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Search: Posts Made By: sensor_validation
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Forum: Tech Log
15th Jun 2011, 16:15
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@HazelNuts39...

@HazelNuts39 (http://www.pprune.org/members/305001-hazelnuts39) re http://www.pprune.org/tech-log/452836-af447-thread-no-3-a-103.html#post6515113

Is it possible to deduce from your great graphs at...
Forum: Tech Log
13th Jun 2011, 22:46
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Its the speed that would give same dynamic...

Its the speed that would give same dynamic pressure at standard air density (sea level) - useful because its basically what the wings use to generate lift, independent of altitude Its also...
Forum: Tech Log
13th Jun 2011, 09:00
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Just to point out there would be no visible...

Just to point out there would be no visible increase in indicated speed if common drain blockage gradual and indicated speed is under auto control. And Mach 0.8 @ FL350 @ ISA +10 is closer to 272...
Forum: Tech Log
11th Jun 2011, 10:13
Replies: 2,070
Views: 613,492
Posted By sensor_validation

bear - do take another look at the A340 AIRPROX...

bear - do take another look at the A340 AIRPROX zoom-climb Appendix B FDR plots, there is a 10 second lag between pitch up and establishment of climb. There's even a hint of the classic "non-minimum...
Forum: Tech Log
8th Jun 2011, 19:43
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Note that the BEA report states the indicated...

Note that the BEA report states the indicated airspeeds in the initial problem "fell to 60kt". It appears that the control system does this so that any protection that may be disabled if <60kt are...
Forum: Tech Log
5th Jun 2011, 22:33
Replies: 2,070
Views: 613,492
Posted By sensor_validation

A good reference on this, which has been posted...

A good reference on this, which has been posted here before :-
http://airs-icing.org/AIRS_II/AIAAReno2006/AIAA-2006-206-739.pdf




Err yes, but the Thales AA probe in use was known to be...
Forum: Tech Log
4th Jun 2011, 12:39
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@auraflyer My reading of the BEA document is...

@auraflyer

My reading of the BEA document is that at least 2 out of 3 Pitot tubes were actually working correctly just before the real stall, but wouldn't have been trusted. We don't know what...
Forum: Tech Log
3rd Jun 2011, 10:18
Replies: 2,070
Views: 613,492
Posted By sensor_validation

I can't find for sure what AoA probe was actually...

I can't find for sure what AoA probe was actually fitted to the AF447, but a likely candidate is a Thales C16291AA which has a catalog range of +/- 60 degrees - but this "Local Angle of Attack" gets...
Forum: Tech Log
3rd Jun 2011, 08:57
Replies: 2,070
Views: 613,492
Posted By sensor_validation

What about windspeed? Pedantic maybe, but...

What about windspeed?

Pedantic maybe, but 140KTAS or 140KCAS. If the pitots only observe the normal component they may only report an "unbelievable" 70KIAS. With wind and sidelip it is easy to...
Forum: Tech Log
2nd Jun 2011, 16:06
Replies: 2,070
Views: 613,492
Posted By sensor_validation

I know its been discussed before - and was one...

I know its been discussed before - and was one theory proposed by BBC/Nova - but would the speed change from M0.82 to M0.80 have been complete before the UAS? If pitot drains simultaneously block...
Forum: Tech Log
1st Jun 2011, 18:28
Replies: 2,070
Views: 613,492
Posted By sensor_validation

And what makes you think the French BEA chief...

And what makes you think the French BEA chief spoke to these two Americans? They did have help from 3 staff in Paris that is closer to the BEA offices - but the article also contains other...
Forum: Tech Log
1st Jun 2011, 15:49
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Where/when? We'd all like to read about...

Where/when? We'd all like to read about everything he said!
Forum: Tech Log
1st Jun 2011, 14:11
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@Blujet, takata et al. With respect to who...

@Blujet, takata et al.

With respect to who was flying from where do you now challenge the previous 'agreement' between PJ2 and Lemurian summarized in this old post?
...
Forum: Tech Log
1st Jun 2011, 13:14
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@tubby And the French BEA now put out...

@tubby

And the French BEA now put out official releases via a reporter based in London?
Forum: Tech Log
1st Jun 2011, 12:49
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@MartinM I'm with takata all the way - are...

@MartinM

I'm with takata all the way - are we reading the same document?
Forum: Tech Log
1st Jun 2011, 12:05
Replies: 2,070
Views: 613,492
Posted By sensor_validation

I don't see this statement from BEA - not even...

I don't see this statement from BEA - not even from an alleged "source close to the investigation". About as reliable as the media reports who was PF in which seat? The BEA report states that the...
Forum: Tech Log
1st Jun 2011, 09:58
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Can you recreate the 2000 A340 airprox zoom climb...

