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Search: Posts Made By: SteinarN
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Forum: Rumours & News
30th Oct 2019, 17:46
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

Damn, Mr Cohen REALLY gave it to Muilenburg :E

Damn, Mr Cohen REALLY gave it to Muilenburg :E
Forum: Rumours & News
30th Oct 2019, 15:58
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

Is there a link to todays hearing?

Is there a link to todays hearing?
Forum: Rumours & News
21st Oct 2019, 10:59
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

Wasn't the need to extend MCAS to the low speed...

Wasn't the need to extend MCAS to the low speed 1G region only discovered fairly late in the flight test campaign? I am sure I've read that from a reliable(?) source, could be Leeham or SatcomGuru....
Forum: Rumours & News
5th Sep 2019, 10:09
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

As i said, I had to make several assumptions, the...

As i said, I had to make several assumptions, the most major assumption was at what AOA the MCAS starts, and at what AOA MCAS reaches its full travel. If MCAS starts putting in AND at 10 degrees AOA...
Forum: Rumours & News
5th Sep 2019, 09:37
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

A couple months ago I tried to make a...

A couple months ago I tried to make a back-of-the-envelope calculation on what the elevator forces/positions would be in the 10-14 AOA region. Ofc I had to make several assumptions, like that the...
Forum: Rumours & News
4th Sep 2019, 13:03
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

And at the same time Boeing obviously did NOT...

And at the same time Boeing obviously did NOT expect the pilots do diagnose a correct MCAS activation in a real high AOA event as trim runaway. How did Boeing figure this out, that the pilots would...
Forum: Rumours & News
22nd Jul 2019, 17:22
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

The first Ariane 5 launch failure in the 90's...

The first Ariane 5 launch failure in the 90's would be a prime example for just such a software error.
Forum: Rumours & News
10th Jul 2019, 11:40
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

That is correct. There is several...

That is correct.

There is several similarities between those two professions.

The control software of complicated refrigeration plants occasionally contains one or more serious flaws.
The...
Forum: Rumours & News
9th Jul 2019, 21:41
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

737 driver to name one was very assertive about...

737 driver to name one was very assertive about just that. He made it sound so easy, too easy in my view.
Forum: Rumours & News
8th Jul 2019, 14:23
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

Very interesting. So, lets say the pilots...

Very interesting.

So, lets say the pilots mismanages the speed, for example autothrottle disconnected without pilots noticing. Speed decayes, AOA increases, passes MCAS treshold, MCAS start to put...
Forum: Rumours & News
8th Jul 2019, 07:11
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

MCAS is a lot faster, actually 50 percent faster....

MCAS is a lot faster, actually 50 percent faster. It trims at 0.27 units/second versus main electric trim at 0.18 units/second with flaps up.

So, 9.2 seconds MCAS needs a whopping 13.8 seconds of...
Forum: Rumours & News
5th Jul 2019, 04:42
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

I saw your post before it got deleted. Try to...

I saw your post before it got deleted. Try to post it again. It was a factual mathematical chart, should be no reason whatsoever to delete it.
Forum: Rumours & News
2nd Jul 2019, 10:32
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

I didnt say anything about thermal protection of...

I didnt say anything about thermal protection of the IGBT, I was only adding that there could well be that there was thermal sensing of the windings in the motor. But ofc, that is pure specualtion...
Forum: Rumours & News
2nd Jul 2019, 09:42
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

A brushless three phase motor could be a "normal"...

A brushless three phase motor could be a "normal" induction motor. Or it could be a permanent magnet motor. And it can have some position feedback added to it. And even though it's not specifically...
Forum: Rumours & News
30th Jun 2019, 16:39
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

This is something I too am VERY curious about. ...

This is something I too am VERY curious about.

I have tried to make some thought experiments.
We know MCAS at low speed was supposed to administer up to 2.5 units AND trim.
We dont know from...
Forum: Rumours & News
30th Jun 2019, 09:16
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

Well, there is a large number, certainly in...

Well, there is a large number, certainly in excess 100, of true/false datapoints recorded by the FDR, the manual trim up/trim down to be one of them where each (trim up, trim down) have its own...
Forum: Rumours & News
29th Jun 2019, 18:00
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

And 747 twice, at least. And the 777 is getting...

And 747 twice, at least.
And the 777 is getting its second reengine I think it is fair to say

If the frame lives long enough it will be reengined every 15 years or so.
Forum: Rumours & News
27th Jun 2019, 11:33
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

From Aviation Week...

From Aviation Week...
Forum: Rumours & News
5th Jun 2019, 11:36
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

Well, I dont know which Embraer aircraft you have...

Well, I dont know which Embraer aircraft you have in mind and wheter it is fully FBW.
Speaking of Airbus aircraft a major difference compared to the 737 it that the Airbus (and Boeing from the 777...
Forum: Rumours & News
28th May 2019, 12:14
Replies: 4,656
Views: 4,779,968
Posted By SteinarN

FBW planes like A320 and newer and B777 and newer...

FBW planes like A320 and newer and B777 and newer have much more redundancy like several FCC with several channels each continuously comparing their output with each other, possibly more than one...
Showing results 1 to 20 of 20


 
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