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Forum: Tech Log

1st Jul 2011, 09:30

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

Re A340 airprox zoom climb @Grity ...

Re A340 airprox zoom climb

@Grity

Thanks for the update - I started on a more detailed digitization of the graphs (there are shareware/opensource tools) - but didn't get too far! Your plots do...

Forum: Tech Log

30th Jun 2011, 16:08

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

@grity Congratulations at reverse...

@grity

Congratulations at reverse engineering that FDR data, I guess there's no chance of a FOI request for the actual data after all this time - along the lines the 9/11 data some of which is...

Forum: Tech Log

30th Jun 2011, 00:37

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

Peter H There is a bit more info in the...

Peter H

There is a bit more info in the design specification of Airbus pitot tubes systems in the ATSB Guam report AO-2009-065 (involving the preferred Goodrich probe).

but again it just...

Forum: Tech Log

29th Jun 2011, 17:45

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

Rhetorical question I guess but altitude also...

Rhetorical question I guess but altitude also rose above 'the maximum cruising level displayed on the Flight Management and Guidance System (FMGS)' = FL360+1000ft. So I believe the aircraft was...

Forum: Tech Log

29th Jun 2011, 09:49

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

Not sure I'd call it 'stable', but it is 'flying'...

Not sure I'd call it 'stable', but it is 'flying' below 'stall speed'.

Note 'they' is not pilot input, elevator input may be from Normal law controlling 1g, but is also almost coincident with the...

Forum: Tech Log

28th Jun 2011, 12:33

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

If we are still discussing the A340 airprox the...

If we are still discussing the A340 airprox the only explanation I have is that with A/P off due to overspeed, so flight control in Normal mode, engines put to idle by pilot action to stop the engine...

Forum: Tech Log

28th Jun 2011, 08:59

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

So the A-310 didn't use this same AoA stall...

So the A-310 didn't use this same AoA stall definition philosophy?

Technically a stall is about airfoils and peak lift AoA, and in a complex wing shape as the A330 this will not be a sudden...

Forum: Tech Log

27th Jun 2011, 09:11

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

As we all now know from earlier posts, no such...

As we all now know from earlier posts, no such thing as "stall speed" its all about AoA. The A340 clearly went into a 'ballistic trajectory" too slow to maintain level flight at that altitude even...

Forum: Tech Log

25th Jun 2011, 15:17

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

Note this report was discussed on these forums as...

Note this report was discussed on these forums as soon as the crash site located - the 'zoom-climb' to loose speed and stall from height being the simplest explanation Mr Occam could suggest. But...

Forum: Tech Log

25th Jun 2011, 09:37

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

@PickyPerkins...

@PickyPerkins (http://www.pprune.org/members/54143-pickyperkins)

Worth noting that AF447 is an outlier on that table in terms of full incident duration ~4mins 23 seconds which equates to 8,000...

Forum: Tech Log

23rd Jun 2011, 22:17

Replies: 1,069

AF 447 Thread no. 4

Views: 280,412

Posted By sensor_validation

same thing as that 2000 A340 AIRPROX?

same thing as that 2000 A340 AIRPROX?

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