Search found 8672 matches

by WIederling
Sun Sep 15, 2019 9:44 am
Forum: Non-Aviation
Topic: More Kavanaugh Allegations
Replies: 6
Views: 153

Re: More Kavanaugh Allegations

I'm a leftie and not a fan of Kavanaugh, but I have to say that women who are proven to have falsely accused a man of sexual assault should end up in Jail. For a long time. These accusations are getting out of hand, with more and more being proven false and the women are getting off without any pun...

Jump to post
by WIederling
Sat Sep 14, 2019 10:19 am
Forum: Technical/Operations
Topic: Crashworthiness of modern airliners vs old
Replies: 29
Views: 2610

Re: Crashworthiness of modern airliners vs old

I believe the BA 777 crash in London did well from a stronger floor and passenger seats. An older jet might’ve broken in pieces where the 777 held together. I’m vaguely going by memory when I read somewhere and I just can’t recall it sorry. The same largely could be said for the Asiana 777, which w...

Jump to post
by WIederling
Sat Sep 14, 2019 9:31 am
Forum: Civil Aviation
Topic: 787 Trouble in the Future?
Replies: 70
Views: 15755

Re: 787 trouble in the future

Boeing does have a modular pylon on the 787 and we did see a mini NEO program on the 787 already with the Trent 1000TEN which had 90% of the internals changed. Engine swap out went from "couple of hours, independent of a manufacturer change or not" to change everything as far back as the ...

Jump to post
by WIederling
Sat Sep 14, 2019 9:04 am
Forum: Civil Aviation
Topic: A320neo Family 'Excessive Pitch' Issue Thread
Replies: 133
Views: 30961

Re: A320neo Family 'Excessive Pitch' Issue Thread

Although it's obviously not MCAS 1.0 bad it seems the NEO shares similar pitch issues as the MAX when it comes to strapping these larger, more powerful powerplants to an older airframe design. Seems like LH would do better to mandate more forward loading of baggage to protect the CG envelope rather...

Jump to post
by WIederling
Sat Sep 14, 2019 6:53 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I really wonder, why the FAA did not insist on test flights with the MCAS switched off too. Schrödingers 737 cat: If you don't look the cat is still alive. It is the way the MAX certification had been handled initially. Why change MoO? another thing: why are posters so agitated about retaliation? T...

Jump to post
by WIederling
Fri Sep 13, 2019 2:09 pm
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

FatCat wrote:
WIederling wrote:
copy: like Airbus did with the A330 from the 787 (


Something's not sounding right in this statement: wasn't the A330 launched way before the B787?

:-) attentive, I see.

Jump to post
by WIederling
Fri Sep 13, 2019 12:52 pm
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

All Airbus Cabin Flex A321neos (denoted by A321neo-2**NX instead of A321neo-2**N) have the MTOW 97t so in terms of structure the A321LR is already the base variant. The only difference is the additional plumbing for the 3rd ACT on the LR (the normal A321neo can only go up to 2 ACTs). Since Airbus p...

Jump to post
by WIederling
Fri Sep 13, 2019 12:29 pm
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

That article states: A321 long-term future depends on Boeing’s decision over the New Midmarket Airplane. No the New Boeing has nothing to do with the A321 Except in Airbus's eyes. The 797 will be it's OWN airplane with it's OWN mission. Airbus can choose tp copy ... copy: like Airbus did with the A...

Jump to post
by WIederling
Fri Sep 13, 2019 12:17 pm
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

JonesNL wrote:
They are doing really well, but there is room for improvement...


Could you point out some major ( or smaller ) inefficiencies ?

Any low hanging "duh, simple .. " fruit?

Jump to post
by WIederling
Fri Sep 13, 2019 12:14 pm
Forum: Military Aviation & Space Flight
Topic: Do nuclear aircraft carriers transit the Panama Canal ?
Replies: 9
Views: 1121

Re: Do nuclear aircraft carriers transit the Panama Canal ?

