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2nd Aug 2015, 13:00
Replies: 918
Views: 1,038,318
Posted By BJ-ENG

2nd Aug Debris at La Reunion - Boiling Pot/Kettle

Interflug, I think you are spot on.

I suspect that what we are looking at is an early version of one of these:

Fire Maple FMC XT1 Outdoor Camping Heat Exchanger Aluminium Kettle Boil...
2nd Aug 2015, 10:41
Replies: 918
Views: 1,038,318
Posted By BJ-ENG

Debris would have passed through shipping lane

Given that debris would have passed through a busy shipping lane, lets hope that a navigation warning or directive has now gone out to vessels transiting the area to keep a look out for other...
15th Jan 2015, 14:51
Replies: 3,924
Views: 3,816,714
Posted By BJ-ENG

@A0283: "Before doing that, my line of thinking...

@A0283: "Before doing that, my line of thinking on water landing (before I read your reply, so there may be some duplication in it) was roughly thinking about two different and both basic...
14th Jan 2015, 20:56
Replies: 3,924
Views: 3,816,714
Posted By BJ-ENG

Aerodynamic and Hydrodynamic etc

@A0283:


With respect, nothing that I have seen so far leads me to believe that the main body of the aircraft was separated from the aft section prior to impact with the surface of the ocean....
12th Jan 2015, 11:33
Replies: 3,924
Views: 3,816,714
Posted By BJ-ENG

"It exploded because of the pressure," he told ...

"It exploded because of the pressure," he told reporters in the town of Pangkalan Bun on Borneo island, the search headquarters. "The cabin was pressurised and before the pressure of the cabin ...
10th Jan 2015, 11:25
Replies: 3,924
Views: 3,816,714
Posted By BJ-ENG

Slightly bigger photo on this site plus a bit...

Slightly bigger photo on this site plus a bit more info.


AirAsia Flight 8501: Tail Recovered - WSJ (http://www.wsj.com/articles/airasia-flight-8501-tail-recovered-1420878809)


The...
6th Aug 2014, 13:09
Replies: 1,644
Views: 2,026,323
Posted By BJ-ENG

Sudden decompression

Re: Glueball comment on quote: "Between the sudden decompression and the blast wave of the warhead detonation, it was instant for everybody."




An alternative and possibly more realistic...
29th Mar 2014, 21:59
Replies: 11,824
Views: 21,413,383
Posted By BJ-ENG

Yes, Water landings are hard too!

To add to the many suggestions attempting to ponder the question regarding a water landing for any aircraft, and particularly a large wide body aircraft like a 777, it is worth pointing out some of...
12th Mar 2014, 23:16
Replies: 11,824
Views: 21,413,383
Posted By BJ-ENG

T7 ditch

Quote: T7 at low speed? If it remained in one or two pieces, how long could you reasonably expect it to float?




Even at relatively low speeds, the effect of hydraulic surge will rip away...
Forum: Tech Log
11th Aug 2011, 16:33
Replies: 1,998
Views: 408,752
Posted By BJ-ENG

It may be true that seeing is believing, but just as true that believing is seeing.

@overthewing



Maybe there is something in that statement....

Article 3 - Inattentional blindness: let's not blame the victim just yet : The Canadian Aviation Maintenance Council / Le...
Forum: Tech Log
3rd Jun 2011, 20:19
Replies: 2,070
Views: 485,465
Posted By BJ-ENG

PJ2 & Gums - Nicely put.. Just to add some...

PJ2 & Gums - Nicely put..

Just to add some quotes from two publications well worth the read, and particularly relevant.

Nancy Leveson (Safeware - System safety and computers -1995)
...
Forum: Tech Log
31st May 2011, 09:41
Replies: 2,070
Views: 485,465
Posted By BJ-ENG

He must have asked and they will have explained ...

@NWR

Thanks for the Tarom ROT381 video link.

