PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
Search: Posts Made By: infrequentflyer789
Showing results 1 to 20 of 20
Search took 0.00 seconds.
Forum: Tech Log
14th Jun 2011, 21:42
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Nice one, fascinating old thread. This post...

Nice one, fascinating old thread. This post http://www.pprune.org/tech-log/173167-can-airliners-recover-stall.html#post1878088 is particularly notable:

One particularly prescient poster, or an...
Forum: Tech Log
14th Jun 2011, 00:02
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Unhappy To me, the one difference in FBW "philosophy"...

To me, the one difference in FBW "philosophy" between A and B is hard vs soft limits / protections. "Rules" is not the difference - the rules are there in both cases.

Approach the limits in A and...
Forum: Tech Log
12th Jun 2011, 23:47
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

we don't know yet, but I am sure this vital...

we don't know yet, but I am sure this vital parameter is recorded in the FDR data and will be in the next report - if not, I suggest it's a major regulatory failure that you should take up with the...
Forum: Tech Log
12th Jun 2011, 23:02
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Actually, both are "true" in that both "this is a...

Actually, both are "true" in that both "this is a stall" and "at no point is the word..." have been reported in different media "leaks" from teh investigation.

So, one can resonably conclude that...
Forum: Tech Log
10th Jun 2011, 12:03
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

I would perhaps also add "they lost attitude...

I would perhaps also add "they lost attitude indications and thought they were diving" (somatogravic illusion etc.)

I think it is low probability, but PF displays aren't in the flight data, and...
Forum: Tech Log
8th Jun 2011, 01:04
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Yeah, you aren't the only one who doesn't...

Yeah, you aren't the only one who doesn't understand this bit of logic. Not sure if the fault is in the ADIRU logic or the stall-warning though - or maybe (I think the stall warning is not from...
Forum: Tech Log
5th Jun 2011, 22:27
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

There may be less difference than you think, and...

There may be less difference than you think, and may be down to semantics and/or translation. Your first bolded statement was unanimously agreed by A & B reps (and test pilots). The second, from...
Forum: Tech Log
5th Jun 2011, 16:39
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

If they didn't think it could stall, why did they...

If they didn't think it could stall, why did they build in a stall warning and stick shaker ? Why did they document it ? Why did they publish info on stall recovery procedures ?

Airbus knows,...
Forum: Tech Log
5th Jun 2011, 01:17
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

It is known, and the answer is that yes it does...

It is known, and the answer is that yes it does happen on other types and with other pitot types on the buses. It probably isn't always reported, but when it is, the reports are there to find. ...
Forum: Tech Log
3rd Jun 2011, 08:06
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

No, the AB statement was that no modifications...

No, the AB statement was that no modifications (other than previously advised) were required yet - ie. the further investigation of the data may result in modification requirements



It isn't...
Forum: Tech Log
29th May 2011, 23:56
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

The way I read the BEA info, the nose was raised...

The way I read the BEA info, the nose was raised more than "a little" and pitch much more than 5 degrees.

But on the C/L, buried in a postscript to a post a few pages back by Hyperveloce...
Forum: Tech Log
29th May 2011, 23:30
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Certainly not in the real aircraft. The sim is...

Certainly not in the real aircraft. The sim is likely accurate enough that you will need the stick forward to recover from stall (not approach to stall).

See post 498,...
Forum: Tech Log
29th May 2011, 08:38
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

I think roll drops to direct in alternate law,...

I think roll drops to direct in alternate law, but it is still a good question - if the aircraft was level it should stay that way. BEA don't indicate the cause of the first left roll - maybe...
Forum: Tech Log
28th May 2011, 21:38
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Which is what it does, and what happened. With...

Which is what it does, and what happened. With the addition that because speed is known-bad the speed-based protections drop out. And control gets handed to the pilots - because HAL isn't sure what...
Forum: Tech Log
28th May 2011, 21:22
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Mixing up autopilot and protections/laws there. ...

Mixing up autopilot and protections/laws there. As I understand it A/P can be re-engaged in alternate law (once you've recovered stall), but normal law will not re-engage for the rest of the flight,...
Forum: Tech Log
28th May 2011, 21:20
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Agreed, it's a nasty pattern developing, and...

Agreed, it's a nasty pattern developing, and nothing to do with A vs B or FBW (everything to do with higher-level automation though).

However, it isn't at all clear that 447 fits this pattern. ...
Forum: Tech Log
27th May 2011, 14:04
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Press can't read English or French...

The rubbish has started in the "press" - front of dailymail website (my bold):

So, no one (as there's only one pilot, singular) at the controls, heavy turbulence, engine failure. :ugh:
Forum: Tech Log
27th May 2011, 13:54
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Afraid you are crediting me with more detailed...

Afraid you are crediting me with more detailed knowledge than I actually have.

Short answer - I don't know, but it is one of the questions on my mind too...
I strongly suspect that airspeed is...
Forum: Tech Log
27th May 2011, 13:40
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

Don't know yet - very likely will be part of the...

Don't know yet - very likely will be part of the detailed technical investigation.

Some possibilities (from my basic understanding of the engineering)

a) because auto-trim has been lost, it's...
Forum: Tech Log
27th May 2011, 12:57
Replies: 2,070
Views: 616,543
Posted By infrequentflyer789

It's auto-trim until it's not - that function/law...

It's auto-trim until it's not - that function/law can drop out automatically (when HAL/George gives up) and it did at Perpignan.

737 has auto-trim too - again, it can drop out automatically, after...
Showing results 1 to 20 of 20


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.