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Search: Posts Made By: silverstrata
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1st May 2022, 07:08
Replies: 180
Views: 92,121
Posted By silverstrata

. Do Air France use V-bar flight directors? ...

.
Do Air France use V-bar flight directors?
(Reason for extreme control inputs.)

I had a similar situation, when the copilot started mixing the (bright pink) flight director with the (black)...
5th Apr 2022, 20:33
Replies: 180
Views: 92,121
Posted By silverstrata

Finger trouble? Or computer trouble. One of...

Finger trouble? Or computer trouble.
One of the two…..

Silver
25th Mar 2022, 16:22
Replies: 592
Views: 1,003,576
Posted By silverstrata

. When the 737 NG was first introduced it did...

.
When the 737 NG was first introduced it did lose a number of elevators in flight, due to excessive turbulence from the flight spoilers. So the max speed for spoiler deployment was reduced to 240...
22nd Feb 2021, 22:39
Replies: 285
Views: 229,242
Posted By silverstrata

Looks like I was right - the blade-tip went...

Looks like I was right - the blade-tip went forwards, and sliced through the cowling ring, eventually destroying the entire cowling (and then hitting the wing-root). There was a lot of push-back to...
21st Feb 2021, 17:51
Replies: 285
Views: 229,242
Posted By silverstrata

I have never been to Denver either. But at most...

I have never been to Denver either. But at most airfields you can expect a left-right split between take-off and landing. That is pretty axiomatic, but it gives you an idea of the circuit pattern.
...
21st Feb 2021, 16:27
Replies: 285
Views: 229,242
Posted By silverstrata

fergusd Yes, really. Engine manufacturers...

fergusd

Yes, really.
Engine manufacturers test a whole blade separation, as that is the worst case scenario for the containment-ring. But a blade tip has much more forward pressure when it...
21st Feb 2021, 14:01
Replies: 285
Views: 229,242
Posted By silverstrata

DaveReidUK If you has posted the pic, we...

DaveReidUK

If you has posted the pic, we would know.
This is not a guessing-game.

P.S. The reason the containment-ring appears intact, is the blade-tips often fly off forwards, hitting the...
21st Feb 2021, 13:42
Replies: 285
Views: 229,242
Posted By silverstrata

Capn Bloggs Yeah - we know that. But every...

Capn Bloggs

Yeah - we know that.
But every aircraft has left a loadsheet behind, for the last 80 years.
And with modern comms, it is not difficult to get that information from the handling agent...
21st Feb 2021, 13:40
Replies: 285
Views: 229,242
Posted By silverstrata

fdr Link? Image? The N1 fan appears to...

fdr

Link?
Image?
The N1 fan appears to be intact, as does the containment-ring.
So which blades can you see, other than the N1?
21st Feb 2021, 13:04
Replies: 285
Views: 229,242
Posted By silverstrata

bsieker Here is a Bae146 engine with an...

bsieker

Here is a Bae146 engine with an exploded combustion chamber, that also took out the cowlings.

The vibration we can see on the B777 failure may be aerodynamic, as the slipstream runs...
21st Feb 2021, 12:49
Replies: 285
Views: 229,242
Posted By silverstrata

Why do ATC always ask stupid questions about fuel...

Why do ATC always ask stupid questions about fuel and souls on board..?

Look, ATC paper-shufflers, the aircraft has only just taken off, so it has enough fuel to hang around for ages.
And the...
21st Feb 2021, 12:27
Replies: 285
Views: 229,242
Posted By silverstrata

The flames are coming out of the thrust-reverser...

The flames are coming out of the thrust-reverser matrix.
Which might suggest a failure between the HP compressors and the turbine section.
Perhaps in the combustion chamber itself.
I imagine an...
27th Jan 2021, 19:27
Replies: 64
Views: 43,239
Posted By silverstrata

? The bottom line here, is that the Max should...

?
The bottom line here, is that the Max should never have been produced, as it is an ancient dog of an aircraft. But it was pushed down the line because S.outhwest and R.yan wanted a cheap aircraft...
10th Jan 2021, 09:49
Replies: 872
Views: 917,526
Posted By silverstrata

Yes, but the 737 also had at least one high-speed...

Yes, but the 737 also had at least one high-speed rudder hard-over event in the cruise.
Due to their speed this crew were able to recover, but it was a major event that nearly turned them...
9th Jan 2021, 15:36
Replies: 872
Views: 917,526
Posted By silverstrata

Uplinker Rudder hard-over? The graph by...

Uplinker

Rudder hard-over?
The graph by DaveReid suggests a 40,000 ft/min descent, which suggests almost vertical.

Some old aircraft were still running with the simple hydraulic...
31st Jul 2020, 12:01
Replies: 96
Views: 59,732
Posted By silverstrata

The trouble used to be that it was impossible to...

The trouble used to be that it was impossible to to get compassionate days off. And if you made a request that was turned down (as they all were), you had openly declared your hand - and could not...
26th May 2020, 19:37
Replies: 1,673
Views: 2,887,376
Posted By silverstrata

Are those kind of descent rates possible on final...

