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Search: Posts Made By: fdr
Showing results 1 to 35 of 60
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Forum: Rumours & News
24th Nov 2019, 01:22
Replies: 4,656
Views: 4,790,956
Posted By fdr

The trigger mechanisms for the original MCAS had...

The trigger mechanisms for the original MCAS had speed (mach) and aoa conditions. Those equate to conditions such as a wind up turn, which is quite a way from a wind shear avoidance and/or recovery...
Forum: Rumours & News
12th Nov 2019, 02:02
Replies: 4,656
Views: 4,790,956
Posted By fdr

On the face of it I would agree Gums, but, then...

On the face of it I would agree Gums, but, then the goal posts are being moved here as well. The community understands the system that was at the heart of the two accidents, but now we have a new,...
Forum: Rumours & News
11th Nov 2019, 06:24
Replies: 4,656
Views: 4,790,956
Posted By fdr

I must be missing something, but I would have...

I must be missing something, but I would have placed a "Golden Parachute" in the same category as a "Lead Balloon". From a Newtonian Fiziks POV, thye don't assit greatly in stopping squishy soft...
Forum: Rumours & News
31st Oct 2019, 03:17
Replies: 4,656
Views: 4,790,956
Posted By fdr

The ANU case is less demanding but still requires...

The ANU case is less demanding but still requires handling that is not part of the normal training of the flight crew by the airlines, it may be part of advanced training gained in military training....
Forum: Rumours & News
29th Oct 2019, 11:58
Replies: 4,656
Views: 4,790,956
Posted By fdr

I suspect that no one understood how severe the...

I suspect that no one understood how severe the trim change would be, even up to the ET302 event. Particularly at higher speeds, the pickle trim rate is a fraction of that achieved by the MCAS as...
Forum: Rumours & News
28th Oct 2019, 08:45
Replies: 4,656
Views: 4,790,956
Posted By fdr

The KNKT Report on LNI 610 appears to have...

The KNKT Report on LNI 610 appears to have captured the general issues effectively, and given the amount of politics that exists in the background that is a good outcome. It is curious that the prior...
Forum: Rumours & News
15th Oct 2019, 03:45
Replies: 4,656
Views: 4,790,956
Posted By fdr

The facts stand in mute testimony to the...

The facts stand in mute testimony to the fundamental truth.

"Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things" Sir Isaac Newton

Oct 2018, splash...
Forum: Rumours & News
8th Oct 2019, 02:17
Replies: 4,656
Views: 4,790,956
Posted By fdr

In some cases, the cheese also matters. ...

In some cases, the cheese also matters.

Aviation is managed by exception. The SMS programs output stats that drive managers to implementing changes to show that some action was undertaken. Each...
Forum: Rumours & News
7th Oct 2019, 09:07
Replies: 4,656
Views: 4,790,956
Posted By fdr

BaL, Takwis, Grebe; the direction you are heading...

BaL, Takwis, Grebe; the direction you are heading is towards the light.

Good.

The benefit that retrofitting the warning is going to provide is basically negligible, and an argument could be...
Forum: Rumours & News
3rd Oct 2019, 00:01
Replies: 4,656
Views: 4,790,956
Posted By fdr

As the original system littered the sea bed and a...

As the original system littered the sea bed and a rocky field with over 300 people, that is a fairly low bar to be self-congratulatory over.

Collaring the Cb would have achieved a similar...
Forum: Rumours & News
1st Oct 2019, 20:33
Replies: 4,656
Views: 4,790,956
Posted By fdr

S-Pee; thanks for the links that includes...

S-Pee;

thanks for the links that includes Erik Holnagels work. Erik is one of the leaders in the field of stochastic system behaviour and safety. He established years ago the concept of FRAM,...
Forum: Rumours & News
1st Oct 2019, 20:20
Replies: 4,656
Views: 4,790,956
Posted By fdr

That the flightcrew were proximate to the event...

