Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

AF447 wreckage found

Tech Log The very best in practical technical discussion on the web

AF447 wreckage found

Old 5th Apr 2011, 09:48
  #41 (permalink)  
 
Join Date: Oct 2003
Location: Hampshire, UK
Posts: 207
Likes: 0
Received 0 Likes on 0 Posts
Easy to forget that it is a very, very big ocean, and acoustic conditions have so many variables it is not a straightforward matter to determine why the boxes active sonar wasn't easily detectable.

Keep in mind the area size here; even 10sq miles is a massive area in subsea operations. Hats off to all involved for locating the site.
JamesT73J is offline  
Old 5th Apr 2011, 11:01
  #42 (permalink)  
PFR
Gamekeeper
 
Join Date: Aug 2000
Location: South East
Age: 61
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts
Arrow

Thanks Mickk. Found them through the Techlog thread on the BEA site. Interesting discussion over there, including whether that gear was in the extended position prior to impact - the origin of my query really. For ref that's a very good thread to be following for the technically minded.
Well done to the investigating team and its partners for getting to this stage.
PFR is offline  
Old 5th Apr 2011, 11:17
  #43 (permalink)  
 
Join Date: Mar 2005
Location: England
Posts: 730
Likes: 0
Received 0 Likes on 0 Posts
More images from the BEA
Fargoo is offline  
Old 5th Apr 2011, 11:51
  #44 (permalink)  
Psychophysiological entity
 
Join Date: Jun 2001
Location: Tweet Rob_Benham Famous author. Well, slightly famous.
Age: 84
Posts: 3,263
Received 24 Likes on 15 Posts
What are we seeing in the vertical scan . . . is terrain supporting the vertical displacement of specific metal objects?

I had thought it was flatter than that at the site.
Loose rivets is online now  
Old 5th Apr 2011, 13:00
  #45 (permalink)  
 
Join Date: Apr 2006
Location: USA
Posts: 21
Likes: 0
Received 0 Likes on 0 Posts
Side Scan Sonar

Even though this is a side scan sonar image, I believe the orientation is mainly one of looking down at the ocean bottom and showing the distribution of wreckage on the ocean floor as seen from above. Fairly tight cluster of wreckage to me means the aircraft was largely intact when it hit the ocean surface and sank.
jfill is offline  
Old 5th Apr 2011, 13:53
  #46 (permalink)  
 
Join Date: Aug 2009
Location: MKE
Age: 68
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
Past drift analysis

There used to be some excellent analysis in the old forum (MM43, Greatbear etal) on drift and potential final location. It would be interesting to know how accurate the analysis was.
rfp172 is offline  
Old 5th Apr 2011, 14:05
  #47 (permalink)  
 
Join Date: Jan 2008
Location: USA
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
I suggest you (and others here) go to the "old" thread on the Tech Log forum and see what is and has been going on.
kappa is offline  
Old 5th Apr 2011, 18:04
  #48 (permalink)  
 
Join Date: Jun 2007
Location: london
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
I’m not a conspiracy theorist but those data recorders would have been putting out the equivalent of a heavy rock-concerts worth of sound to any sub-surface military listening device. And that relatively compact debris site would have been a magnetic sea-bed anomaly the size of a skyscraper, even to a looking satellite. This one does make me scratch my head (and few other parts of my anatomy). I really believe the technology exists to have found this wreckage before now. Which must beg the question ‘why wasn’t it found until now’ ? and the answer to that can only be because it wasn’t convenient. For what reason we don’t know, will never know !
memyself is offline  
Old 5th Apr 2011, 18:16
  #49 (permalink)  
 
Join Date: Jan 2008
Location: London
Age: 68
Posts: 1,269
Likes: 0
Received 0 Likes on 0 Posts
memyself,

if you care to read the original thread in the tech log section you will find that your question too has been answered there.

What a name you have.... I smell a conspiracy just in that name!
vanHorck is offline  
Old 5th Apr 2011, 18:33
  #50 (permalink)  
 
Join Date: Jun 2009
Location: VA, USA
Age: 58
Posts: 578
Received 0 Likes on 0 Posts
And that relatively compact debris site would have been a magnetic sea-bed anomaly the size of a skyscraper, even to a looking satellite. This one does make me scratch my head (and few other parts of my anatomy). I really believe the technology exists to have found this wreckage before now. Which must beg the question ‘why wasn’t it found until now’ ?
For there to be a magnetic anomaly there needs to be material with magnetic properties (or a moving body through a conductive liquid).

What is a modern airliner made of? Not magnetic stuff.

I think you want to see conspiracy where none likely exists. And that in itself speaks volumes.

GarageYears is offline  
Old 5th Apr 2011, 19:20
  #51 (permalink)  
wozzo
Guest
 
Posts: n/a
Originally Posted by memyself
I’m not a conspiracy theorist but ...
This accident ist perfect for conspiracy theorists (not that OP claims one to be):

If they had found the wreck immediately ...
... then they would have known beforehand that it would crash there

If they had found the wreck after a long search
... read above

If they hadn't found the wreck at all
... well, that explains itself
 
Old 5th Apr 2011, 20:08
  #52 (permalink)  
 
Join Date: Apr 2011
Location: Toulouse
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Salut les gars! Hi guys!

well, it may be time to wipe off the fog from your glasses

Of course, "they" do know where the wreckage is .... since long time.

