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Search: Posts Made By: Bpalmer
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Forum: Questions
23rd Oct 2023, 18:29
Replies: 18
Views: 8,180
Posted By Bpalmer

787 and A350 almost do

The 787 and A350 both have cruise flap functions that will -without pilot intervention or action - adjust the flaps in flight to optimize performance. Earlier models (A330) moved fuel to adjust the...
Forum: Tech Log
13th Jan 2015, 03:21
Replies: 1,677
Views: 527,382
Posted By Bpalmer

"Qualified Glider Pilot"

Unfortunately, we don't know much, if anything, about his glider qualifications. We don't know if he took a weekend glider transition course or had 1000 hours.

As a glider pilot myself (and A330...
Forum: Tech Log
19th Dec 2014, 07:01
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Alternate Law Landing A330

Alternate law transitioning to Direct at gear down is an A320 not A330

Alternate law pitch control is similar to normal law. Alternate law has maneuver protection, automatic pitch trim, and ground...
Forum: Tech Log
20th Oct 2014, 16:38
Replies: 14
Views: 3,244
Posted By Bpalmer

AB push to level off

On the Airbus pushing the ALT pb (330/340) will command the airplane to level off and maintain the new altitude (ALT HOLD engages). It will not try to return to the altitude at which the pb was...
Forum: Tech Log
17th Oct 2014, 15:55
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Fear

GPS Groundspeed...Really?
Try this on your next flight. Tell your fellow airman to close his eyes and tell you what the GPS groundspeed was sometime in the last minute. Try to mentally correlate...
Forum: Tech Log
16th Oct 2014, 01:33
Replies: 1,677
Views: 527,382
Posted By Bpalmer

AF447 did not reach an unusual attitude at any...

AF447 did not reach an unusual attitude at any point. The only parameter that could have triggered the unusual attitude law would have been the 45° AOA.

The EFIS is certainly capable of...
Forum: Tech Log
16th Oct 2014, 01:02
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Well, yes, of course —"point and go" wasn't meant...

Well, yes, of course —"point and go" wasn't meant as a technically complete description as you must know. But this is still essentially correct and opposite of the behavior one would expect from an...
Forum: Tech Log
16th Oct 2014, 00:47
Replies: 1,677
Views: 527,382
Posted By Bpalmer

yes, correct. It is normally a mix of g-load and...

yes, correct. It is normally a mix of g-load and pitch rate. More pitch rate at slower airspeeds, more g-load at higher airspeeds, with a crossover point where both influences are equal at an...
Forum: Tech Log
14th Oct 2014, 22:43
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Yes! That's a point that is often missed and...

Yes! That's a point that is often missed and underemphasized in learning to fly the bus. The airplane is essentially point-and-go. If you pull back on the stick for a few seconds and let go, the...
Forum: Tech Log
6th Oct 2014, 17:10
Replies: 1,677
Views: 527,382
Posted By Bpalmer

RetiredF4 Me too. But it seemed reasonable. ...

RetiredF4
Me too. But it seemed reasonable.
The pitch response with manual trim is fairly gentle as one can only move the trim wheel about 90° at a time in the practical sense, before having to...
Forum: Tech Log
5th Oct 2014, 20:49
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Elevator Control

Actually the Elevators each have four computer control possibilities and two hydraulic drive possibilities:
http://understandingaf447.com/images/A330elevatorcontrol.JPG

Control priority for each...
Forum: Tech Log
5th Oct 2014, 17:05
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Recoverable ?

My own A330 simulator trials of recovery after the stab trim was full nose up and the stall fully developed was that a prolonged nose down input did help—but only initially. However, as the angle of...
Forum: Tech Log
12th Sep 2014, 21:26
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Seems they can't both be true. Further more...

Seems they can't both be true.

Further more the tendency of the flight control law to want to pitch down at stall would be dependent on if the low-speed stabilities were active while in Alternate...
Forum: Tech Log
12th Sep 2014, 19:01
Replies: 1,677
Views: 527,382
Posted By Bpalmer

the Crew's Stall Training

The accident report details that they each had stall training in their A320 initial training-as it was the full course for that airplane. However, since their A330/A340 training was a differences...
Forum: Tech Log
12th Sep 2014, 18:55
Replies: 1,677
Views: 527,382
Posted By Bpalmer

Well, yes, of course. I didn't mean to imply they...

Well, yes, of course. I didn't mean to imply they were a pitch attitude problem, but a problem resolved with pitch control, not thrust levers.
Forum: Tech Log
11th Sep 2014, 18:09
Replies: 1,677
Views: 527,382
Posted By Bpalmer

High altitude stall practice

Well, that's not how I would put it. Robert had more Airbus time than the other two combined.
Robert is the one that turned up the gain on the radar as soon as he got up there. The captain was...
Forum: Tech Log
24th Aug 2014, 05:55
Replies: 1,677
Views: 527,382
Posted By Bpalmer

There is absolutely no evidence in the flight...

There is absolutely no evidence in the flight data to support this theory. Where was this aircraft that they could have possibly seen them?

Check out this animation that shows the other aircraft...
Forum: Tech Log
24th Aug 2014, 05:48
Replies: 1,677
Views: 527,382
Posted By Bpalmer

The simulators have no accurate model to...

