Search found 10037 matches

by WIederling
Wed Jun 23, 2021 1:46 pm
Forum: Civil Aviation
Topic: Airbus A321XLR Development Production Testing Thread - 2021
Replies: 189
Views: 50508

Re: Airbus A321XLR Development Production Testing Thread - 2021

Article about the safety concerns raised by Boeing on the vunerability of the new rear tank for outside fire. https://thekaplanianreport.files.wordpress.com/2021/03/airbus-rear-tank-diagram.jpg?w=397&h=518 https://kaplanianreport.com/ The more skilled people that take a look at new aircraft des...

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by WIederling
Wed Jun 23, 2021 10:58 am
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

The 737’s wing is slightly larger than the A320neo’s wing. The A321neo has a slight area increase (although still around size of 737 wing at most) but has things like double slotted flaps, not found on the MAX 10, to help low speed lift. Both (MAX 10 and A321) could really benefit from new larger w...

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by WIederling
Wed Jun 23, 2021 7:21 am
Forum: Military Aviation & Space Flight
Topic: New Chinese Tiangong Space Station
Replies: 37
Views: 6517

Re: New Chinese Tiangong Space Station

True, although ESA is very much at the mercy of its member states. If one of them wakes up one day and decides that the friendship with China is now cancelled, there's little that ESA can do. Not a real danger. The US is not member to ESA. ESA generally speaking, acts with pragmatism rather than pu...

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by WIederling
Wed Jun 23, 2021 7:07 am
Forum: Non-Aviation
Topic: China and biological warfare story
Replies: 170
Views: 14339

Re: China and biological warfare story

Science isn’t done in tabloid papers, it isn’t done with emotion and it isn’t done to match election cycles or news cycles. It is deliberately slow, measured and unbiased to find the truth. Because investigation will take decades and answer might not be recoverable, we should all sit at the ground ...

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by WIederling
Tue Jun 22, 2021 12:38 pm
Forum: Non-Aviation
Topic: China and biological warfare story
Replies: 170
Views: 14339

Re: China and biological warfare story

Francoflier wrote:
How do you weaponise a virus without it eventually infecting your own population?

One of the defining feature of a weapon is that you can aim it.


Ethnic selectivity. That would be a self seeking weapon.

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by WIederling
Mon Jun 21, 2021 3:13 pm
Forum: Civil Aviation
Topic: 737 with new wing, landing gear potential
Replies: 88
Views: 19020

Re: 737 with new wing, landing gear potential

Just ahead of the A320 certification the minimum height and the conditions under which to achieve those was increased. you may want to look into this document: https://www.smartcockpit.com/docs/Getting_to_Grips_With_Aircraft_Performance.pdf ~p53 grandfather clause applies for the NG and thus the MA...

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by WIederling
Mon Jun 21, 2021 2:49 pm
Forum: Civil Aviation
Topic: 737 with new wing, landing gear potential
Replies: 88
Views: 19020

Re: 737 with new wing, landing gear potential

Can you prove that the 737MAX conforms to the same obstacle clearance and single engine out requirements the A320 is certified for? Yes it is. The single engine out requirements are the same- the plane must be able to take off and fly with one engine. I don’t know what you mean about obstacle clear...

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by WIederling
Mon Jun 21, 2021 1:55 pm
Forum: Civil Aviation
Topic: 737 with new wing, landing gear potential
Replies: 88
Views: 19020

Re: 737 with new wing, landing gear potential

[Can you please list the “bypassed unmarked certification requirements”. Can you name a few CFRs that the 737 bypassed or are your comment general hyperbole? There is a "deforming" copy error in your question. Can you prove that the 737MAX conforms to the same obstacle clearance and singl...

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by WIederling
Mon Jun 21, 2021 1:45 pm
Forum: Civil Aviation
Topic: Airbus A321XLR Development Production Testing Thread - 2021
Replies: 189
Views: 50508

Re: Airbus A321XLR Development Production Testing Thread - 2021

I wonder about the center of gravity implications of this new tank concept. I guess it will be burned off first, does anyone know the fuel schedule? It is possible that one of the reasons for new flaps is to move center of lift rearward in flaps extended configuration, especially at higher angle of...

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by WIederling
Mon Jun 21, 2021 1:24 pm
Forum: Civil Aviation
Topic: 737 with new wing, landing gear potential
Replies: 88
Views: 19020

Re: 737 with new wing, landing gear potential

What it really needs is a wider fuselage in addition so so many other things as you mentioned. As long as Boeing relies on the 707 specs it'll never see success over Airbus. And what 707 specs might that be, the upper fuselage width?, I guess it goes to show what a fantastic jet was built by Boeing...

