannot handle. (Ran out of program memory or design...
Forum: Tech Log
26th May 2011, 23:22
Replies: 2,546
Views: 935,934
Posted By JD-EE

Machinbird, "We still have the problem of what to...

Machinbird, "We still have the problem of what to do when the reading is invalid on multiple sensors."

At least the scope of the problem is reduced if until that report the plane was flying...
Forum: Tech Log
26th May 2011, 22:18
Replies: 2,546
Views: 935,934
Posted By JD-EE

sensor_validation, I get the impression that one...

sensor_validation, I get the impression that one of the best improvements for a pitot would be some form of airflow measurement out of the drain hole. If either the probe or the hole ices the airflow...
Forum: Tech Log
26th May 2011, 22:08
Replies: 2,546
Views: 935,934
Posted By JD-EE

CogSim, the last line of your recognizing icing...

CogSim, the last line of your recognizing icing posting prompted an "Oh goodie!" from me - in a very sarcastic tone.

"Under some icing conditions, even a 3-minute exposure can substantially affect...
Forum: Tech Log
25th May 2011, 04:34
Replies: 2,546
Views: 935,934
Posted By JD-EE

deSitter, they might be considered to have killed...

deSitter, they might be considered to have killed themselves because of overreliance on air transportation. (If you can be crass I can trump you. If you think the programmers, designers, and...
Forum: Tech Log
25th May 2011, 04:23
Replies: 2,546
Views: 935,934
Posted By JD-EE

OK465, inertial AOA, speed. and all that is fine...

OK465, inertial AOA, speed. and all that is fine in more or less still air or air that is moving horizontally - as happens "99.44%" of the time. When there is an updraft the real AOA may be somewhat...
Forum: Tech Log
25th May 2011, 00:57
Replies: 2,546
Views: 935,934
Posted By JD-EE

infrequentflyer789, the proper way to handle...

infrequentflyer789, the proper way to handle changes like that is to charge what it costs and profit margin to recode and KNOW what that cost is. With Ada that is expensive. It tends to get the...
Forum: Tech Log
25th May 2011, 00:48
Replies: 2,546
Views: 935,934
Posted By JD-EE

Yankee Whiskey, that report certainly looks fully...

Yankee Whiskey, that report certainly looks fully as self-serving for "certain parties" as the other "leaks" I've seen. I am betting these are "leaks" from various interested parties rather than from...
Forum: Tech Log
25th May 2011, 00:41
Replies: 2,546
Views: 935,934
Posted By JD-EE

KMD - 16k seems to be a very fancy advanced RTOS...

KMD - 16k seems to be a very fancy advanced RTOS to me. The OM-55 Navy SatCom modem used 32k for the entire program and had 16k, with spare space, for RAM. This involved a full multi-tasking (time...
Forum: Tech Log
25th May 2011, 00:17
Replies: 2,546
Views: 935,934
Posted By JD-EE

That would be the moment the aircraft instruments...

That would be the moment the aircraft instruments are turned on. Air moves independently (more or less) of the ground below. Planes go through fronts. The trick is to isolate a set of "signatures"...
Forum: Tech Log
24th May 2011, 23:34
Replies: 2,546
Views: 935,934
Posted By JD-EE

ion berkeley, I'm glad I am not the only one here...

ion berkeley, I'm glad I am not the only one here who might defend Ada. I have seen it work very well to produce military grade software under budget and with far fewer bugs than normal for the size...
Forum: Tech Log
24th May 2011, 23:20
Replies: 2,546
Views: 935,934
Posted By JD-EE

wozzo, if that WSJ quote resembles what actually...

wozzo, if that WSJ quote resembles what actually happened I do not figure that is pilot error. I take that as a system design failure, which falls into the AirBus lap.
Forum: Tech Log
24th May 2011, 23:01
Replies: 2,546
Views: 935,934
Posted By JD-EE

As SLF who is old enough to remember such comedy...

As SLF who is old enough to remember such comedy routines as "Grace L. Furgesun Airline and Storm Door Company" or Bob Newhart's gems I surely can... surely can... surely can... surely can...

(Is...
Forum: Tech Log
24th May 2011, 22:58
Replies: 2,546
Views: 935,934
Posted By JD-EE

Smilin Ed quoting slats "If these systems fail,...

Smilin Ed quoting slats "If these systems fail, then control is thrown back to the pilots...."

As Self Loading Freight I find the thought that the automation flies the plane almost exclusively...
Forum: Tech Log
23rd May 2011, 18:18
Replies: 2,546
Views: 935,934
Posted By JD-EE

syseng68k, PLCs are slow, dumb, ladder logic...

syseng68k, PLCs are slow, dumb, ladder logic tools that are dumb enough to be 100% predictable in their operation. That is why they are used in industry and safety critical applications. You seem to...
Forum: Tech Log
23rd May 2011, 18:11
Replies: 2,546
Views: 935,934
Posted By JD-EE

DozyWannabee, syseng68k was describing something...

DozyWannabee, syseng68k was describing something close to what is done with the shuttle's code. The people writing the software are looking over each other's shoulders looking for faults. The...
Forum: Tech Log
23rd May 2011, 10:13
Replies: 2,546
Views: 935,934
Posted By JD-EE

Safety Concerns, your post brought me back to one...

Safety Concerns, your post brought me back to one of my hobbyhorses, the plane being out of communications.

Suppose the storm looked too large for them to go around without contacting DAKAR. That...
Forum: Tech Log
23rd May 2011, 10:06
Replies: 2,546
Views: 935,934
Posted By JD-EE

Mr Optimistic, I'd not be at all surprised if the...

