PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
 
Page 1 of 2
1
2
Search: Posts Made By: Machinbird
Showing results 1 to 35 of 53
Search took 0.00 seconds.
Forum: Tech Log
4th Nov 2011, 03:29
Replies: 1,688
Views: 407,664
Posted By Machinbird

Clandestino The control power of the THS...

Clandestino
The control power of the THS is not what we are interested in so much as the effect of trimming all the way up to the stall. Test pilots avoid doing this for good reasons.
It is...
Forum: Tech Log
3rd Nov 2011, 05:37
Replies: 1,688
Views: 407,664
Posted By Machinbird

Organ guy, since I'm still awake, the answers are...

Organ guy, since I'm still awake, the answers are simple once you understand the principles:

TOGA is counterproductive in a stall. The low thrust line of the engines relative to the cg forces the...
Forum: Tech Log
2nd Nov 2011, 22:50
Replies: 1,688
Views: 407,664
Posted By Machinbird

Clandestino, that wasn't a pitch attitude, it was...

Clandestino, that wasn't a pitch attitude, it was a trim setting. Sorry if I wasn't clear.:O

I think my point is that the higher trim settings are rarely used unless the cg is way forward and the...
Forum: Tech Log
2nd Nov 2011, 21:29
Replies: 1,688
Views: 407,664
Posted By Machinbird

OK465 3rd BEA report Not really disagreeing,...

OK465
3rd BEA report
Not really disagreeing, but I believe the application of thrust at that point finished the job of taking the aircraft out of the envelope. They would likely have been able to...
Forum: Tech Log
2nd Nov 2011, 18:28
Replies: 1,688
Views: 407,664
Posted By Machinbird

Dozy, Why would you be holding a control back...

Dozy,
Why would you be holding a control back for that length of time. It is because the aircraft was not performing the commanded action (It couldn't).
It may be a natural human instinct...
Forum: Tech Log
2nd Nov 2011, 17:36
Replies: 1,688
Views: 407,664
Posted By Machinbird

Clandestino, As a line pilot, you are not...

Clandestino, As a line pilot, you are not supposed to be taking your aircraft to any points in the envelope the test pilots have not already demonstrated. That is part of what certification is all...
Forum: Tech Log
2nd Nov 2011, 14:49
Replies: 1,688
Views: 407,664
Posted By Machinbird

Clandestino I don't know much time you have in...

Clandestino
I don't know much time you have in tactical jets, but you have enough chutzpah to have come to aviation that way. This is not a criticism by the way.

The performance of the...
Forum: Tech Log
2nd Nov 2011, 01:52
Replies: 1,688
Views: 407,664
Posted By Machinbird

To summarize Perpignan: Perpignan accident was...

To summarize Perpignan:
Perpignan accident was enabled when two AOA sensors froze at a low angle of attack while at altitude due to water intrusion. Crew later attempted to demonstrate activation...
Forum: Tech Log
1st Nov 2011, 14:30
Replies: 1,688
Views: 407,664
Posted By Machinbird

I'm disappointed that no one commented on this...

I'm disappointed that no one commented on this comment! Goes back to the earlier link posted relative to the pull reflex.
When the wings rock, you have to reduce AOA if you want to be in ...
Forum: Tech Log
1st Nov 2011, 04:13
Replies: 1,688
Views: 407,664
Posted By Machinbird

Those who think yokes should be the cure-all for...

Those who think yokes should be the cure-all for what the other guy is doing should look at this accident originally posted by Netstruggler in the current Rumors & News AF447 thread....
Forum: Tech Log
31st Oct 2011, 17:35
Replies: 1,688
Views: 407,664
Posted By Machinbird

Dozy Nope Dozy. In Normal Law it stops...

Dozy
Nope Dozy. In Normal Law it stops trimming at the V alpha protect if I remember correctly, but in ALT 2 it keeps on cranking away if airspeed is invalid until it hits the stops (or nearly so)...
Forum: Tech Log
31st Oct 2011, 16:17
Replies: 1,688
Views: 407,664
Posted By Machinbird

Relax BOAC. I changed 'trimming' to...