Yes, the Panama Canal was expanded, but the biggest issue is that there is a bottleneck at the Culevra Cut. The Cut is only wide enough for ships that are close to or at the Panamax dimensions to go by itself, i.e. ships going the other way must wait for the ship to pass (or the ship has to sit whi...

Jump to post
by WIederling
Fri Sep 13, 2019 12:12 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Is it necessary? If we listen to Airbus and a lot of posters on this forum the quality of the training is not so good, so mandated sim training should be a good thing for general aviation safety. I'd expect at least some sim training for the see saw technique of "overwhelming" the very hi...

Jump to post
by WIederling
Fri Sep 13, 2019 12:08 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

morrisond wrote:
They did right after Lionair.

MCAS was mentioned.
( And that nice "RTFM" from Boeing. Daft third worlders no match to pilots at home.)
The wider implications such as limited trim wheel effectiveness, issues in data processing, ... were not known.

Jump to post
by WIederling
Fri Sep 13, 2019 8:41 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

https://www.moonofalabama.org/ currently on top of the page else go to "September 12, 2019 Boeing Foresees Return Of The 737 MAX In November - But Not Everywhere" nice collection of media transpiration. they come to the tentative conclusion that currently a staged return to service seems t...

Jump to post
by WIederling
Fri Sep 13, 2019 8:31 am
Forum: Civil Aviation
Topic: Coffee Spill Forced A330 Diversion
Replies: 67
Views: 11567

Re: Coffee Spill Forced A330 Diversion

Would it not be beyond the wit of Airbus to incorporate a flexible size cup holder that can be racheted to suit the actual cup size? Everything has its prize. You can buy right sized (and branded) mugs in the Airbus Shop annex to the delivery center :-)))))))). If your Airline is too cheap to spend...

Jump to post
by WIederling
Fri Sep 13, 2019 8:23 am
Forum: Civil Aviation
Topic: CASM numbers
Replies: 27
Views: 2708

Re: CASM numbers

Cost per Available Mile in cents 2nd qtr 2019 American 14.94 Delta 14.51 United 13.56 Southwest 12.36 Southwest's CASM number of 12.36 cents (second 3 months of 2019) is probably the most useful since their markets and equipment is very similar. The legacy carriers would be much more helpful if the...

Jump to post
by WIederling
Fri Sep 13, 2019 8:09 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Several people have discussed whether the MCAS could have been disabled by the pilots, and what actions would have had this effect/the consequences of taking this action. What I do not understand, is how any of this is relevant given that the pilots/airlines apparently did not know MCAS existed. An...

Jump to post
by WIederling
Fri Sep 13, 2019 7:20 am
Forum: Military Aviation & Space Flight
Topic: Do nuclear aircraft carriers transit the Panama Canal ?
Replies: 9
Views: 1121

Re: Do nuclear aircraft carriers transit the Panama Canal ?

I imagine the smaller amphibious carriers can transit the canal The Wasps can, but need to fold the elevators up before. The America class also lives up to Panamax, but would also need to fold the elevators . If that is technically not an issue ... And anyway: Wasn't the Panama Canal infrastructure...

Jump to post
by WIederling
Fri Sep 13, 2019 7:13 am
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

Given the production issues going on at the Airbus factories, the profit margin on a basic low weight A320neo is small if not nonexistent. Airbus needs airlines to upgrade to more expensive A321 versions to make the A320neo family more profitable. However it is important to have a basic stripped do...

Jump to post
by WIederling
Thu Sep 12, 2019 9:15 pm
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

Paper derates are one thing. Having extra equipment built in that adds to maintenance cost is another. The market for the A321 is large enough for both ends of marketing line to be maintained. If anything, the middle option will disappear. In the future customers wanting extra range are likely to o...

Jump to post
by WIederling
Thu Sep 12, 2019 5:10 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 445
Views: 85720

Re: 787 vs A350 range

tommy1808 wrote:
I don't think that hauling ~3% more cabin floor area around for ~3% more fuelburn gives you lower CASM....