Mr Optimistic, I'd not be at all surprised if the BEA and other organizations have at their disposal a tool that "plays back" the FDR recordings into a video animation of the plane and the cockpit.
...
Forum: Tech Log
22nd May 2011, 14:13
Replies: 2,546
Views: 935,934
Posted By JD-EE

gums, I am starting to wonder if the leaks are...

gums, I am starting to wonder if the leaks are from BEA or people reading this stuff and thinking, "Oh, that sounds like it will sell newspapers!"
Forum: Tech Log
22nd May 2011, 13:36
Replies: 2,546
Views: 935,934
Posted By JD-EE

Dozy, it's more of a cost benefit issue. For...

Dozy, it's more of a cost benefit issue. For newer aircraft right off the production line fancier CVRs might come automatically. But retrofitting them would cost way more than the benefit when you...
Forum: Tech Log
22nd May 2011, 13:34
Replies: 2,546
Views: 935,934
Posted By JD-EE

takata, I suspect some of the data will remain...

takata, I suspect some of the data will remain sealed "forever" in the interests of the victim's privacy.
Forum: Tech Log
21st May 2011, 08:18
Replies: 2,546
Views: 935,934
Posted By JD-EE

RR_NDB, what would "hi-fi" bring to the table...

RR_NDB, what would "hi-fi" bring to the table other than a lot of noise that would have to be filtered away to hear the voice clearly? Surely as a ham radio operator you have played with filters to...
Forum: Tech Log
21st May 2011, 07:53
Replies: 2,546
Views: 935,934
Posted By JD-EE

jcjeant, I suppose it is morally correct to slam...

jcjeant, I suppose it is morally correct to slam the victims families back and forth trying to deflect their suit with a purely preliminary observation on the data. Suppose that given what Le Figaro...
Forum: Tech Log
21st May 2011, 07:34
Replies: 2,546
Views: 935,934
Posted By JD-EE

jcjeant, speaking in USA terms BEA has an...

jcjeant, speaking in USA terms BEA has an absolute right to criticize Le Figaro for its sloppy reporting and request that they shut the (whatever) up. And Le Figaro has an absolute right to go on...
Forum: Tech Log
20th May 2011, 16:48
Replies: 2,546
Views: 935,934
Posted By JD-EE

bearfoil, I'd meant to type in "But if nothing...

bearfoil, I'd meant to type in "But if nothing will break if you sit there looking blank while you ponder the situation, check a few dials, and then proceed." Does the addition of the if make more...
Forum: Tech Log
20th May 2011, 15:43
Replies: 2,546
Views: 935,934
Posted By JD-EE

deSitter, there is a second issue that has me...

deSitter, there is a second issue that has me bemused. It's about the GIMME button. If it is supposed to give you an airplane to fly, and it is basically fly by wire, would you care to define what...
Forum: Tech Log
20th May 2011, 15:38
Replies: 2,546
Views: 935,934
Posted By JD-EE

Mr. deSitter, please understand IT professionals...

Mr. deSitter, please understand IT professionals a little better.

If you are sitting in an airplane, push the button to start engine 1 and nothing happens do you sit and think before you push the...
Forum: Tech Log
20th May 2011, 15:17
Replies: 2,546
Views: 935,934
Posted By JD-EE

In theory (and I presume practice) if you rotate...

In theory (and I presume practice) if you rotate these essentially solid state no moving parts instruments fast enough or accelerate the rotation fast enough you may overrun some counter that is...
Forum: Tech Log
19th May 2011, 06:38
Replies: 2,546
Views: 935,934
Posted By JD-EE

.. let's not go down this path, please. JT

.. let's not go down this path, please. JT
Forum: Tech Log
19th May 2011, 06:12
Replies: 2,546
Views: 935,934
Posted By JD-EE

RR_NDB asks why not better fidelity on the CVR...

RR_NDB asks why not better fidelity on the CVR for the headset microphones.

I'd suggest that by the time you get through the first stages of audio processing past the microphone the signal is...
Forum: Tech Log
19th May 2011, 06:08
Replies: 2,546
Views: 935,934
Posted By JD-EE

Lonewolf_50, are you familiar with how a l@ser...

Lonewolf_50, are you familiar with how a l@ser ring inertial reference works? Your remarks suggest you are unfamiliar with it and are extrapolating from physical gyroscopes. I'm sitting here...
Forum: Tech Log
19th May 2011, 05:49
Replies: 2,546
Views: 935,934
Posted By JD-EE

Right on the mark. It is also a way to clean up...

Right on the mark. It is also a way to clean up very dirty electronics, except for all kinds of disk drives that contain moving elements.

Pop out the clock battery. Wash it down well. Ideally use...
Forum: Tech Log
19th May 2011, 05:28
Replies: 2,546
Views: 935,934
Posted By JD-EE

This can maybe appears in the next BEA report ...

The people who wrote that article should be utterly ashamed of themselves. There was no "co-pilot" on the plane. All three were full up qualified pilots. Having a "co-pilot" at the controls in no way...
Forum: Tech Log
18th May 2011, 07:06
Replies: 2,546
Views: 935,934
Posted By JD-EE

I thought I remembered that but I was not sure....

I thought I remembered that but I was not sure. I, too, figured it was an O-Ring keeping out the water. But I was not sure if they meant a bakeout without opening or after or both. (Again, I'd have...
Showing results 1 to 35 of 125
 
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