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Search: Posts Made By: JD-EE
Showing results 1 to 35 of 113
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Forum: Tech Log
15th Jun 2011, 14:56
Replies: 2,070
Views: 616,304
Posted By JD-EE

RR_NDB Digital signals had no problems with...

RR_NDB

Digital signals had no problems with wire wrap connections in the 60s and 70s. That was one of the ways Burroughs built some of their mainframes in that era. I bet the RF was basically...
Forum: Tech Log
15th Jun 2011, 14:14
Replies: 2,070
Views: 616,304
Posted By JD-EE

icehart says, "(hope that does not apply to...

icehart says, "(hope that does not apply to Airbus)".

Sadly, it does. Solder pot connections don't work very well over time. Crimps work very well over time.

To see why solder pots (not wires...
Forum: Tech Log
15th Jun 2011, 14:04
Replies: 2,070
Views: 616,304
Posted By JD-EE

Roughly speaking - I cheated on the math...

Roughly speaking - I cheated on the math somewhat. Rudderrat posted the more correct equation from which mass drops out. I presumed a drop to zero velocity which is a cheat. It gives the general...
Forum: Tech Log
14th Jun 2011, 00:00
Replies: 2,070
Views: 616,304
Posted By JD-EE

Smilin - indeed wires and connectors can fail....

Smilin - indeed wires and connectors can fail. I've had it happen to me. It's usually when accompanied by "sharp" high frequency vibration. (The extreme case was in a vibration test environment when...
Forum: Tech Log
13th Jun 2011, 23:44
Replies: 2,070
Views: 616,304
Posted By JD-EE

bearfoil, may I suggest that while "did...

bearfoil, may I suggest that while "did everything it was supposed to do" may be true "did everything it was told to do" is more accurate to what the data shows?
Forum: Tech Log
13th Jun 2011, 23:29
Replies: 2,070
Views: 616,304
Posted By JD-EE

A33Zab, coincidences make me nervous. Why did...

A33Zab, coincidences make me nervous. Why did this not manifest on take off roll or even when the plane was "turned on?" The take off roll has the high frequency vibration that would work a connector...
Forum: Tech Log
13th Jun 2011, 23:04
Replies: 2,070
Views: 616,304
Posted By JD-EE

GY, I am sure the substance of the BEA release is...

GY, I am sure the substance of the BEA release is accurate as stated.

The cynic in me suggests it was to satisfy AirBus as AirBus leaked ever more data. It was finely crafted to really show only...
Forum: Tech Log
13th Jun 2011, 22:41
Replies: 2,070
Views: 616,304
Posted By JD-EE

henra - remember I am a cynic when politics,...

henra - remember I am a cynic when politics, lawyers, or marketing is involved.
I would invite you to make a case for any of the other involved people making the release with precisely the data...
Forum: Tech Log
13th Jun 2011, 22:27
Replies: 2,070
Views: 616,304
Posted By JD-EE

rudderrudderrat - The important lesson to pull...

rudderrudderrat - The important lesson to pull from the math is that the mass makes no difference in the physics class model.
Speaking of math - how does Mach .82 become something under 300 knots...
Forum: Tech Log
13th Jun 2011, 05:16
Replies: 2,070
Views: 616,304
Posted By JD-EE

3holeover, I'll give the bear that one. It is...

3holeover, I'll give the bear that one. It is quite natural to anthropomorphize inanimate objects. Why else are vehicles referred to as "she" so much in America?

"The a/c thought it was ok to...
Forum: Tech Log
13th Jun 2011, 04:57
Replies: 2,070
Views: 616,304
Posted By JD-EE

bearfoil, and third.... The BEA data...

bearfoil, and third....