787 math is different. ( Like "German Physics" :-))

What is the expectable delta from 789 to 7810 ( how much more drag has the -10 ? )

Jump to post
by WIederling
Thu Sep 12, 2019 4:30 pm
Forum: Civil Aviation
Topic: Should Airbus standarize A321NEO/LR/XLR into a single version.
Replies: 46
Views: 5944

Re: Should Airbus standarize A321NEO/LR/XLR into a single version.

The extra weight and expense is not needed for most routes flown by variants of the A321. Even if the the ACT's can be removed, the extra fuel system plumbing associated with them is not. They have higher gross weights, so they have to pay higher landing fees. Can always do paper derates, a lot mor...

Jump to post
by WIederling
Thu Sep 12, 2019 12:29 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Where did he say those? At an investors conference. They are just giving positive messages to keep the share price level. Nothing serious. On the other hand,EASA repeated their 4 points after 6 months. Any progress there? Ah, so you think the CEO lied to investors in hopes the lie would not be disc...

Jump to post
by WIederling
Thu Sep 12, 2019 12:04 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

I think the crackeed wing ribs were not related to the final load test issue. The testing that should have picked it up was the fatigue testing - not the ultimate strength testing. Yup. my understanding too. But the fatigue test would not have exposed it either as it does not do temp cycles that we...

Jump to post
by WIederling
Thu Sep 12, 2019 11:53 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Note that a composite wing will react differently than a metal wing at ultimate load. So Boeing can not do what Airbus did with he A380. Recall that the A380 experienced a failure. The metal went beyond yield and broke. With the 777x wing, there is really no yield point and until you hear fiber bre...

Jump to post
by WIederling
Thu Sep 12, 2019 11:43 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Note that a composite wing will react differently than a metal wing at ultimate load. So Boeing can not do what Airbus did with he A380. Recall that the A380 experienced a failure. The metal went beyond yield and broke. With the 777x wing, there is really no yield point and until you hear fiber bre...

Jump to post
by WIederling
Thu Sep 12, 2019 6:47 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Load up the Euros in a Max, do a few Tex Johnson barrel rolls with the electronics on then off. If the plane doesn't fall out of the sky, they should be good to go :) Faulty thinking. Barrel rolls don't expose much in view of problematic flight envelope fringe behavior. The keyword here is "su...

Jump to post
by WIederling
Wed Sep 11, 2019 7:22 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Do they even need to repeat the test if they realize it was just a latch that failed? Not if they can use calculations/computer modeling to show that it will pass with the fix. YES -- If you can show that the failure was within error margins of the target simulation. If things break far below or ab...

Jump to post
by WIederling
Wed Sep 11, 2019 6:44 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Revelation wrote:
Yet it's open season on Boeing, so fire away!


No need self destruct has been initiated.

NSA was a mirage not a product.

Jump to post
by WIederling
Wed Sep 11, 2019 6:19 pm
Forum: Technical/Operations
Topic: Crashworthiness of modern airliners vs old
Replies: 29
Views: 2610

Re: Crashworthiness of modern airliners vs old

I can vaguely recall that EASA (or some other) required changes with the 744 due to one cable raceway being considered a single point of failure if the floor between upper and lower deck gave in, and that was too much for grandfathering. But again, that is blurry pre-internet memory..... Best regar...

Jump to post
by WIederling
Wed Sep 11, 2019 6:11 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The fact that the MCAS design was totally botched does not undo the market verdict that the MAX was the preferred product. Preferred what other product? * A320 * NSA or a * MAX with sane MCAS. :-) ( note: customers were not informed about the deficiencies though Boeing knew about the circumstances ...

Jump to post
by WIederling
Wed Sep 11, 2019 11:46 am
Forum: Non-Aviation
Topic: Rep. Ilhan Omar Named in Divorce Papers as the "Other Woman".
Replies: 49
Views: 1779

Re: Rep. Ilhan Omar Named in Divorce Papers as the "Other Woman".

