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Search: Posts Made By: DJ77
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Forum: Tech Log
13th Jun 2011, 22:25
Replies: 2,070
Views: 612,192
Posted By DJ77

I’m afraid the incapacitated crew scenario would...

I’m afraid the incapacitated crew scenario would be a rather weak justification for keeping auto-trim in ALT law. MS FS players all have joysticks with “Hat switches” that can be used to change trim....
Forum: Tech Log
13th Jun 2011, 15:26
Replies: 2,070
Views: 612,192
Posted By DJ77

safetypee, re # 1918: In an ADC, the temperature,...

safetypee, re # 1918: In an ADC, the temperature, (TAT or SAT) is used to compute TAS from the sound speed and Mach number.
Forum: Tech Log
12th Jun 2011, 23:25
Replies: 2,070
Views: 612,192
Posted By DJ77

Gums, I suggest you have a look at this...

Gums,


I suggest you have a look at this interesting and well documented internet site you kindly gave us in one of your previous posts: "The Blackbird Archive". SR-71 Online - SR-71 Flight...
Forum: Tech Log
12th Jun 2011, 14:23
Replies: 2,070
Views: 612,192
Posted By DJ77

safetypee, Mach number calculation depends...

safetypee,

Mach number calculation depends only on impact pressure and static pressure. Possible TAT probe anomaly (due to icing) is no factor.
Forum: Tech Log
11th Jun 2011, 12:01
Replies: 2,070
Views: 612,192
Posted By DJ77

What Garage Years has been asking for a while now...

What Garage Years has been asking for a while now is the value of the critical AoA (AoAc) which is used by the confusers to trigger the stall alarm in ALT law when airspeed (including Mach number) is...
Forum: Tech Log
10th Jun 2011, 14:16
Replies: 2,070
Views: 612,192
Posted By DJ77

Extract from the ATSB report on A330 VH-EBA...

Extract from the ATSB report on A330 VH-EBA incident (28 October 2009) – Flight Guidance system description:


Note: ATSB always uses the past tense.

If this is correct, according to the BEA...
Forum: Tech Log
6th Jun 2011, 15:20
Replies: 2,070
Views: 612,192
Posted By DJ77

DW, you don't need to use that as an excuse:...

DW, you don't need to use that as an excuse: engineers did a very good job building the A320.

On the pilot side however, how deep "in the loop" or enthralled they were is questionable. They...
Forum: Tech Log
6th Jun 2011, 11:38
Replies: 2,070
Views: 612,192
Posted By DJ77

That lack is of course highly regrettable but I...

That lack is of course highly regrettable but I doubt AF has latitude to choose what is recorded, except on QAR.
Forum: Tech Log
4th Jun 2011, 22:59
Replies: 2,070
Views: 612,192
Posted By DJ77

It is not known if similar events (simultaneous...

It is not known if similar events (simultaneous multiple pitot icing) ever happened on other than recent Airbus types. These incidents are not always reported by operators but perhaps someone started...
Forum: Tech Log
4th Jun 2011, 15:00
Replies: 2,070
Views: 612,192
Posted By DJ77

HN39, That’s right. I figured the stall...

HN39,


That’s right. I figured the stall warning could also activate in normal law. Same reason probably for not having low speed longitudinal static stability in ALT law. Or am I missing...
Forum: Tech Log
4th Jun 2011, 09:13
Replies: 2,070
Views: 612,192
Posted By DJ77

Worst case is alarms that don't help. May I add...

Worst case is alarms that don't help.
May I add this to the debate:
14 CFR 25.207 (extract): "Once initiated, stall warning must continue until the angle of attack is reduced to approximately that...
Forum: Tech Log
3rd Jun 2011, 15:11
Replies: 2,070
Views: 612,192
Posted By DJ77

Citing FCOM 1.27.20 P2: “When angle of attack...

Citing FCOM 1.27.20 P2:
“When angle of attack protection is active, THS is limited between setting at entry in protection and 2° nose down (i.e. further nose up trim cannot be applied).”

This...
Forum: Tech Log
31st May 2011, 22:43
Replies: 2,070
Views: 612,192
Posted By DJ77

Takata, tks for pointing me to FCOM3

Takata, tks for pointing me to FCOM3
Forum: Tech Log
31st May 2011, 20:12
Replies: 2,070
Views: 612,192
Posted By DJ77

Takata, re the A340 AIRPROX, you wrote: ...

Takata, re the A340 AIRPROX, you wrote:


Hmm, the flight controls were in normal mode and no sidestick controller input was made until 28 sec. after AP diconnection when they were already a...
Forum: Tech Log
30th May 2011, 11:38
Replies: 2,070
Views: 612,192
Posted By DJ77

Except in the “New findings” part at the end, the...

Except in the “New findings” part at the end, the BEA update report is sliced into paragraphs that start with a time stamp. Each paragraph contains details like general configuration of the flight...
Forum: Tech Log
30th May 2011, 08:07
Replies: 2,070
Views: 612,192
Posted By DJ77

mm43, re VH-EBA UAS: The report states...

mm43, re VH-EBA UAS:


The report states that this short UAS event was due to pitot icing (impact pressure lost), not the static port.
Forum: Tech Log
29th May 2011, 22:40
Replies: 2,070
Views: 612,192
Posted By DJ77

TurbineD, in your post #596 you asked about...

TurbineD, in your post #596 you asked about possibile similarities betwwen AF447 and the airprox incident over North Atlantic (AAIB bulletin 6/2001).

Looking at appendix B of the report showing...
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