The BEA incident report (24 September 1994) makes for an interesting comparison with the current discussion.
...
Forum: Tech Log
31st May 2011, 09:02
Replies: 2,070
Views: 485,465
Posted By BJ-ENG

On the fundamental issue of the design of cockpit information systems

@ventus45



Good references - certainly worth the read..

Many thanks...
Forum: Tech Log
30th May 2011, 18:19
Replies: 2,070
Views: 485,465
Posted By BJ-ENG

Can airliners recover from a stall?

Discussion of mixed type, but worth revisiting.

Interesting, particularly post #18 and further pages.

http://www.pprune.org/tech-log/173167-can-airliners-recover-stall.html
Forum: Tech Log
29th May 2011, 20:48
Replies: 2,070
Views: 485,465
Posted By BJ-ENG

Flush Airdata Sensing (FADS) System

@Machinebird



You might find this of interest:
http://www.nasa.gov/centers/dryden/pdf/88651main_H-2379.pdf

http://www.spaceagecontrol.com/nasa-tm-104316.pdf
Forum: Tech Log
28th May 2011, 21:06
Replies: 2,070
Views: 485,465
Posted By BJ-ENG

Post #237 (Svarin) and post #260 (mm43) are both...

Post #237 (Svarin) and post #260 (mm43) are both recommended reading.

Re #237 : Svarin's speculation has a certain uncomfortable ring of truth. Protection mechanisms can be a doubled edged, and...
Forum: Tech Log
24th May 2011, 20:59
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

@Diversification Thanks for the link....

@Diversification


Thanks for the link. Nice idea, but from the description of its limitations it sounds like it would not have been of much help. One of the principles I learnt as a systems eng...
Forum: Tech Log
19th May 2011, 22:26
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

Just to add some fuel to the discussion; some...

Just to add some fuel to the discussion; some interesting quotes from NASA's initiative on Integrated Resilient Aircraft Control (IRAC) -“Stability, Maneuverability, and Safe Landing in the Presence...
Forum: Tech Log
15th May 2011, 08:53
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

"CFIS" v CFIT

Rough seas (wave height) will have some influence, but depends on alignment of aircraft fuselage relative to wave direction.

Vertical scenario: Across wave crest will provide some small...
Forum: Tech Log
13th May 2011, 23:31
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

Debris distribution

Some ideas based on MIT and US Navy studies on understanding the dynamics of three-dimensional objects freely falling through water.

As a crude rule of thumb, objects with a centre of mass...
Forum: Tech Log
8th May 2011, 22:46
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

Post-Stall and Spin Dynamics of Large Transport Aircraft

@mm43 et el

Recent NASA papers:

https://engineering.purdue.edu/~andrisan/Courses/AAE490A_S2010/Buffer/Spin/20070005804_2007005369.pdf
...
Forum: Tech Log
6th May 2011, 19:49
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

@ bearfoil I think the answer to...

@ bearfoil



I think the answer to your question is more to do with scavengers....

Bathypelagic Zone - 1000 m down to 4000m
A surprisingly large number of creatures are to be found in...
Forum: Tech Log
4th May 2011, 17:52
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

@jcjeant I think this may be galvanic...

@jcjeant


I think this may be galvanic action where the aluminium housing of the pinger is acting as an anode and is corroding rather than the ferrous cylinder. Further evidence of this is that...
Forum: Tech Log
3rd May 2011, 11:50
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

@lomapaseo If I deal with your...

@lomapaseo



If I deal with your question on pressure first; at 4000m, the pressure at that depth is 398atm, or 403 bar, or 411 kgf/cm2, or 5846psi, or 2.9tons/sqin. Starting from the point...
Forum: Tech Log
2nd May 2011, 12:34
Replies: 2,546
Views: 729,045
Posted By BJ-ENG

Fdr/cvr data recovery

@ Noske


Thanks for that.

Interesting that the BEA had problems with memory cards and Honeywell found shorts on the board. Sounds like it could have been shock vibration damage to the die...
Showing results 1 to 25 of 57
 


 
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