Just remember the means deployed during the search phase 1, 2 & 3.

Now, just focused on search phase 3 and look at the searched areas on the following map (extract from BEA - Point of the situation) - sorry, it is in french - :
http://www.bea.aero/fr/enquetes/vol....phase.3.fr.jpg

By coïncidence, the abyssal plain where is sitting the wreckage has not being expored...
Remember again, just after the crash, a brazilian air patrouilleur found and oil puddle nearby the last known A330 point of report, and, still by coïncidence, no submarine search was conducted around this area....

Still in memory, a french submarine vessel was involved during the search phase 1 (just after crash). The job of the submarine is to LISTEN, with its sophisticated listenning device, any sound in a wide sound spectrum. The french navy has listened some thing..... and then a public communication said that there is mistake in the interpretation /localisation of the sound (mistaken with a beluga cry).

What's next? Easy to guess:
1. "we" do not know whether the CVR&SSFDR are within the wreckage or not;
2. if not--> end of the story
3. if yes : are they readable? Y or N
4. if Y ....
5. if N, go back to 2.

In any case, the BEA, officials, airline and AIB has an escape door to save, not only their face but also DZE BUSINESS.
Because this world is talking and doing business

What about the bodies? The remaining families? Who cares? and this is most likely the most important.
aston09 is offline  
Old 5th Apr 2011, 23:26
  #53 (permalink)  
 
Join Date: Mar 2009
Location: Perth Western Australia
Age: 57
Posts: 808
Likes: 0
Received 0 Likes on 0 Posts
and few other parts of my anatomy
You do know you can get creams and powders for that problem!
rh200 is offline  
Old 6th Apr 2011, 00:29
  #54 (permalink)  
 
Join Date: Jun 2009
Location: Newcastle
Age: 53
Posts: 613
Received 1 Like on 1 Post
The job of the submarine is to LISTEN, with its sophisticated listenning device, any sound in a wide sound spectrum.
If you have time and away from this thread i will give you lessons on accoustics and how sound tends to bend (i.e. refraction) as it passes through the thermoclines and tends to produce "shadow zones" above and below the angle of the sound.
MATELO is offline  
Old 6th Apr 2011, 01:32
  #55 (permalink)  
 
Join Date: Aug 2004
Location: Corinth,Texas
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
Why is gear extended?

From the photos, it certainly appears that the landing gear is extended. Any ideas why that would be? Years ago, a 727 in an uncontrollable dive, the crew lowered the gear to slow down and were able to successfully recover from the dive.

jj
jjeppson is offline  
Old 6th Apr 2011, 04:06
  #56 (permalink)  
 
Join Date: Apr 2011
Location: California
Age: 63
Posts: 37
Likes: 0
Received 0 Likes on 0 Posts
Why keep searching?

They renewed the search because they were named in a civil lawsuit and are trying to find evidence that will prove they were not negligent in ways that contributed to the accident. I would say some degree of cynicism is warranted, however, with so many people involved (Woods Hole Institute) I don't think you can really keep the wraps on things. Now if you believe the Apollo moon landing was a hoax ...
techgeek is offline  
Old 6th Apr 2011, 06:26
  #57 (permalink)  
 
Join Date: Aug 2009
Location: Germany
Age: 67
Posts: 1,777
Likes: 0
Received 0 Likes on 0 Posts
Cool

Hi,

They renewed the search because they were named in a civil lawsuit and are trying to find evidence that will prove they were not negligent in ways that contributed to the accident
You are completely wrong .. or you have a hidden agenda or you are misinformed
The researches phase 4 was decided months ago and certainly with some pressure from the family associations
The lawsuites were made after the decision of phase 4
jcjeant is offline  
Old 6th Apr 2011, 08:16
  #58 (permalink)  
 
Join Date: Dec 2001
Location: England
Posts: 1,389
Likes: 0
Received 0 Likes on 0 Posts
The job of the submarine is to LISTEN, with its sophisticated listenning device, any sound in a wide sound spectrum.
Actually no. Noise is proportional to bandwidth so listening for any sound in a "wide spectrum" is exactly what you shouldn't do. If you know the frequency of the transmitter you should optimise your reciever to that narrow band.
cwatters is offline  
Old 6th Apr 2011, 08:27
  #59 (permalink)  
 
Join Date: Apr 2009
Location: Melbourne, Australia
Age: 40
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Why are there two threads on here now with the same topic?

Can mods please merge this with the main 'Search Resumes' thread. It's pointless having both.
Bobman84 is offline  
Old 6th Apr 2011, 08:41
  #60 (permalink)  
PFR
Gamekeeper
 
Join Date: Aug 2000
Location: South East
Age: 61
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts
Arrow

Seconded - that's where the most informed discussion is taking place IMHO.
PFR is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.