That the flightcrew were proximate to the event does not make them the primary cause of the event.
Under no stretch of the imagination did the aircraft meet the standards to be certified as...
Forum: Rumours & News
29th Sep 2019, 08:11
Replies: 4,656
Views: 4,790,956
Posted By fdr

Quite so, however, you can effectively sit back...

Quite so, however, you can effectively sit back and relax at this time, we have enough information to now understand the system;

Normal operations: you get airborne, trim runs automatically for...
Forum: Rumours & News
28th Sep 2019, 09:07
Replies: 4,656
Views: 4,790,956
Posted By fdr

Those opinions of Mr L+12 suggest a level of a...

Those opinions of Mr L+12 suggest a level of a depth of knowledge in the matter of causation that would be able to be written in large font on the business end of a pin.

Brings to mind:

[Brian...
Forum: Rumours & News
27th Sep 2019, 10:21
Replies: 4,656
Views: 4,790,956
Posted By fdr

True words sir, NASA/CR–2015-218982...

True words sir,

NASA/CR–2015-218982 Application of SAE ARP4754A to Flight Critical Systems is a good primer for the process, and indicates both the complexity and the potential for missing the...
Forum: Rumours & News
26th Sep 2019, 23:00
Replies: 4,656
Views: 4,790,956
Posted By fdr

"Boeing assumed that an MCAS failure had a safety...

"Boeing assumed that an MCAS failure had a safety risk that was "major," which was less severe than the "catastrophic" category, the NTSB said. The company assumed pilots would easily recognise an...
Forum: Rumours & News
26th Sep 2019, 22:17
Replies: 4,656
Views: 4,790,956
Posted By fdr

There are two conditions where the manual trim...

There are two conditions where the manual trim force is reduced,

When the aircraft is at the speed (AOA) as trimmed by the THS/Stab, where no deflection of the elevator is needed
Approaching...
Forum: Rumours & News
23rd Sep 2019, 01:52
Replies: 4,656
Views: 4,790,956
Posted By fdr

The crew were reacting to a fault that presented...

The crew were reacting to a fault that presented as a compound series of symptoms, and for a period of time they maintained a level of control of the situation. If we are discussing JT610, then the...
Forum: Rumours & News
21st Sep 2019, 12:31
Replies: 4,656
Views: 4,790,956
Posted By fdr

Thumbs up Seconded. out there >...

Seconded.

out there > .................................................. > TRUTH
Forum: Rumours & News
20th Sep 2019, 13:57
Replies: 4,656
Views: 4,790,956
Posted By fdr

they also have obligations under the AUS USA...

they also have obligations under the AUS USA BIASA... which makes one wonder what the merit of any agreements is today.
Forum: Rumours & News
16th Sep 2019, 06:49
Replies: 4,656
Views: 4,790,956
Posted By fdr

interesting. Dear defanged viper, IIRC, your...

interesting.

Dear defanged viper, IIRC, your ride, Boyd's mafia LWF, had an FBW FLCS (analog in 79..., digital later). Stevens and Lewis provide the control derivatives in Appendix A of their book...
Forum: Rumours & News
14th Sep 2019, 15:22
Replies: 4,656
Views: 4,790,956
Posted By fdr

TURB; PPRuNe provides an opportunity for a...

TURB;

PPRuNe provides an opportunity for a wide range of inputs and thoughts on all manner of subjects. It would be self limiting if only people of a particular viewpoint, experience or flavour...
Forum: Rumours & News
13th Sep 2019, 14:58
Replies: 4,656
Views: 4,790,956
Posted By fdr

Tomaski, Noted, My comment is a...

