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Search: Posts Made By: Graybeard
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Forum: Tech Log
7th Aug 2011, 11:14
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Performed Exactly as Designed

I've seen that so many times on these pages in defense of AB, in effort to end a line of thinking. How about considering the design is just plain defective?

How much of the PNF attention was on...
Forum: Tech Log
6th Aug 2011, 03:27
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

It's you who previously threw out the probability...

It's you who previously threw out the probability of a 777 backdrive failure rendering it no better than a joystick.

The 777 backdrive provides continuous feedback to the PNF of the commands by...
Forum: Tech Log
4th Aug 2011, 02:41
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

DWBirgenair was different, because the lower...

DWBirgenair was different, because the lower ranked FO knew what was happening, and was emotionally powerless to correct the Capt. . The FO could have overpowered Capt. by pushing harder on the...
Forum: Tech Log
1st Aug 2011, 22:41
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Airspeed Input to Stall Warning

AB added to the complication of SW warning logic by adding the airspeed input. Couldn't they have kept it simple?
Forum: Tech Log
1st Aug 2011, 14:47
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

SebaskaAgain, I'm quoting DC-10 SW from AOA,...

SebaskaAgain, I'm quoting DC-10 SW from AOA, because I have the data handy. Its SW from AOA is modified by position of flaps and slats, not "low&slow and high&fast."

According to a prior poster,...
Forum: Tech Log
1st Aug 2011, 00:54
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

You obviously haven't been following these...

You obviously haven't been following these threads.

According to many prior posts here, the Stall Warning shuts off below 60 kt IAS. Why they have IAS input to SW is beyond me. The DC-10, for...
Forum: Tech Log
21st Jul 2011, 14:34
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

AOA

SEB: . . 447 could not have very low speed for very long. It was either moving forward, or dropping fast enough to keep the AOA vanes pointed into the relative wind.

It still puzzles me why the...
Forum: Tech Log
4th Jul 2011, 16:24
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Optional vs. Mandatory

Mandatory Service Bulletins are paid by the manufacturer: Thales or Airbus in this case. Optional SB are paid by the user, and on the user's schedule. The maker tends to downplay the urgency, in...
Forum: Tech Log
27th Jun 2011, 02:42
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Ecam alerts and warnings must have been a...

Ecam alerts and warnings must have been a cacophony. The CVR audio must be interesting.
Forum: Tech Log
13th Jun 2011, 13:34
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Pitch Trim Authority

The discussion on pitch/power has been enlightening. Guess I shouldn't be surprised there's so much misunderstanding in this group, as just now A&B are admitting power alone does not give you speed...
Forum: Tech Log
11th Jun 2011, 11:02
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

The Duh in Aerodynamics

An airliner on departure, climb, cruise, descent, approach and landing is like a symphony orchestra, with all the components working in concert. The conductor can be the FMS, Fright Management...
Forum: Tech Log
9th Jun 2011, 05:31
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Old Airplane with Control Problem

About ten years ago, the Roll Channel went to sleep on an Evergreen 747-1 cargo plane one night over Canada enroute KJFK-KANC. It was well beyond 30 degrees roll when the pilot caught it. They went...
Forum: Tech Log
4th Jun 2011, 04:09
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Thanks ExLeftSeat. As a politician would say, "I...

Thanks ExLeftSeat. As a politician would say, "I misremembered; I misspoke; it happened Northwest of New York" etc. I'll go back and fix it.
Forum: Tech Log
2nd Jun 2011, 00:52
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Static Balance

Every AOA sensor I've seen on ground has been full stop down (neg AOA), which indicates no static balance. Don't believe I've ever seen one in flight. :)

I don't know a lot about AOA vanes,...
Forum: Tech Log
1st Jun 2011, 23:37
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Barnyard Logic II

Lonewolf50

The real measure of AOA is degrees, not knots, of course, although everybody has been shouting for a Stall Warning below 60 knots, not a specific AOA.