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by WIederling
Mon Jun 21, 2021 11:14 am
Forum: Military Aviation & Space Flight
Topic: New Chinese Tiangong Space Station
Replies: 37
Views: 6517

Re: New Chinese Tiangong Space Station

ESA is already doing joint stuff with China on space. It wouldn't be much of a step for them to send people to a Chinese station once it's properly operational. True, although ESA is very much at the mercy of its member states. If one of them wakes up one day and decides that the friendship with Ch...

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by WIederling
Mon Jun 21, 2021 9:34 am
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

Avgeek21 wrote:
MAX OEW weights seem to now be well beyond comparable A320 numbers ( where the last published ones had A3 and NG matched. )


Sorry, in English this means? Lot’s of us are non native speakers.


me neither :-)

In short: the MAX has gained quite some weight. :-)

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by WIederling
Mon Jun 21, 2021 7:33 am
Forum: Civil Aviation
Topic: Updated: Reuters: Airbus launches A350 freighter
Replies: 1829
Views: 308699

Re: A350F. Airbus looking to launch: Looking for customers

The current -1000 has OEW around 155 tons. More like 150 for the current builds. Turning a 77W into a ERSF takes out 15 tons (https://www.iai.co.il/drupal/sites/default/files/2019-12/777-300ERSF%20Brochure.pdf) and that still hauls the structure for windows around and isn´t shortened by a few meter...

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by WIederling
Mon Jun 21, 2021 7:13 am
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

When comparing A320CEO/NEO and 737NG/MAX its good to keep in mind that the '37 does have the advantage of a newer wing that is more efficient (generates more lift, holds more fuel, etc..)... I know, I know, you want me to quantify it... I can't. Guilty as charged. But it is fair to say the -37 need...

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by WIederling
Sun Jun 20, 2021 5:28 pm
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

Telescopic gear and semi levered gear are not the same thing. However, I don't think its as expensive as the other guy says it is. You are correct, even I described it incorrectly as a telescoping gear.... Semi-Levered is more correct. "trailing link" is the generic name: http://www.b737....

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by WIederling
Sun Jun 20, 2021 4:10 pm
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

flyingclrs727 wrote:
Boeing already had experience developing a levered landing gear for the 777-300ER.


They don't have anything in common.
.. well beyond some wheels attached and an oleo leg.

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by WIederling
Sun Jun 20, 2021 12:55 pm
Forum: Military Aviation & Space Flight
Topic: New Chinese Tiangong Space Station
Replies: 37
Views: 6517

Re: New Chinese Tiangong Space Station

So the solution was many but smaller engines which were also more efficient that anything else, anywhere, for over 20 years, however quality and reliability of the control systems and plumbing for 30 of them was what killed the N1. Not throwing shade here, this was over 50 years ago after all. And ...

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by WIederling
Sun Jun 20, 2021 11:37 am
Forum: Civil Aviation
Topic: Passenger converted bomber aircraft in civilian service - Stories, facts, interiors?
Replies: 92
Views: 14690

Re: Passenger converted bomber aircraft in civilian service - Stories, facts, interiors?

On the original topic of converted bombers, there is an old James Garner-Natalie Wood movie, Cash McCall (1960), that featured a B-25 converted into an executive plane. reminds me seeing some converted early British jet fighter to business transport: http://www.vintagewings.ca/VintageNews/Stories/t...

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by WIederling
Sun Jun 20, 2021 11:15 am
Forum: Military Aviation & Space Flight
Topic: New Chinese Tiangong Space Station
Replies: 37
Views: 6517

Re: New Chinese Tiangong Space Station

They aren’t looking for a partner, they’re looking for someone with the knowledge and experience to learn from….that they can promptly abandon when the time is right. Amusing. Initially coop with Soviets/Russia was imho linked to their more expansive experience with ops and resulting contingencies ...

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by WIederling
Sun Jun 20, 2021 11:08 am
Forum: Military Aviation & Space Flight
Topic: Another Boeing-Airbus tanker war is coming soon, KC-Y
Replies: 220
Views: 21185

Re: Another Boeing-Airbus tanker war is coming soon, KC-Y

744SPX wrote:
... the plane-Jane KC-767 that works so well for Japan and Italy.


Does it? Really?

IMU they have it and have to live with the purchase :-?

