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17th Feb 2020, 05:50
Replies: 379
Views: 148,083
Posted By GordonR_Cape

WOW, WOW, WOW! This article says things out...

WOW, WOW, WOW!

This article says things out loud which many of us suspected a year ago, and explains them in a way which is much clearer than some of the mainstream coverage. It also addresses...
9th Feb 2020, 12:09
Replies: 85
Views: 66,975
Posted By GordonR_Cape

The weather might have something to do with it:...

The weather might have something to do with it: https://www.bbc.com/news/uk-51425482
3rd Feb 2020, 12:14
Replies: 637
Views: 1,574,374
Posted By GordonR_Cape

The BBC reports that the Ukrainian leak of the...

The BBC reports that the Ukrainian leak of the ATC tape is further straining the investigation: https://www.bbc.com/news/world-middle-east-51356626
23rd Jan 2020, 14:14
Replies: 2
Views: 2,136
Posted By GordonR_Cape

We don't know the cause yet, but the area has...

We don't know the cause yet, but the area has mountains very close to the north side of the airport (open ocean to the south), and persistent clouds at this time of year. I assume that it had...
23rd Jan 2020, 12:43
Replies: 2
Views: 2,136
Posted By GordonR_Cape

SA CAA calibration aircraft crash near George

https://www.news24.com/SouthAfrica/News/fears-for-three-crew-members-as-plane-goes-missing-near-george-20200123


...
Forum: Jet Blast
2nd Jan 2020, 04:20
Replies: 51
Views: 7,001
Posted By GordonR_Cape

There are a very large number of satellites in...

There are a very large number of satellites in closely spaced geostationary orbit, and many of them broadcast similar content. It is quite possible to point at the wrong one, where the signal...
28th Dec 2019, 18:17
Replies: 7
Views: 8,003
Posted By GordonR_Cape

Significant impact, apparently near the post...

Significant impact, apparently near the post office: https://www.bbc.com/news/world-us-canada-50935208
16th Dec 2019, 10:20
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

Short answer: The autopilot and MCAS are...

Short answer: The autopilot and MCAS are different sub-systems running on each FCC.

The autopilot is a 3-axis system, and demands high integrity data from muliple sensors to operate safely.
...
Forum: Rotorheads
16th Dec 2019, 07:58
Replies: 78
Views: 47,068
Posted By GordonR_Cape

Thanks Kiwithrottlejockey its a bit bigger than I...

Thanks Kiwithrottlejockey its a bit bigger than I thought.

The only missing bit is the scale: Heights in meters, and grid scale in kilometers.
15th Dec 2019, 05:54
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

The recent comments about MCAS reinforce the...

The recent comments about MCAS reinforce the point that it is very difficult to design a complex system that is safe, effective and reliable, and operates within the limitations of the human-machine...
14th Dec 2019, 08:50
Replies: 64
Views: 39,521
Posted By GordonR_Cape

Short answer: The fibers in carbon composite are...

Short answer: The fibers in carbon composite are not continuous, but embedded in a non-conducting polymer matrix.
Forum: Rotorheads
12th Dec 2019, 12:44
Replies: 78
Views: 47,068
Posted By GordonR_Cape

Correct in all details, except for molten lava,...

Correct in all details, except for molten lava, which forms an entirely different type of volcano. Incandescent rocks are possible, but its mostly superheated steam. See:...
9th Dec 2019, 05:00
Replies: 357
Views: 483,044
Posted By GordonR_Cape

Thanks for the link! The mythical man-hour: The...

Thanks for the link! The mythical man-hour: The length of the job may depend on the size of the team, and how many technicians can squeeze into a confined wheel bay, or remove skin rivets on the...
4th Dec 2019, 20:40
Replies: 30
Views: 18,927
Posted By GordonR_Cape

Long-delayed developments starting to unfold....

Long-delayed developments starting to unfold. Links in the News forum: https://www.pprune.org/rumours-news/627643-south-african-airways-going-under.html
4th Dec 2019, 20:38
Replies: 24
Views: 8,563
Posted By GordonR_Cape

Long-delayed developments starting to unfold:...

Long-delayed developments starting to unfold: https://www.fin24.com/Companies/Industrial/breaking-saa-must-go-into-business-rescue-ramaphosa-orders-20191204
30th Nov 2019, 19:08
Replies: 1
Views: 5,572
Posted By GordonR_Cape

This saga has been going on for so many years,...

This saga has been going on for so many years, that it is hard to believe than anything will happen over the weekend.

There is already a current thread in the African aviation forum:...
29th Nov 2019, 22:51
Replies: 24
Views: 8,563
Posted By GordonR_Cape

Leading travel agents and insurers no longer...

Leading travel agents and insurers no longer prepared to underwrite tickets on SAA, due to the risk of insolvency:...
26th Nov 2019, 23:19
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

I agree to some extent, I noted dozens of...

I agree to some extent, I noted dozens of nit-picks in the article. Many new facts have emerged since Apr 2019, but fundamental issues remain unanswered. Neither Boeing nor the FAA have clarified...
26th Nov 2019, 22:15
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

Thanks for the link, which I had not seen before....

Thanks for the link, which I had not seen before. It included a description of an issue that I raised recently (which elicited some skepticism):


My bold added.

Edit: I understand that it is...
25th Nov 2019, 04:20
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

Under MCAS 1.0 the linearity would be preserved,...

Under MCAS 1.0 the linearity would be preserved, because the system could fire a second time if the pilot continued to pull up. With MCAS 2.0 this repeated triggering can no longer happen during a...
24th Nov 2019, 17:00
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

That is also an excellent link on FBW pitch...

That is also an excellent link on FBW pitch augmentation, relevant to the above discussion, and the opposite of what MCAS does.
24th Nov 2019, 16:54
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

I think fdr nailed it earlier with this chart of...

I think fdr nailed it earlier with this chart of the unsatisfactory control forces (trim-speed as a proxy for AOA).
...
24th Nov 2019, 16:10
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

Allowing MCAS to move the horizontal stabiliser...

Allowing MCAS to move the horizontal stabiliser into a nose down position does not solve the non-linear elevator feel curve. It simply forces the aircraft away from that part of the flight envelope....
24th Nov 2019, 15:21
Replies: 4,656
Views: 4,274,988
Posted By GordonR_Cape

AFAIK the B737 elevator feel computer is a...

AFAIK the B737 elevator feel computer is a hydraulic mechanism, not an electronic system. Reverse engineering it would create many more certification obstacles than it would solve. It would also be...
24th Nov 2019, 00:04
Replies: 5
Views: 4,139
Posted By GordonR_Cape

Another Air Tanzania aircraft was previously...

Another Air Tanzania aircraft was previously seized in South Africa (for a while), in a related lawsuit. Discussion in this thread:...
Showing results 1 to 25 of 476
 


 
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