The BEA data explicitly calls out a sudden change not any gradual process. How are the two reconciled?

edit: And it cites the sudden change as being downwards from 275...
Forum: Tech Log
13th Jun 2011, 04:56
Replies: 2,070
Views: 616,304
Posted By JD-EE

bearfoil, on the second issue I took issue with...

bearfoil, on the second issue I took issue with the implication in your words that the mass had a great deal to do with the "heavy" being able to trade velocity for altitude. In a vacuum it had...
Forum: Tech Log
13th Jun 2011, 04:49
Replies: 2,070
Views: 616,304
Posted By JD-EE

bearfoil, it is documented that AirBus was...

bearfoil, it is documented that AirBus was frantic with the coming air show. I presume they were demanding a release to show their aircraft is not at fault. That is about all that the release shows....
Forum: Tech Log
13th Jun 2011, 01:04
Replies: 2,070
Views: 616,304
Posted By JD-EE

Heathrow Flyer - sure the leaks stopped. AirBus...

Heathrow Flyer - sure the leaks stopped. AirBus has no incentive to leak anymore.
Forum: Tech Log
13th Jun 2011, 01:01
Replies: 2,070
Views: 616,304
Posted By JD-EE

Savrin, this is from the June 2009 report: ...

Savrin, this is from the June 2009 report:


This is from the 30 November 2009 report:


Neither believes this is a wiring problem. What makes you insist WRG means wiring rather than warning? I...
Forum: Tech Log
13th Jun 2011, 00:48
Replies: 2,070
Views: 616,304
Posted By JD-EE

Mr. Optimistic, please review the Tim Vasquez...

Mr. Optimistic, please review the Tim Vasquez plots of the storm and the plane's position in the storm. Check the visibility of the Moon at that time and location.

In order to see you need clear...
Forum: Tech Log
13th Jun 2011, 00:40
Replies: 2,070
Views: 616,304
Posted By JD-EE

RR_NDB, please meet BEA Release, especially the...

RR_NDB, please meet BEA Release, especially the rather highlighted piece of the report.



A "sharp fall" is not a gradual drop.
Forum: Tech Log
13th Jun 2011, 00:34
Replies: 2,070
Views: 616,304
Posted By JD-EE

bearfoil, I missed this the first time I read it....

bearfoil, I missed this the first time I read it. When I was reading RetiredF4 reply to you this quote REALLY bugged me: "This is a heavy a/c with beaucoups energy to sustain a short climb of 3k...
Forum: Tech Log
13th Jun 2011, 00:04
Replies: 2,070
Views: 616,304
Posted By JD-EE

RetiredF4 - small note. Could you change the...

RetiredF4 - small note. Could you change the subject, "tail was falling faster than the nose"? It conjures visions of a plane split in two, which didn't happen until impact. Without breaking the...
Forum: Tech Log
12th Jun 2011, 13:24
Replies: 2,070
Views: 616,304
Posted By JD-EE

I believe the report was released to show that...

I believe the report was released to show that the plane did everything the pilots told it to do so that AirBus could use that at an air show. The plane did what it was told to do and what published...
Forum: Tech Log
11th Jun 2011, 02:46
Replies: 2,070
Views: 616,304
Posted By JD-EE

Ah, Machinbird, I'd separated the roll and the...

Ah, Machinbird, I'd separated the roll and the pull up as two different problems. The roll correction should be automatic. The pull up was wrong. So I suppose "do nothing at all" is probably wrong....
Forum: Tech Log
9th Jun 2011, 22:54
Replies: 2,070
Views: 616,304
Posted By JD-EE

Gums, I was starting to read PJ2's posting with...

Gums, I was starting to read PJ2's posting with its quote from your 1698 when a coin dropped in my mind.

I got this far, "So a constant, even a small aft stick, that is commanding maybe 1.1...
Forum: Tech Log
9th Jun 2011, 22:36
Replies: 2,070
Views: 616,304
Posted By JD-EE

Bearfoil, is it a total blunder if you have a UAS...

Bearfoil, is it a total blunder if you have a UAS condition to apply UAS procedures? Did he pull the stick before the stall warning or after? It appears to be "before" in the rude imprecise...
Forum: Tech Log
9th Jun 2011, 22:00
Replies: 2,070
Views: 616,304
Posted By JD-EE

PJ2 made a comment I hoped to elicit, "DO NOTHING...