I don't have the numbers,...
Forum: Tech Log
1st Jun 2011, 14:30
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Barnyard Logic

Go outside, farmer, and look at the weather vane on your barn. Note, it aligns into the wind because its tail has more area than its point, which is only needed for static nose/tail balance. Note...
Forum: Tech Log
1st Jun 2011, 03:10
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Stall Whining

I wish somebody intimate with AOA vanes would come on here and explain authoritatively why stall warning shuts off below 60. It's a physical limitation. Maybe one of you whiners could come up with a...
Forum: Tech Log
31st May 2011, 13:49
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Optional, or Mandatory

Shogan1977, from Der Spiegel:

Money is in play here, I'm sure. Typically, if the component maker or airframe builder make a Service Bulletin mandatory, they pay for it. If the SB is optional,...
Forum: Tech Log
31st May 2011, 01:56
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

TCAS Fail Unrelated to Other

TCAS depends on Range, Rate of Closure and Altitude Difference for Collision Avoidance, nothing more.

Range and Rate of Closure are determined by interrogating other aircraft's transponder. TCAS...
Forum: Tech Log
30th May 2011, 15:48
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Too Many Laws

Seems like too much pilot training is spent on understanding five control laws: Normal, Alt 1, Alt 2, Direct, Abnormal. Are there more?

Makes me wonder if more than two are needed or desirable:...
Forum: Tech Log
30th May 2011, 02:38
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

VSI

+/- 0-6K fpm is the typical VSI range on the steam gauges. What is max displayed on AI EFIS? Could the VSI display have flagged or just disappeared, due to out of limit input of 10K and more?
...
Forum: Tech Log
30th May 2011, 00:41
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

MSM Coverage

Glad to see you're still/back with us Mr. Obrien. I enjoyed the CNN bit you did with your plane a couple of months ago. While I don't follow every MSM report, and turn off Fox/WSJ, I've tended to...
Forum: Tech Log
29th May 2011, 16:27
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

ECAM, how would you prevent the secondary pitots...

ECAM, how would you prevent the secondary pitots from icing up?

Better to have pitot probe heat robust enough not to allow icing up.

Then educate the autopilot to go into pitch and power hold...
Forum: Tech Log
28th May 2011, 20:17
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

757

The maddening part of Birgenair is the Capt merely had to reach forward to his outboard instrument panel and rotate his Air DATA switch from NORM to ALT.

AeroPeru 603 was a through flight from...
Forum: Tech Log
28th May 2011, 18:51
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

A/P Not as Smart as Touted

The A/P should have rejected the errant airspeeds, gone into pitch and power hold mode, and stayed in normal law.
Forum: Tech Log
28th May 2011, 06:59
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

The A330 Autopilot can't handle varying erroneous...

The A330 Autopilot can't handle varying erroneous airspeed from 3 sources, so it disconnects and hands the task to the pilot. That shows a lack of forethought.

Juneau, the capitol, is reached...
Forum: Tech Log
20th May 2011, 00:06
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Thanks for all the inputs. What radar did...

Thanks for all the inputs.

What radar did Pulkovo have in their TU-154?

Southern Airways DC-9 was flying the old x-band magnetron radar, and it sure could lead you into a storm, if...
Forum: Tech Log
18th May 2011, 16:35
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

When was the last time an airliner at cruise was...

When was the last time an airliner at cruise was brought down by a thunderstorm?

GB
Forum: Tech Log
17th May 2011, 13:14
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

Big Hunch

Kids in cockpit.

One of the pilots had his family in J class.

Mexicana 940, 31 Mar 1986. Wiki has some info.

727 arrived MEX with dragging brake. Departing Capt boarded his family,...
Forum: Tech Log
2nd May 2011, 02:54
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

In days of olde, the CVR yielded much more than...

In days of olde, the CVR yielded much more than the 5 or 13 parameter FDR. The large number of parameters in this DFDR should reveal most or all that's really needed.
Forum: Tech Log
1st May 2011, 18:02
Replies: 3,435
Views: 1,672,813
Posted By Graybeard

http://www.bea.aero/fr/enquetes/vol.af.447/images/...

http://www.bea.aero/fr/enquetes/vol.af.447/images/fdr2.reduite.jpg

http://www.bea.aero/fr/enquetes/vol.af.447/images/fdr2.reduite.jpg

Let's hope it's as intact inside as it appears on the...
Showing results 1 to 31 of 31


 
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