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by WIederling
Sun Jun 20, 2021 10:40 am
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

A -9 with -10 landing gear might be interesting. It would allow for better field performance than the current -900. It might allow WN to fly to any airport from MDW with 200 passengers to any airport where they operate in the contiguous United States. It would allow upgauging some west coast to Haw...

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by WIederling
Fri Jun 18, 2021 8:37 am
Forum: Military Aviation & Space Flight
Topic: Space debris removing mission
Replies: 5
Views: 1127

Re: Space debris removing mission

I know about work at DLR and some Aussie university.
Mostly LASER based ablation decell.

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by WIederling
Fri Jun 18, 2021 8:35 am
Forum: Civil Aviation
Topic: Boeing MAX-10 First Flight Thread
Replies: 227
Views: 53347

Re: Boeing MAX-10 First Flight Thread

Noshow wrote:
It's good to see the MAX back in the business. The -10 could be one of the more promising variants.


A good replacement for the -9. But does it go beyond that?

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by WIederling
Tue Jun 15, 2021 6:52 am
Forum: Non-Aviation
Topic: EU Won't Call Out China On Rights Abuses
Replies: 82
Views: 3465

Re: EU Won't Call Out China On Rights Abuses

So anytime we help Europe, it's because it's in our interest but anytime there's a problem outside of Europe, it's not Europe's problem. Got it! hammer in hand thing. The US hammer is deadly force and corruption. ( and they have a thing for unpremeditated use of same ) The EU hammer is soft power. ...

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by WIederling
Tue Jun 15, 2021 6:46 am
Forum: Military Aviation & Space Flight
Topic: Space junk
Replies: 26
Views: 3153

Re: Space junk

Where actually is the difference between 10k pieces of space junk and commercial system consisting of the same number of independently orbiting items? Working satellites, assuming they have some means to change their orbit, can avoid collisions and can be deorbited in a controlled fashion. That mak...

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by WIederling
Mon Jun 14, 2021 4:48 pm
Forum: Military Aviation & Space Flight
Topic: Space junk
Replies: 26
Views: 3153

Re: Space junk

Where actually is the difference between 10k pieces of space junk and
commercial system consisting of the same number of independently orbiting items?

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by WIederling
Mon Jun 14, 2021 6:46 am
Forum: Civil Aviation
Topic: Airbus focus is on evolving existing jet models, CEO says
Replies: 129
Views: 18642

Re: Airbus focus is on evolving existing jet models, CEO says

It would be utterly illogical for Airbus to strike first with an all-new offering in that segment, when they already have an uncontested product that is selling fast, to everything from global hub carriers to LoCos. culture clash. Having your customer over a barrel and and have him feel it in publi...

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by WIederling
Sun Jun 13, 2021 4:33 pm
Forum: Civil Aviation
Topic: Airbus focus is on evolving existing jet models, CEO says
Replies: 129
Views: 18642

Re: Airbus focus is on evolving existing jet models, CEO says

It would be utterly illogical for Airbus to strike first with an all-new offering in that segment, when they already have an uncontested product that is selling fast, to everything from global hub carriers to LoCos. culture clash. Having your customer over a barrel and and have him feel it in publi...

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by WIederling
Sun Jun 13, 2021 1:08 pm
Forum: Non-Aviation
Topic: Trump's Administration was the Deep State
Replies: 40
Views: 2584

Re: Trump's Administration was the Deep State

Trump and William Barr went out and got subpoena's from private companies to run surveillance on Political Enemies, and then got gag orders to hide keep the companies from informing the private citizens that their data was being monitored. This was done at least as far back as Bush43. ( illegal acc...

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by WIederling
Sun Jun 13, 2021 12:11 pm
Forum: Non-Aviation
Topic: Operation Trojan Shield
Replies: 15
Views: 1528

Re: Operation Trojan Shield

The interesting thing about this is that it's going to undermine criminals' confidence in ANY encryption service. No doubt thousands of mobile phones have been quickly dumped. Not a new feeling. Remember that Swiss "trojan" encryption company subverted over decades by US and German intell...

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by WIederling
Sun Jun 13, 2021 12:04 pm
Forum: Non-Aviation
Topic: EU Won't Call Out China On Rights Abuses
Replies: 82
Views: 3465

Re: EU Won't Call Out China On Rights Abuses

Trump's years in power have been incredibly destructive for the relationships with Europe, that in return isn't that willing to follow USA blindly for a little bit of room under the umbrella any more. Don't forget, that the US had to deal with the likes of Chirac, Macron, Merkel, Schroeder, Juncker...