Tomaski,

Noted,

My comment is a continuation of my musings. Your response led me to review my own, and reply above. Your desire to see more hand flying is a solution that is in line with the...
Forum: Rumours & News
13th Sep 2019, 14:03
Replies: 4,656
Views: 4,790,956
Posted By fdr

maybe

maybe

maybe not

An aircraft stalling accidentally isn't due to manual flying skills, it is because the driver doesn't recognise his energy or spatial orientation state. Now driving holes...
Forum: Rumours & News
13th Sep 2019, 10:07
Replies: 4,656
Views: 4,790,956
Posted By fdr

CAA SN–2019/005 is a direct response to the...

CAA SN–2019/005 is a direct response to the second B737 Max loss. It may be polite and encapsulated in vague discussion, but it is directly talking to the 737 trim system. Peripherally, it may remind...
Forum: Rumours & News
12th Sep 2019, 02:02
Replies: 4,656
Views: 4,790,956
Posted By fdr

? Most aircraft are more or less in balance...

?

Most aircraft are more or less in balance in a climbing turn, it keeps the lipstick off the windows at row 68Z and avoids sloshing elsan blue out into the aisles. There is a slight change in aoa...
Forum: Rumours & News
6th Sep 2019, 10:32
Replies: 4,656
Views: 4,790,956
Posted By fdr

I must be getting slow after a long day flying,...

I must be getting slow after a long day flying, but I remain rather befuddled as to what basis the latest issues by EASA arise under. I was apparently mistaken in my belief that EASA is a signatory...
Forum: Rumours & News
5th Aug 2019, 05:24
Replies: 4,656
Views: 4,790,956
Posted By fdr

M(f) S; was that OEB117 or LSAS?

M(f) S; was that OEB117 or LSAS?
Forum: Rumours & News
4th Aug 2019, 01:19
Replies: 4,656
Views: 4,790,956
Posted By fdr

musings... The response time on briefed and...

musings...

The response time on briefed and prepared, readily identifiable events is short, and history is littered with examples that flight crew often do not meet these response times. That is...
Forum: Rumours & News
30th Jul 2019, 04:55
Replies: 4,656
Views: 4,790,956
Posted By fdr

The engine certification including containment is...

The engine certification including containment is not dependent on the size of the engine, the outcome for the blade separation is constant. For a ruptured disk, history has shown that no design is...
Forum: Rumours & News
28th Jul 2019, 18:56
Replies: 4,656
Views: 4,790,956
Posted By fdr

As disappointing as the saga of the MCAS is, the...

As disappointing as the saga of the MCAS is, the subject of the rudder control runs and the perception of a threat from a liberated fan blade should be considered rationally. A mob lynching doesn't...
Forum: Rumours & News
16th Jul 2019, 02:05
Replies: 4,656
Views: 4,790,956
Posted By fdr

Micro VGs on the outboard slats would add a...

Micro VGs on the outboard slats would add a slight drag rise in the cruise, but that could also be offset if acting on the cross flow instabilities near the winglet-wing transition. A couple of biz...
Forum: Rumours & News
15th Jul 2019, 12:17
Replies: 4,656
Views: 4,790,956
Posted By fdr

TD, maybe... but the basic pitch issue is...

TD,
maybe... but the basic pitch issue is relatively quantifiable, at least a limit case can be made for it. We know the problem is a clean config issue, that strongly suggests that the Cm of the...
Forum: Rumours & News
15th Jul 2019, 03:46
Replies: 4,656
Views: 4,790,956
Posted By fdr

If they are going for the aero fix, which I still...

If they are going for the aero fix, which I still doubt, then the easiest solution is to

1. reduce the efficiency of the vane on the nacelle, which will give a nose down trim at high AOA, but a...
Forum: Rumours & News
15th Jul 2019, 00:47
Replies: 4,656
Views: 4,790,956
Posted By fdr

It may be inferred that Thompson is suggesting...

It may be inferred that Thompson is suggesting that ""expeditious" RTF" is needed, but it is also able to be inferred that the importance of Boeing to the US economy is so large that they need to get...
Showing results 1 to 35 of 60
 
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