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Search: Posts Made By: rudderrudderrat
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Forum: Tech Log
30th Nov 2013, 16:05
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Er..... What do you think the autotrim is doing...

Er..... What do you think the autotrim is doing at high Mach numbers?
Why do you think the speed limit in Direct Law is .77Mach.
Forum: Tech Log
24th Nov 2013, 20:41
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Bpalmer, Nice description of IAS. CAS is...

Hi Bpalmer,
Nice description of IAS.
CAS is IAS corrected for instrument and position /installation errors.
Forum: Tech Log
23rd Nov 2013, 22:06
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi DozyWannabe, If you have a look at the...

Hi DozyWannabe,

If you have a look at the CVR transcript from page 23 onwards:
http://www.bea.aero/docspa/2009/f-cp090601.en/pdf/annexe.01.en.pdf you will see that the "C-chord" (Altitude Alert)...
Forum: Tech Log
23rd Nov 2013, 08:33
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi DW, If someone could please explain how...

Hi DW,

If someone could please explain how an A330 could ever have a CAS<60kts (at 1 g) whilst airborne - then I'll give up on this point.
If you are feeding "bad data" (intermittent / silent...
Forum: Tech Log
22nd Nov 2013, 17:07
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi HazelNuts39, 2 h 11 min 45 End of “Stall,...

Hi HazelNuts39,

2 h 11 min 45 End of “Stall, stall” warning + cricket.
2 h 11 min 53 SV : “Stall, stall” + incomplete cricket.
2 h 11 min 55 SV : “Stall, stall” + incomplete cricket.

If you...
Forum: Tech Log
22nd Nov 2013, 16:33
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi HazelNuts39, Furthermore ... "Time 2 h...

Hi HazelNuts39,

Furthermore ...
"Time 2 h 11 min 58 - The vertical speed is around -15,300 ft/min."
That's around 80 kts CAS vertically - is that enough for you?
Forum: Tech Log
22nd Nov 2013, 08:09
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi HazelNuts39, All aircraft have a device...

Hi HazelNuts39,

All aircraft have a device which measures rate of change of static pressure - it's called the Vertical Speed Indicator.
AF 447 had in excess of 10,000 ft per minute displayed...
Forum: Tech Log
16th Nov 2013, 18:03
Replies: 976
Views: 217,225
Posted By rudderrudderrat

How long can you maintain FL 410 at less than 1...

How long can you maintain FL 410 at less than 1 g?

Even though the speed sensor is in error?
Brilliant logic! Best not tell the crew they are stalled then.
Forum: Tech Log
16th Nov 2013, 17:13
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Thanks for that HazelNuts39. I didn't know...

Thanks for that HazelNuts39.
I didn't know that an A330 was capable of flying with an IAS <60 kts.
Forum: Tech Log
16th Nov 2013, 16:31
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Chris Scott, I completely agree. So why...

Hi Chris Scott,

I completely agree. So why would you want to turn off the stall warning when stalled like that?
The 60 kt logic is to prevent false warnings on the ground when the AoA vanes...
Forum: Tech Log
16th Nov 2013, 09:05
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi BOAC, Unfortunately, I don't think so as...

Hi BOAC,

Unfortunately, I don't think so as this is his 16th attempt (according to his count.)
It will just be another page of copy and paste of random parts of incomplete quotes.
Forum: Tech Log
16th Nov 2013, 08:47
Replies: 976
Views: 217,225
Posted By rudderrudderrat

The pitots don't measure the angle of attack! ...

The pitots don't measure the angle of attack!
Itr's the AoA vanes which swivel.
Forum: Tech Log
6th Nov 2013, 15:49
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi BOAC, I think you are misreading minutes...

Hi BOAC,
I think you are misreading minutes instead of seconds.

"At 1 h 00 min 27 (point n°2), ......., the PNF manually disengaged the AP by pressing the
takeover pushbutton on the...
Forum: Tech Log
31st Oct 2013, 16:13
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Gums, I believe Alpha Floor was triggered...

Hi Gums,

I believe Alpha Floor was triggered (at a certain Alpha threshold). The thrust goes to TOGA power despite the TLs being somewhere else. With no side stick input, the aircraft will then...
Forum: Tech Log
27th Oct 2013, 07:58
Replies: 976
Views: 217,225
Posted By rudderrudderrat

extra text

Villas,

With UAS, the aircraft was in ALT LAW.
Please explain why you think the aircraft was able to maintain wings level/bank.
What is the advantage of auto-trim of the stabiliser during UAS?...
Forum: Tech Log
26th Oct 2013, 10:44
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Not necessarily. e.g. On a parallel taxiway to...

Not necessarily. e.g. On a parallel taxiway to the runway, whilst heading towards the holding point in a stiff breeze will cause the vanes to align 180 degs away from zero. Hence the need for the 60...
Forum: Tech Log
26th Oct 2013, 09:44
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Owain Glyndwr, I agree. Unfortunately no...

Hi Owain Glyndwr,

I agree. Unfortunately no one has yet designed a system which never fails.


No.
As you so eloquently explain in your earlier post despite "the aircraft never got below...
Forum: Tech Log
26th Oct 2013, 08:34
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Owain Glyndwr, Thanks for your...

Hi Owain Glyndwr,

Thanks for your explanation of the present rules CS 25.

The reason for 30 or 60 kts logic is to prevent nuisance stall warnings whist on the ground due to the vanes being...
Forum: Tech Log
25th Oct 2013, 09:06
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Clandestino, Please explain why you...

Hi Clandestino,

Please explain why you dismiss, for the 15th time at least, a vertical descent rate of 10,000 ft per minute (about 100 kts) does not qualify as a valid speed for angle of attack...
Forum: Tech Log
23rd Oct 2013, 06:42
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi DW, Correct. However some some crews...

Hi DW,

Correct.
However some some crews move their seats after take off into a more "comfortable" position. This places their hand and arm in a completely different position relative to the side...
Forum: Tech Log
18th Jun 2013, 16:42
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi awblain, Exactly. Since they didn't...

Hi awblain,

Exactly.

Since they didn't change the power initially (thrust lock), then I suggest the deceleration was masked by the increased pitch attitude.

Any short term vertical...
Forum: Tech Log
18th Jun 2013, 15:07
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi Barkingmad & awblain, It is impossible...

Hi Barkingmad & awblain,

It is impossible for the human brain to distinguish between linear inertial acceleration (or deceleration) from a pitch change. We need a natural horizon or an ADI/PFD to...
Forum: Tech Log
16th Jun 2013, 14:37
Replies: 976
Views: 217,225
Posted By rudderrudderrat

Hi BOAC, I think he was mistakenly...

Hi BOAC,

I think he was mistakenly performing this following procedure.

"Airborne, initial climb or landing
THR LEVERS AT TOGA SET OR CONFIRM
AP (if engaged) KEEP
SRS ORDERS FOLLOW
If...
Showing results 1 to 23 of 23


 
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