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by WIederling
Fri Jun 11, 2021 1:09 pm
Forum: Technical/Operations
Topic: Is the UDF Engine Back from the Dead?
Replies: 41
Views: 9703

Re: Is the UDF Engine Back from the Dead?

Higher RPM. That being said, it isn't that much higher. A turboprop prop maxes out under 2000rpm. A turbofan fan spins at around 3000rpm. Not quite that much. The GE36 UDF had a fan blade tip speed of 780 feet per second (238 meters per second) at cruise and 850 fps (259 mps) at takeoff ( UDF desig...

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by WIederling
Fri Jun 11, 2021 1:01 pm
Forum: Civil Aviation
Topic: Updated: Reuters: Airbus launches A350 freighter
Replies: 1829
Views: 308699

Re: A350F. Airbus looking to launch: Looking for customers

They are out of luck till they have a "777X" certified to tack an "F" on. The view to its future is diffuse :-) Why can’t they launch it without certification? What is the difference between any other program that launches with multiple variants. You bring 777-9 to market then b...

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by WIederling
Fri Jun 11, 2021 7:26 am
Forum: Civil Aviation
Topic: Updated: Reuters: Airbus launches A350 freighter
Replies: 1829
Views: 308699

Re: A350F. Airbus looking to launch: Looking for customers

I just hope Boeing is marketing and pushing as aggressively with their own 777XF. I believe they must protect freight market at all costs. Narrow body market is not currently their turf. No need to forgo widebody/freight market They are out of luck till they have a "777X" certified to tac...

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by WIederling
Fri Jun 11, 2021 7:18 am
Forum: Non-Aviation
Topic: Louie Gohmert's idea to fix climate
Replies: 29
Views: 1809

Re: Louie Gohmert's idea to fix climate

I believe Magneto once attempted to shift the Earth's axis - the X-Men stopped him from doing that. I'll give him a pass on the BLM acronym, but can't help if that was tongue-in-cheek on his part. Jules Verne described it better than 130 years ago. slight computational error nixed the project outco...

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by WIederling
Sun Jun 06, 2021 11:11 am
Forum: Civil Aviation
Topic: New A330 Wingtips?
Replies: 51
Views: 11169

Re: New A330 Wingtips?

smartplane wrote:
Hopefully all involved have rock solid IP protection.


About as much as Glatzer's APB winglets.

published idea and some prior art afair from before 2000.

Feathered tips are an old (bionics copy) idea.
Making them in a cost effective way may have been what that design style back.?

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by WIederling
Sat Jun 05, 2021 8:49 am
Forum: Non-Aviation
Topic: China and biological warfare story
Replies: 170
Views: 14339

Re: China and biological warfare story

What he means is simply this, if you are from America and you think that China is an enemy and you have the chance to observe the enemy, what would you rationally do. Would you be putting more resources in China or any other country to keep an eye on them or would you cut back the funding and take ...

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by WIederling
Sat Jun 05, 2021 8:44 am
Forum: Non-Aviation
Topic: China and biological warfare story
Replies: 170
Views: 14339

Re: China and biological warfare story

Or, you are willing to accept the collateral damage. See also, theoretical use of tactical nuclear weapons in Germany, 1946-1990. There is an operative around on the globe well known for not looking into consequences beyond direct effects. ( blowback like things are invariable unexpected and unfair...

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by WIederling
Fri Jun 04, 2021 1:36 pm
Forum: Military Aviation & Space Flight
Topic: Space junk
Replies: 26
Views: 3153

Re: Space junk

The most obvious decision we can take is to reduce the number of launches. Or make de-orbit mandatory, including requiring insurance for clean up if the de-orbit fails. What is your position on commercial entities setting up massive space segments for some project or other? ( Starlink comes to mind...

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by WIederling
Fri Jun 04, 2021 1:31 pm
Forum: Non-Aviation
Topic: China and biological warfare story
Replies: 170
Views: 14339

Re: China and biological warfare story

How do you weaponise a virus without it eventually infecting your own population? One of the defining feature of a weapon is that you can aim it. Or, you are willing to accept the collateral damage. See also, theoretical use of tactical nuclear weapons in Germany, 1946-1990. There is an operative a...

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by WIederling
Wed Jun 02, 2021 7:10 am
Forum: Civil Aviation
Topic: FAA Confirms Boeing Halts 787 Deliveries
Replies: 392
Views: 91789

Re: FAA Confirms Boeing Halts 787 Deliveries

Just so sad to see what Boeing's become. They only deliver two pax plane products (737MAX and 787), both have been grounded multiple times, and IINM they both hold the narrowbody and widebody records for grounding, as well as the former with the all-time grounding record for a plane returned to ser...