This didn't get a fraction of the media coverage a Sarah Palin divorce is getting. Probably because she's not an illiterate backwoods trash weasel who pushes her christian values narrative 24/7 while one daughter whores it up so much she winds up on Teen Mom, while her felon son beats the crap out ...

Jump to post
by WIederling
Wed Sep 11, 2019 11:41 am
Forum: Technical/Operations
Topic: Crashworthiness of modern airliners vs old
Replies: 29
Views: 2610

Re: Crashworthiness of modern airliners vs old

The fuselage hasn't changed much. The interiors are safer(reasonably) with 16G seats, the flammability reduction of the components. Some forward facing seats now have shoulder harnesses and airbags. 9g versus 16g ( or is it 14g?) fuselage for newer ( than grandfathered 737 ) designs. ( IMU this and...

Jump to post
by WIederling
Wed Sep 11, 2019 11:29 am
Forum: Non-Aviation
Topic: Trump fires Bolton as National Security Advisor
Replies: 48
Views: 1536

Re: Trump fires Bolton as National Security Advisor

ER757 wrote:
Good riddance to this warmongering a-hole. .


Wait for his replacement ( while biting your nails).
Bolton's deputy ( stepping up interim? ) isn't any different.

Jump to post
by WIederling
Wed Sep 11, 2019 11:20 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The fact that Boeing had stated multiple times that it activates in rarely entered parts of the flight envelope contradicts your assertion that the most susceptible region is just after flaps retraction. This would be a very frequently entered part of the envelope. Pretty much 100%. but not coupled...

Jump to post
by WIederling
Wed Sep 11, 2019 10:51 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Quote from them : " the testing issue occured during the final minutes of the test, at approximately 99% of the final test loads, and Involved a depressurization of the aft fuselage" why would this explosive decompression be limited to the rear fuselage? no wall in the cabin and the floor...

Jump to post
by WIederling
Wed Sep 11, 2019 10:44 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I think whether or not you call it anti stall is moot (and may well be debated in court). A rose by any other name :-) I do balk at the high speed thingy. This backstory appears to be more of a detraction than anything else. Higher speeds provide more lift from the same AoA. The region most suscept...

Jump to post
by WIederling
Wed Sep 11, 2019 6:41 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

EASA is not entangled in the Boeing reality distortion field. They see a nudy and talk about it.:-) If sovereign aviation certificating authorities are now also getting confused about the actual technical issues involved then this whole thing could get way uglier than it already is. Perhaps it was ...

Jump to post
by WIederling
Tue Sep 10, 2019 7:33 pm
Forum: Military Aviation & Space Flight
Topic: 777 to be blown up soon
Replies: 4
Views: 1798

Re: 777 to be blown up soon

na wrote:
This is about a civilian airliner and no matter that the US Army blows it up its still a CIVILIAN plane, so why has this Topic been moved to the Military Forum?


Not a mod.

But what task is set with blowing it up?
Is it civil interest ( FAA, NTSB, ... ) or is it military research project?

Jump to post
by WIederling
Tue Sep 10, 2019 7:30 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

You are wrong on the 737 has a tendency to pitch up. The controls just get lighter than allowed by regulation - that is a big difference. no read the EASA documents are already postet here in that thread its written word by word "... has a tendency to pitch up..." and "... has a tend...

Jump to post
by WIederling
Tue Sep 10, 2019 7:18 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Quote from them : " the testing issue occured during the final minutes of the test, at approximately 99% of the final test loads, and Involved a depressurization of the aft fuselage" why would this explosive decompression be limited to the rear fuselage? no wall in the cabin and the floor...

