Re: Potential 5 Wheel Boogie for A350/B777

Interesting I did not know the A350 6 wheel bogie was narrower than the 4 wheel, . "Splayed Feet" That is the trick used to achieve sane pavement loading numbers ( in comparison to the 787 ) A350 wingbox is quite a bit bigger than the 787, you get more room behind it to stow a larger MLG....

Re: Potential 5 Wheel Boogie for A350/B777

Would it be possible to produce a 5 wheeled bogie design for any aircraft using a 6 wheel bogie design to save weight? For large aircraft the wheel and tire assembly can weigh 250kg a piece hence reducing the number of wheels by 2 could save 500kg. Both the A350-1000 and B777-9 with only 10 main la...

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...

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...

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...

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 ...

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.

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...

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...

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...

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...

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...

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...

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.

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...

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...

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....

Re: Boeing MAX-10 First Flight Thread

flyingclrs727 wrote:

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

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 ...

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...

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 ...

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.

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...

Re: Space debris removing mission

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

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.

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. ...

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...

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?

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...

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...

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...

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...

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...

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...

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...

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...

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...

Re: New A330 Wingtips?

smartplane wrote:

Hopefully all involved have rock solid IP protection.

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 ...

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...

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...

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...

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...

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...

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...

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...

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 ...

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...

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...

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.