Relax BOAC.
I changed 'trimming' to 'autotrimming' to make it clear the type of trim we are referring to.
Do you really want your trim system quietly doing things behind your back? (Actually out...
Forum: Tech Log
31st Oct 2011, 14:40
Replies: 1,688
Views: 407,664
Posted By Machinbird

Dozy, I'd bet the test pilots never stalled the...

Dozy, I'd bet the test pilots never stalled the bus with full nose up trim. If so, that is not a certified condition. The only way the system would then be allowed to achieve that condition would...
Forum: Tech Log
31st Oct 2011, 06:52
Replies: 1,688
Views: 407,664
Posted By Machinbird

Quote: Originally Posted by CONF iture...

Quote:
Originally Posted by CONF iture http://images.ibsrv.net/ibsrv/res/src:www.pprune.org/get/images/buttons/viewpost.gif...
Forum: Tech Log
30th Oct 2011, 14:25
Replies: 1,688
Views: 407,664
Posted By Machinbird

BOAC, Been there, avoided the temptation to...

BOAC,
Been there, avoided the temptation to pull right back. Still here to pester you.:}

It may not just be ground proximity that triggers the pull reflex. Think about some of the accidents you...
Forum: Tech Log
30th Oct 2011, 01:18
Replies: 1,688
Views: 407,664
Posted By Machinbird

I have been reading something on AOPA online that...

I have been reading something on AOPA online that may relate to what the PF on AF447 experienced.
AOPA Online: Technique: The 'Panic Pull'...
Forum: Tech Log
25th Oct 2011, 02:11
Replies: 1,688
Views: 407,664
Posted By Machinbird

TTex600, I could be wrong, but what I think you...

TTex600, I could be wrong, but what I think you are perceiving is the time lag in your perceive-act cycle. An aircraft like the MD-80, you see the slightest of movement and you apply the slightest...
Forum: Tech Log
20th Oct 2011, 23:42
Replies: 1,688
Views: 407,664
Posted By Machinbird

Christiaan Probably not Christiaan. The...

Christiaan
Probably not Christiaan. The trusting souls who don't bother to cross check their instrument readings definitely won't need one. The ones who have never been taught how to use one are...
Forum: Tech Log
9th Oct 2011, 19:36
Replies: 1,688
Views: 407,664
Posted By Machinbird

And having given the hamsterwheel another spin,...

And having given the hamsterwheel another spin, Clandestino goes off snickering down his sleeve.
Welcome back to the hamsterwheel Clandestino, did you miss your old friends?:}
Forum: Tech Log
9th Oct 2011, 03:18
Replies: 1,688
Views: 407,664
Posted By Machinbird

Confiture, your graph of V/S commanded vs V/S...

Confiture, your graph of V/S commanded vs V/S actual is missing time marks. Looks like the selector for V/S was misbehaving. What is the source of this graph?
Forum: Tech Log
9th Oct 2011, 01:07
Replies: 1,688
Views: 407,664
Posted By Machinbird

Lyman As I read this, the...

Lyman




As I read this, the adrenalin flowing from each of the guys sitting in the cockpit was enough to override their ability to evaluate their surroundings.
3 seconds of speed brake is...
Forum: Tech Log
8th Oct 2011, 03:35
Replies: 1,688
Views: 407,664
Posted By Machinbird

The crew of AF447 briefly had the Speed brakes...

The crew of AF447 briefly had the Speed brakes out.
If fast, they should have been thrown forward. They obviously felt next to nothing.
Their thoughts were unable to focus on this deviation...
Forum: Tech Log
3rd Oct 2011, 03:44
Replies: 1,688
Views: 407,664
Posted By Machinbird

OC OC, There are several levels of knowing...

OC

OC, There are several levels of knowing your machine. Because I was mechanically inclined, I got into the maintenance manuals and knew my machines better than most, but that was not a 100%...
Forum: Tech Log
3rd Oct 2011, 01:28
Replies: 1,688
Views: 407,664
Posted By Machinbird

It is simply logical considering the mechanics of...