Are those kind of descent rates possible on final approach, without the gear?
They went from 2000’ to 100’ in 1.4 minutes, while slowing down from 240 to 210 kts.
That is about 1500’/min, while...
24th May 2020, 09:40
Replies: 1,673
Views: 2,887,376
Posted By silverstrata

Well said. And yet there are STILL airlines out...

Well said.
And yet there are STILL airlines out there, that call positive rate instead of positive climb.

In addition to your reasoning, inertial vertical speed indicators will show a false...
27th Feb 2020, 14:07
Replies: 60
Views: 44,350
Posted By silverstrata

They will be breaking up brand new B737 Maxs...

They will be breaking up brand new B737 Maxs soon...

Silver
13th Feb 2020, 22:02
Replies: 76
Views: 39,133
Posted By silverstrata

Eh? The pilots chose the wrong descent mode -...

Eh? The pilots chose the wrong descent mode - rate of descent instead of angle of descent.
While you might claim ergonomic deficiencies were involved, and I would probably agree, the aircraft did...
13th Feb 2020, 12:01
Replies: 76
Views: 39,133
Posted By silverstrata

Yes, all the NG flap and slat-tracks had to be...

Yes, all the NG flap and slat-tracks had to be replaced, because the bearings had seized.
And now all the pickle-forks should be replaced.
The NG was not as well engineered as the Classic, and the...
12th Feb 2020, 09:26
Replies: 76
Views: 39,133
Posted By silverstrata

Think you are wrong there. Unlike all other...

Think you are wrong there. Unlike all other aircraft, the 737 had a single rudder PCU. (A bit like MCAS only using one AoA sensor - you would have thought Boeing would have learned by now that two...
5th Feb 2020, 17:47
Replies: 33
Views: 16,180
Posted By silverstrata

With respect, I don’t agree. We had many a fume...

With respect, I don’t agree. We had many a fume events on 146s (containing organophosphates), from leaky seals.
And worse of all was the APU, which could fill the cabin with blue smoke (containing...
20th Dec 2019, 20:35
Replies: 214
Views: 212,098
Posted By silverstrata

Probably because he pushed zero or negative g. ...

Probably because he pushed zero or negative g. In the gliding world, they do a lot of training on the difference between zero g and a stall, but that is not always so in power flying. Zero g can...
8th Dec 2019, 17:10
Replies: 179
Views: 275,171
Posted By silverstrata

Looks like Boeing intends recruiting hundreds of...

Looks like Boeing intends recruiting hundreds of 737 drivers, to deliver all these grounded Maxes.

Anyone know who is doing the recruiting?
...
14th Nov 2019, 11:01
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

No, but if they discovered a discrepancy, they...

No, but if they discovered a discrepancy, they could turn the whole system off for the rest of the flight. Although this is not ideal, and a tri-voting system would be better, turning the system off...
10th Nov 2019, 18:05
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

I noticed this comment a few times in the Seattle...

I noticed this comment a few times in the Seattle newspaper. But on those FDR traces of the Ethiopian accident, it clearly shows that full back elevator was being applied (at the very end), and the...
8th Nov 2019, 23:09
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

The original 737 hardware was the 286 processor,...

The original 737 hardware was the 286 processor, and they were still using it in the NG.
If the same is true for the Max, the number of Silicon Valley techies who understand this antiquated system...
20th Oct 2019, 08:48
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

Err this is the commercial world. You cannot...

Err this is the commercial world.
You cannot take your biggest customer to court....

Silver
19th Oct 2019, 15:59
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

LowObservable. You forget that number 3. is...

LowObservable.

You forget that number 3. is also widespread in smaller airlines and some third world airlines. That is why most aircraft have multiple redundancies, and don’t have safety-critical...
19th Oct 2019, 12:17
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

These were not the test pilots, these were the...

These were not the test pilots, these were the technical pilots who were trying to write up the systems for regulators and operators. Later on, these two complain that the test pilots were not...
19th Oct 2019, 12:10
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

Think about it. These are the technical pilots...

Think about it. These are the technical pilots who liaise with the FAA and write the manuals, and they seem to have no idea how MCAS works. As you say, they are conflating MCAS with Speed Trim, and...
4th Sep 2019, 13:07
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

In other words, a MCAS failure was being...

In other words, a MCAS failure was being deliberately obscured as a trim runaway - when it was not. A trim runaway does not start and stop. A trim runaway is not triggered by a single faulty AofA...
23rd Aug 2019, 10:28
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

A basic tenet of aviation, is you are not...

A basic tenet of aviation, is you are not supposed to (allowed to) use the trimmer as a primary flight control. It is only there to remove stick loads, after a manoeuvre has been completed. You can...
23rd Aug 2019, 10:17
Replies: 4,656
Views: 4,574,191
Posted By silverstrata

Interesting analysis. He says there: ...

Interesting analysis. He says there:



Since when has aviation done anything other than dual architecture?
Who in the Boeing design team thought single architecture was a good idea?
Who in...
Showing results 1 to 35 of 578
 


 
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