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Search: Posts Made By: sensor_validation
Showing results 1 to 35 of 134
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Forum: Accidents and Close Calls
26th Jan 2024, 10:18
Replies: 1,950
Views: 932,443
Posted By sensor_validation

Car stub axle bolts, need torque to seat...

Car stub axle bolts, need torque to seat bearings/seals but may have to back off a bit to get pin in?
Forum: Rotorheads
31st Oct 2017, 17:26
Replies: 2
Views: 2,233
Posted By sensor_validation

Low flying Pumas in Oxford UK

So there was a reason I saw a pair of low flying 'copters today, someone had clearly given them road based map directions - take the "A4144 Woodstock Road" North from the centre of Oxford, maybe they...
Forum: Rumours & News
12th Apr 2017, 12:07
Replies: 1,166
Views: 451,815
Posted By sensor_validation

Is the thread title correct? IANAL and this...

Is the thread title correct? IANAL and this incident was clearly post-boarding, and not even over-booking as it was clearly a late commercial decision to relocate crew. The Ts and Cs about being...
Forum: Private Flying
6th Jan 2017, 10:04
Replies: 9
Views: 1,602
Posted By sensor_validation

Or ask the police to point their camera away from...

Or ask the police to point their camera away from Oxford?

Helicopter pilots capture stunning aerial images of Oxford (From The Oxford Times)...
Forum: Rumours & News
18th Dec 2015, 09:11
Replies: 73
Views: 76,132
Posted By sensor_validation

I remember this happening at British Aerospace...

I remember this happening at British Aerospace Hatfield in 1980s, mentioned here before

http://www.pprune.org/engineers-technicians/137674-engineer-sucked-into-737-700-engine.html...
Forum: Rotorheads
10th Dec 2015, 13:58
Replies: 3
Views: 1,837
Posted By sensor_validation

Suggest you contact Brilliant Stuff...

Suggest you contact Brilliant Stuff (http://www.pprune.org/members/20484-brilliant-stuff) for templates and tips see also

http://www.pprune.org/rotorheads/569893-november-2015-desktop-calendar.html
Forum: Tech Log
6th Jul 2012, 08:56
Replies: 1,454
Views: 253,609
Posted By sensor_validation

Quote: Is 60 kt really too low cut-out for...

Quote:
Is 60 kt really too low cut-out for widebody?



As discussed at length before it is 60kt 'apparent airspeed' derived from pitot tubes which will all be significantly under-reading at...
Forum: Tech Log
5th Jul 2012, 16:06
Replies: 1,454
Views: 253,609
Posted By sensor_validation

It's a very well written report, only typo I...

It's a very well written report, only typo I noticed in the English version was on bottom of P151 "mark range" should be "Mach range".

Sad, so sad.
Forum: Tech Log
4th Nov 2011, 09:44
Replies: 1,688
Views: 407,356
Posted By sensor_validation

@Flight Instructor Stall (flight) - Wikipedia,...

@Flight Instructor
Stall (flight) - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Stall_(flight)#Deep_stall)
Forum: Tech Log
3rd Nov 2011, 21:32
Replies: 1,688
Views: 407,356
Posted By sensor_validation

I have seen this mentioned before, and I could...

I have seen this mentioned before, and I could design an auto-trim function that had this undesired behaviour - which shows same symptoms as classical "integral wind-up". If the controller doesn't...
Forum: Tech Log
29th Oct 2011, 14:27
Replies: 1,688
Views: 407,356
Posted By sensor_validation

Stability and Control at high AoA and post stall

Bit off-topic but related to discussion on stability and control of transport aircraft - have recently seen presentations and videos related to recent research between NASA and University of...
Forum: Tech Log
12th Aug 2011, 17:16
Replies: 1,998
Views: 511,699
Posted By sensor_validation

Lots of info on AoA sensors and processing for...

Lots of info on AoA sensors and processing for the Perpignan A320 in the BEA report, assume similar for the A330

for example
Forum: Tech Log
12th Aug 2011, 08:16
Replies: 1,998
Views: 511,699
Posted By sensor_validation

It's not as simple as that - what AoA inst were...

It's not as simple as that - what AoA inst were involved in the Perpignan crash?

Ans:



Thales make a lot of great kit and and its used extensively throughout many aircraft flight control...
Forum: Tech Log
11th Aug 2011, 23:29
Replies: 1,998
Views: 511,699
Posted By sensor_validation

Back to old obsession:- what exactly was...

Back to old obsession:- what exactly was happening just before the incident started - were the controls acting on bad data? I think its possible but only for a few seconds before the air data...
Forum: Tech Log
8th Aug 2011, 23:34
Replies: 1,998
Views: 511,699
Posted By sensor_validation

Has it been confirmed what AoA sensors were...

Has it been confirmed what AoA sensors were fitted?

Pretty likely the Thales C16291AA given the choice of Pitot tube, if so one could have been suffering an extreme variation of the known fault at...
Forum: Tech Log
29th Jul 2011, 22:45
Replies: 1,998
Views: 511,699
Posted By sensor_validation

p110 - the 'TEMPERATURE STATIQUE' is also clearly...

p110 - the 'TEMPERATURE STATIQUE' is also clearly affected by ice at same time as the speeds - temp rises to 0 as ice melting - so what about the super-cooled ice theory again - and could it have...
Forum: Tech Log
29th Jul 2011, 14:57
Replies: 1,998
Views: 511,699
Posted By sensor_validation

What about this document? ...

What about this document?

http://www.bea.aero/docspa/2009/f-cp090601e3/pdf/f-cp090601e3.pdf
Forum: Tech Log
29th Jul 2011, 11:45
Replies: 1,998
Views: 511,699
Posted By sensor_validation

From the recommendations re image recording of...

From the recommendations re image recording of the instrument displays:-

Are they suggesting a possible explanation is that the displays were not showing the same information as that recorded?
Forum: Tech Log
26th Jul 2011, 19:13
Replies: 1,998
Views: 511,699
Posted By sensor_validation

Pitch up of course, but what was the thrust...

Pitch up of course, but what was the thrust setting before increase - 90+%? So the converse, throttling back the engines to flight-idle, which was tried later should have a more dramatic effect in...
Forum: Tech Log
26th Jul 2011, 10:52
Replies: 1,998
Views: 511,699
Posted By sensor_validation

You need to keep your reference axes the same,...

You need to keep your reference axes the same, moving at the same constant initial velocity then there is no change in Kinetic energy - but OK "v" is no longer airspeed, if windspeed changes.
...
Forum: Tech Log
25th Jul 2011, 12:21
Replies: 1,998
Views: 511,699
Posted By sensor_validation

@Dutch M I politely suggest you go a read...

@Dutch M

I politely suggest you go a read the Wikipedia article on Kinetic Energy. It is correct to use the airmass as reference and airspeed to calculate the KE relative to the axes (its not an...
Forum: Tech Log
1st Jul 2011, 09:30
Replies: 1,069
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
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
Views: 281,215
Posted By sensor_validation

same thing as that 2000 A340 AIRPROX?

same thing as that 2000 A340 AIRPROX?
Forum: Tech Log
15th Jun 2011, 16:15
Replies: 2,070
Views: 615,429
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: 615,429
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: 615,429
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...
Showing results 1 to 35 of 134
 
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