The simulators have no accurate model to duplicate the behavior of the airplane post stall. Sure, they will exhibit a some sort of behavior (and I have personally flown it in several A-330...
Forum: Tech Log
18th Dec 2013, 04:31
Replies: 97
Views: 28,420
Posted By Bpalmer

Alpha Floor only functions in Normal Law. So, yes.

Alpha Floor only functions in Normal Law. So, yes.
Forum: Tech Log
24th Nov 2013, 20:08
Replies: 976
Views: 216,238
Posted By Bpalmer

It should have quit based on what? Your opinion? ...

It should have quit based on what? Your opinion?
In the absence of airspeed to switch the pitch mode to the Low Speed stability(i.e., Direct law -trim becomes manual only), the pitch mode remained...
Forum: Tech Log
24th Nov 2013, 19:55
Replies: 976
Views: 216,238
Posted By Bpalmer

At extremely high angles of attack (e.g., 45°)...

At extremely high angles of attack (e.g., 45°) the air striking the pitot tubes and the static ports (located well below the midline of the fuselage) approach the same angle. Indeed, at one point...
Forum: Tech Log
23rd Nov 2013, 19:56
Replies: 976
Views: 216,238
Posted By Bpalmer

That functionality only exists in Normal law. ...

That functionality only exists in Normal law.
In Alternate law, (if airspeed is available) the protections will provide Low Speed Stability, which is essentially direct law pitch (pitch trim stops,...
Forum: Questions
17th Jan 2013, 16:36
Replies: 15
Views: 3,057
Posted By Bpalmer

@roulishollandais I find the CVR quite...

@roulishollandais
I find the CVR quite enlightening. Being a current A330 captain helps.
But I do have to be careful about interpreting the English translation of the original transcript,...
Forum: Questions
16th Jan 2013, 19:53
Replies: 15
Views: 3,057
Posted By Bpalmer

I don't think it was a joke. The license...

I don't think it was a joke.
The license requirements to act as second in command are not the same to act as PIC (i.e., during the captain's absence). Seems to me he was asking if he was qualified...
Forum: Questions
16th Jan 2013, 14:49
Replies: 15
Views: 3,057
Posted By Bpalmer

Bonin qualified?

But Capt Dubois asks Bonin if his is qualified "you a PL?" to which Bonin responds "yeah".

What is Dubois actually asking him, does he have a pilot's license?
He certainly seems to be checking to...
Forum: Tech Log
15th Jan 2013, 23:51
Replies: 74
Views: 32,205
Posted By Bpalmer

Reset of ZFW/ZFWCG disagree

I've had this message several times on A330 and found that a reset of the FCMC's has always fixed the problem.
You've got a 50/50 chance of getting the correct one the first time.
Usually as soon...
Forum: Tech Log
21st Dec 2012, 21:03
Replies: 7
Views: 4,114
Posted By Bpalmer

B777 vs A330 alternate modes

The B777 in its "direct" mode attempts to do the same thing it does in its normal mode but with less data.
That is a g-load pitch with speed stability and roll direct .

The A330 Alternate 2 is a...
Forum: Tech Log
21st Dec 2012, 20:56
Replies: 308
Views: 76,560
Posted By Bpalmer

When above the AOA at which alpha Prot activates,...

When above the AOA at which alpha Prot activates, the sidestick becomes an angle-of-attack demand input. Thus, at neutral the sidestick commands the AOA equal to the onset of alpha prot. At full...
Forum: Tech Log
20th Dec 2012, 01:13
Replies: 308
Views: 76,560
Posted By Bpalmer

Stall AOA change due to Mach

The stall angle of attack does not start to increase with Mach until above about .3M, which in the "shortly after takeoff" range is about 200 knots. Obviously, the indicated equivalent to that goes...
Forum: Tech Log
16th Dec 2012, 01:26
Replies: 5
Views: 2,558
Posted By Bpalmer

step climb distance

One approach would be to put in the step climb at the waypoint of interest (so that the weight is about right), and see how many miles the FMS predicts that climb to take.
Then build a waypoint...
Forum: Tech Log
16th Dec 2012, 01:21
Replies: 16
Views: 6,795
Posted By Bpalmer

Autothrottle speed range

I can't seem to find a reference for it in my 777 manual, but perhaps it parallels a function on the A330 which is similar.
That is when the speed is controlled by the FMC, the speed range is...
Forum: Tech Log
16th Dec 2012, 00:31
Replies: 3
Views: 4,845
Posted By Bpalmer

A330 Rudders

All the A330's that Northwest purchased from Airbus were the A330 Advanced with fly by wire (electric) Rudders. The fleet consists of 332 and 333 with deliveries that started in 2003. These aircraft...
Forum: Tech Log
7th Dec 2012, 05:00
Replies: 10
Views: 4,136
Posted By Bpalmer

Amsterdam end taxiway

At EHAM, an A330 has to stop at the hold short lines on taxiway Z that goes around the end approach end of 36C
Forum: Tech Log
7th Dec 2012, 04:53
Replies: 21
Views: 33,400
Posted By Bpalmer

IRS/AHRS

The 787 has both IRS and AHRS, so to say that the modern jets have one instead of the other is not quite right.
Forum: Tech Log
7th Dec 2012, 04:51
Replies: 27
Views: 62,760
Posted By Bpalmer

300 ft altitude change

Think of airplanes coming the other direction on a adjacent track at the same altitude, or at neighboring altitudes. If you both have to deviate toword each other. The guy deviating to the north of...
Showing results 1 to 35 of 38
 


 
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