Can you recreate the 2000 A340 airprox zoom climb from FL360 to FL384 at up to 6,000 ft/min ?
Forum: Tech Log
31st May 2011, 16:32
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Highlights lots of gaps we haven't been told...

Highlights lots of gaps we haven't been told about - but plotting ACARS messages at receipt time only shows when aircraft attitude able to communicate with satellite - not when they were generated.
Forum: Tech Log
31st May 2011, 14:04
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Hi takata, As discussed earlier, there was...

Hi takata,

As discussed earlier, there was no fault found with the controls at the time, the issue investigated was the near-miss. What is clear is that the pitch up in the A340 was after A/P and...
Forum: Tech Log
31st May 2011, 11:40
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@10,000 ft/min I don't think any correction to...

@10,000 ft/min I don't think any correction to text required! But sure any indication will be unsteady and oscillating depending on which port in use pointing which way and how in detail they are...
Forum: Tech Log
31st May 2011, 09:17
Replies: 2,070
Views: 613,492
Posted By sensor_validation

That 60 kts again --- why would a blocked pitot...

That 60 kts again --- why would a blocked pitot and open drain stick at this value? It seems to me that the IAS system outputs 60 kts (or is it 60.001?) when UAS detected, so that...
Forum: Tech Log
31st May 2011, 08:36
Replies: 2,070
Views: 613,492
Posted By sensor_validation

@bekolblockage...

@bekolblockage (http://www.pprune.org/members/46953-bekolblockage)

You have to go back more than 43 pages! The ballistic zoom-climb trajectory demonstrated by the A340 was suggested as soon as...
Forum: Tech Log
30th May 2011, 23:53
Replies: 2,070
Views: 613,492
Posted By sensor_validation

For lots of detail on the AoA vanes see the...

For lots of detail on the AoA vanes see the Perpignan crash report. The vane may indeed generate a "local angle of attack" but "As the fuselage disturbs the flow of air, these measurements
have to...
Forum: Tech Log
30th May 2011, 23:34
Replies: 2,070
Views: 613,492
Posted By sensor_validation

The comment in the BEA statement which was...

The comment in the BEA statement which was translated into English as "the Captain attended the briefing between the two co-pilots" - maybe trying to read too much into the wording - would expect...
Forum: Tech Log
30th May 2011, 20:35
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Gotta go and read that ref now - but we are just...

Gotta go and read that ref now - but we are just given a glimpse into the mindset of the the BEA investigators who can't say what they are not certain about, or AF / AB could object to - but sure...
Forum: Tech Log
30th May 2011, 18:25
Replies: 2,070
Views: 613,492
Posted By sensor_validation

There may be more to come out on this - who took...

There may be more to come out on this - who took the controls in the last minute? An assumption made elsewhere is that it was the captain, presumably displacing the 2nd co-pilot PNF in the left seat.
Forum: Tech Log
30th May 2011, 16:52
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Don't shark's tend to dive when they fall out of...

Don't shark's tend to dive when they fall out of the sky?

http://www.headington.org.uk/pics_headington/pics_shark/shark_big.jpg

Headington, Oxford (http://www.headington.org.uk/shark/)
Forum: Tech Log
30th May 2011, 16:11
Replies: 2,070
Views: 613,492
Posted By sensor_validation

Interesting this is not yet clearly stated - I...

Interesting this is not yet clearly stated - I assumed the 2nd co-pilot was sleeping in the cockpit in the "Third occupant seat", where he would have been at take-off - or just an intercom call away....
Forum: Tech Log
30th May 2011, 10:36
Replies: 2,070
Views: 613,492
Posted By sensor_validation

BEAs statement is a careful selection of...

BEAs statement is a careful selection of established facts which must have been checked out carefully by legal opinion - so I think I think it is worth looking carefully at the words used - albeit...
Forum: Tech Log
29th May 2011, 18:09
Replies: 2,070
Views: 613,492
Posted By sensor_validation

There is such a device for measuring level in a...

There is such a device for measuring level in a tank - cheap and electrically 'intrinsically safe' known/marketted for nearly a 100 years as a Pneumercator. Basically you set a small bleed flow via...
Forum: Tech Log
28th May 2011, 23:20
Replies: 2,070
Views: 613,492
Posted By sensor_validation

More questions raised by the BEA report, probably...

More questions raised by the BEA report, probably impossible to answer with certainty I'm afraid

1. Would the speed reduction from M0.82 to M0.80 have been completed between 2:08 and 2:10? - if...
Showing results 1 to 31 of 31


 
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