PJ2 made a comment I hoped to elicit, "DO NOTHING was the correct response and that is the action which would have "prevented" the loss of control."

I also note that something like this had...
Forum: Tech Log
9th Jun 2011, 21:03
Replies: 2,070
Views: 616,304
Posted By JD-EE

That's why I'd NOT turn off the stall warning of...

That's why I'd NOT turn off the stall warning of there is no weight on the wheels. I'd add an altitude test if there's a reliability problem with only using weight on wheels.

Then it may be wise...
Forum: Tech Log
9th Jun 2011, 12:29
Replies: 2,070
Views: 616,304
Posted By JD-EE

RetiredF4, this needs definition, "at or close to...

RetiredF4, this needs definition, "at or close to the maximum recommended FL".

Some discussion here has suggested it was not particularly near maximum recommended FL and had a considerable speed...
Forum: Tech Log
9th Jun 2011, 12:20
Replies: 2,070
Views: 616,304
Posted By JD-EE

Ah, NoD, I am willing to suggest an A330-200 at...

Ah, NoD, I am willing to suggest an A330-200 at 1000' AGL going 60 knots is in deep deep fertilizer. You seem to be saying that the warning about this is unwarranted and should be turned off. I'm...
Forum: Tech Log
9th Jun 2011, 12:16
Replies: 2,070
Views: 616,304
Posted By JD-EE

Ah yes, Nigel, then why did the plane transition...

Ah yes, Nigel, then why did the plane transition from Mach 0.8 into a stall merely because the reported airspeed became incoherent and went to a very low number?



If it is stall warning is...
Forum: Tech Log
9th Jun 2011, 06:19
Replies: 2,070
Views: 616,304
Posted By JD-EE

Indeed, unless they suddenly magically entered a...

Indeed, unless they suddenly magically entered a serious breeze, 100 knots or more, the AoA would not have changed. So why did those stall warnings take place? The warning after the climb was right...
Forum: Tech Log
9th Jun 2011, 05:56
Replies: 2,070
Views: 616,304
Posted By JD-EE

Rush To Judgement

So it has begun in earnest. Such a rush is ALWAYS an attempt to cover up real failings by blaming those who cannot be present and have no meaningful advocate.

If anything I'd side with bearfoil on...
Forum: Tech Log
9th Jun 2011, 05:35
Replies: 2,070
Views: 616,304
Posted By JD-EE

(mumble-mumble) Nigel remarked With that in...

(mumble-mumble) Nigel remarked

With that in mind Murphy, I am willing to have the stall warning go away at 60kts if you are say 1000' above ground level and not replace it with something else....
Forum: Tech Log
9th Jun 2011, 03:18
Replies: 2,070
Views: 616,304
Posted By JD-EE

Re: POB Fall sensation

RR_NDB (http://www.pprune.org/members/349485-rr_ndb), you might consider what I said about feeling acceleration and not velocity. They might have felt the plane shuddering and all that. They'd not...
Forum: Tech Log
7th Jun 2011, 22:03
Replies: 2,070
Views: 616,304
Posted By JD-EE

rgbrock1 One feels acceleration. One does...

rgbrock1

One feels acceleration. One does not feel velocity.
Forum: Tech Log
7th Jun 2011, 21:42
Replies: 2,070
Views: 616,304
Posted By JD-EE

Comment to my own lengthy posting with BEA...

Comment to my own lengthy posting with BEA quotes. Here is a link...
Forum: Tech Log
7th Jun 2011, 21:34
Replies: 2,070
Views: 616,304
Posted By JD-EE

Where as the English report shows only the...

Where as the English report shows only the following:

The French report seems to agree:
So BEA quotes nothing at all for 2:11:45 in either report. Here are their links, English...
Showing results 1 to 35 of 113
 
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