Jump to post
by WIederling
Tue Sep 10, 2019 6:53 pm
Forum: Technical/Operations
Topic: Crashworthiness of modern airliners vs old
Replies: 29
Views: 2610

Re: Crashworthiness of modern airliners vs old

A320s ( and 321s ) have proved extremely resilient in two very high profile incidents, US Airways miracle on the Hudson and the recent Ural Airways birdstrike landing. Both frames stayed intact. The 738's seem to have a lot of incidents of fuselage breaks just after the wings in numerous landing in...

Jump to post
by WIederling
Tue Sep 10, 2019 3:02 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Is it academically correct to speak of anything over 100%? I thought the percent scale ends at 100. The test is for a load that is 1.5 times some other load or something like that? "percent" is normalization to some reference value given in 1/100th of that reference value. Nothing says yo...

Jump to post
by WIederling
Tue Sep 10, 2019 2:49 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

I can’t seem to recall that Boeing has blamed EASA for the MAX still being grounded? They have not sent their fix to approval as far as I know Obviously they would not try that. But who inserts the funny rumors "ready to go, just EASA hanging back" into the discussions ( media, specialist...

Jump to post
by WIederling
Tue Sep 10, 2019 10:26 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

I can’t seem to recall that Boeing has blamed EASA for the MAX still being grounded? They have not sent their fix to approval as far as I know Obviously they would not try that. But who inserts the funny rumors "ready to go, just EASA hanging back" into the discussions ( media, specialist...

Jump to post
by WIederling
Tue Sep 10, 2019 7:53 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 883
Views: 206469

Re: Boeing 777X Testing Thread - 2019

Interesting this discussion. A cargo door has blown out on the 777x static test frame. Boeing has stopped the testing to research whet has happened. Nothing is known, but one thing. This will not have any influence on the test flight and delivery schedule of the 777-9. And some posters here take Bo...

Jump to post
by WIederling
Mon Sep 09, 2019 9:09 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3630
Views: 471574

Re: Boeing 737MAX Grounded Worldwide Q3 2019

cledaybuck wrote:
uta999 wrote:
China's speed in acting on the MAX proved to be the right call. There is no other way to view this. The FAA made the wrong call in so many ways.

So did EASA make the wrong call by not grounding the plane until 2 days after China did?


Still waiting politely for the FAA to "see the light"

Jump to post
by WIederling
Mon Sep 09, 2019 5:31 pm
Forum: Technical/Operations
Topic: Telescoping Control Columns
Replies: 68
Views: 3249

Re: Telescoping Control Columns

i know that in some military planes flight computers may use any control surface for the commanded action, sometimes there are not classic control surfaces (x tail, canards etc). lets move back to the pf monitoring, because he can do exactly the same actions as you, and you can monitor him with the...

Jump to post
by WIederling
Mon Sep 09, 2019 4:49 pm
Forum: Technical/Operations
Topic: Telescoping Control Columns
Replies: 68
Views: 3249

Re: Telescoping Control Columns

for example, i have no problem to use car with "autopilot" feature in the near future, but i will never buy car that is designed in a way, that steering wheel is not moving when computer controls it. no way, bad design Autopilot computer also controls acceleration and braking. Would you t...

Jump to post
by WIederling
Mon Sep 09, 2019 4:31 pm
Forum: Technical/Operations
Topic: Telescoping Control Columns
Replies: 68
Views: 3249

Re: Telescoping Control Columns

for example, i have no problem to use car with "autopilot" feature in the near future, but i will never buy car that is designed in a way, that steering wheel is not moving when computer controls it. no way, bad design bad design? no Moving wheel is "A Stoker on a Diesel engine"...

Jump to post
by WIederling
Mon Sep 09, 2019 3:53 pm
Forum: Technical/Operations
Topic: Telescoping Control Columns
Replies: 68
Views: 3249

Re: Telescoping Control Columns

.......... but i still think that to see and feel what exactly is the second pilot doing, by simply observing the movement of the stick or following it by touch can be useful. typically when dealing with control problems, bad weather etc. isn't this ignoring the paradigm disparity of flying the pla...

Jump to post