It is simply logical considering the mechanics of the situation. The aircraft in pitch is effectively bar on a pivot (a seesaw if you will). The THS additional incidence had the effect of applying...
Forum: Tech Log
2nd Oct 2011, 22:14
Replies: 1,688
Views: 407,664
Posted By Machinbird

Dozy What ran the trim up at the stall was the...

Dozy
What ran the trim up at the stall was the Airbus trying to effectively hold an attitude and being unable to do so without adding more THS trim.

Who really knows why the PF decided the nose...
Forum: Tech Log
17th Sep 2011, 00:54
Replies: 1,688
Views: 407,664
Posted By Machinbird

Clandestino You must have missed the post where...

Clandestino
You must have missed the post where I stated I had personally tested an actual airline (In this case DC-9) AOA transmitter and that it came alive at 15-20 mph based on my vehicle's...
Forum: Tech Log
13th Sep 2011, 01:36
Replies: 1,688
Views: 407,664
Posted By Machinbird

Clandestino. This is all very irrelevant to the...

Clandestino. This is all very irrelevant to the accuracy of the AOA vane as far as being useful. The AOA transmitters only send out an angular measurement. Nothing that is rocket science.

If...
Forum: Tech Log
11th Sep 2011, 02:26
Replies: 1,688
Views: 407,664
Posted By Machinbird

Dozy, you are overthinking this. Dozy,...

Dozy, you are overthinking this.


Dozy, we are not flying with the first design of Airbus 330 control laws nor even the second.

The software design is a work in process.

Airbus has an...
Forum: Tech Log
10th Sep 2011, 18:40
Replies: 1,688
Views: 407,664
Posted By Machinbird

Dozy, You are overthinking this. The engineers...

Dozy, You are overthinking this. The engineers are going to have to get involved and chase down all the new logic branches and implications.

They started with a bad premise the first time. That...
Forum: Tech Log
10th Sep 2011, 15:59
Replies: 1,688
Views: 407,664
Posted By Machinbird

Heck no! All you need is a bit of ballistic...

Heck no! All you need is a bit of ballistic trajectory and any value is possible.
Any AOA sensor that requires 60 knots to read local airflow direction should be trashed. That criterea is way too...
Forum: Tech Log
9th Sep 2011, 01:24
Replies: 1,688
Views: 407,664
Posted By Machinbird

Simple. 0200 mindfog, automation...

Simple.
0200 mindfog, automation overdependence and atrophied/inadequate emergency skills resulting in failure to see the forest for the trees.

A competent pilot, faced with an emergency, should...
Forum: Tech Log
7th Sep 2011, 14:42
Replies: 1,688
Views: 407,664
Posted By Machinbird

Yes, even while sitting in an ejection seat.:(

Yes, even while sitting in an ejection seat.:(
Forum: Tech Log
7th Sep 2011, 06:44
Replies: 1,688
Views: 407,664
Posted By Machinbird

Hi Clandestino, I see you are an equal...

Hi Clandestino, I see you are an equal opportunity commentor.
My experience with the rudder pedal shaker was that it was pretty vigorous and if such a shaker were to be bolted into a FBW control...
Forum: Tech Log
6th Sep 2011, 05:08
Replies: 1,688
Views: 407,664
Posted By Machinbird

Mad Scientist Do you really think you...

Mad Scientist


Do you really think you can shake the short Airbus stick sufficiently to draw attention without also making control inputs?
And what if the pilot is not holding onto the stick...
Forum: Tech Log
5th Sep 2011, 23:49
Replies: 1,688
Views: 407,664
Posted By Machinbird

In other words: Has some phase of the training...

In other words: Has some phase of the training de-sensitized the crews from hearing and responding to the stall alarm? Do Sim instructors debrief items while the stall alarm is sounding? Have crews...
Showing results 1 to 35 of 53
 
Page 1 of 2
1
2


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.