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by WIederling
Tue Jun 01, 2021 5:24 pm
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 273
Views: 47145

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

There is the main difference between the 737 and the A320 the FBW. Yet FAA and EASA are doing a deep dive on the 777X which is Boeing's third generation of FBW. I don't think having FBW will grant any degree of regulatory immunity to what we refer to as A322. ... I agree. In this regard Airbus will...

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by WIederling
Tue Jun 01, 2021 5:04 pm
Forum: Technical/Operations
Topic: A321XLR’s rear fuel tank demands special fire-protection conditions
Replies: 224
Views: 48643

Re: A321XLR’s rear fuel tank demands special fire-protection conditions

Pictures above, seem to be aft looking forward, its more clear in the press release image. But you can see the attachment points for the rear wing to body fairings and also in both, the area painted with a white topcoat would be what is under those fairings showing, rest is the green primer ready f...

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by WIederling
Sun May 30, 2021 12:01 pm
Forum: Military Aviation & Space Flight
Topic: China's Long March 5B rocket ( CZ-5B R/B ) to re-enter and crash to earth, but where??
Replies: 27
Views: 3604

Re: China's Long March 5B rocket ( CZ-5B R/B ) to re-enter and crash to earth, but where??

Look on the bright side, Moo. In America, you've got the freedom to criticize the government. In the PRC, you've also got the freedom to criticize the US government. Bit of a Radio Jerewan thing, isn't it :-) Q: is it true that in the west everyone has a car? A: in principle yes. But we have the pa...

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by WIederling
Sun May 30, 2021 11:56 am
Forum: Military Aviation & Space Flight
Topic: China's Long March 5B rocket ( CZ-5B R/B ) to re-enter and crash to earth, but where??
Replies: 27
Views: 3604

Re: China's Long March 5B rocket ( CZ-5B R/B ) to re-enter and crash to earth, but where??

As the above states, the US has some blame here, ...... IMU this was direct fall out from the US assuming control over space ( if by words only ) the A-Sat test was a kind of "Think Again" hint. Then and IMHO : China is moving much faster through industrialization including "getting ...

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by WIederling
Sun May 30, 2021 11:45 am
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 273
Views: 47145

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

Trading A320 family commonality for range & belly space. If they manage to backport the new single slotted flap design and some other enhancements to the smaller models they have actually gained commonality : single flap design (with improved aero) over the whole family. The Xtra Tank is a &quo...

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by WIederling
Fri May 28, 2021 7:22 am
Forum: Technical/Operations
Topic: A321XLR’s rear fuel tank demands special fire-protection conditions
Replies: 224
Views: 48643

Re: A321XLR’s rear fuel tank demands special fire-protection conditions

I guess we see the aft wall of the tank and a cuboid extension to it? Any insights on what this does? Clearly not using all of the available volume for fuel... https://airbus-h.assetsadobe2.com/is/image/content/dam/products-and-solutions/commercial-aircraft/a320-family/a321/First-delivery-RCT-A321x...

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by WIederling
Thu May 27, 2021 5:41 am
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 273
Views: 47145

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

JetBuddy wrote:
That's not necessarily true. Airbus could launch first because they know Boeing is planning an all new model. This would be a repeat of the NEO vs Max situation. And we all know how that one turned out.


In all truth Airbus did not preempt Boeing in that case. They called a bluff.

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by WIederling
Mon May 24, 2021 10:16 am
Forum: Technical/Operations
Topic: DL A359 MTOW?
Replies: 7
Views: 2301

Re: DL A359 MTOW?

It's easy to reduce MTOW on paper, but can earlier builds get a higher MTOW on paper as well? I don't have an answer for that. I'd risk that it's not only a paper upgrade, but also some hardware upgrade - but take it with a pinch of salt. Perhaps someone else is able to confirm. AFAIR: Batch 1 was ...

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by WIederling
Mon May 24, 2021 8:39 am
Forum: Technical/Operations
Topic: A321XLR’s rear fuel tank demands special fire-protection conditions
Replies: 224
Views: 48643

Re: A321XLR’s rear fuel tank demands special fire-protection conditions

I have no idea of pressure inside "regular" tanks, but from general perspective it makes sense to somewhat pressurize them in flight, at least as much as inerting system would. No gas exchange with the main cabin volume, sure. That would be an ancillary detail. IS the tank inside or outsi...

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