That wouldn’t work, the fuselage will always try to become circular in total for the cross section, having two or more circular sections will not remove the fact that the whole thing is not a single circle. Can’t have your cake and eat it too. It works as long as you insert a "stiffener" ...Jump to post
Why can't just use one blade, like an Archimedic spiral? propellers and fans, water screws and such each are the simplification/reduction to minimum of the archimedic spiral. single blade helo: https://en.wikipedia.org/wiki/B%C3%B6lkow_Bo_103 abstract: https://en.wikipedia.org/wiki/Monocopter wind ...Jump to post
https://cdn.iz.ru/sites/default/files/styles/900x600/public/photo_list-2017-05/8f72244b4f25b1d1c195ea71be38d1b9.jpg?itok=qt6y6x3X https://s3-eu-west-1.amazonaws.com/files.surfory.com/uploads/2016/2/3/543e9f481f395daf0c8b4567/56b1f0ffbd0470ba4f8b4569.jpg http://www.autoforum.cz/tmp/magazin/m9/maz-20...Jump to post
As a person paying for a mortgage, I can say: at the moment I have a mortgage for 25 years, at ~15% per annum, payments for which are ~$335 dollars per month (this is about 33% of my monthly salary). And this is about the same as it cost me rent in Moscow. I've hear some rumor that (some, lots? ) R...Jump to post
Planeflyer wrote:What are current readiness rates for German Tornados?
" .. One solution is to insert vertical rods inside the tube, adding strength but not too much weight. .." That would partition the hold into symmetric halves. LD3-45 would not fit at all. IMU you are stuck with a "floor beams in compression" solution. ( if that actually is a vi...Jump to post
" .. One solution is to insert vertical rods inside the tube, adding strength but not too much weight. .." That would partition the hold into symmetric halves. LD3-45 would not fit at all. IMU you are stuck with a "floor beams in compression" solution. ( if that actually is a via...Jump to post
"And this is also why the later DC-10 variants had that center gear, to spread and carry the weight a bit more evenly. So this is at least a concern with trijets that doesn't exist with quads or twins." The A340 has a third (middle) MLG leg too. But "not taking the forces for a walk&q...Jump to post
There is a buzz in the industry similar to the launch of the Dreamliner. Everybody wants in on the 797, as they know it is the next big thing. Has anyone amassed riches ( or even just made an overall profit ) from being on the 787, the Last Big Thing? IMU the next Big Boeing Project is still in the...Jump to post
Is it multifuel or can the Secret Service still sabotage it by way of filling up with petrol ?
"height adjustable chassis".
https://en.wikipedia.org/wiki/Mercedes-Benz_W186 ( 1951 )
neutrino wrote:lydh wrote:China's high-speed trains are ratchet, pretty sure I'd pay extra to be on a plane.
Are you speaking from experience or extrapolating from hearsay?
Someone above mentioned the A300.... Can anyone explain to me why the A300 didn't seem to do anywhere near as well as the 767? I know the A300 came out first, but what made the 767 more successful? I know it was early off in the game for Airbus, did that have anything to do with it? My understandin...Jump to post
A very interesting read: https://www.scribd.com/document/287049556/B767-ATA-47-Student-Book According to the linked document, the NGS system works with a maintained air temperature (170F) delivered to the ASM's (Air Separation Modules) that is well above the flash point of Jet A fuel which accordin...Jump to post
Can the Triumph's success be judged by the fact that the picture shows it on pylons rather than in operation? I am always surprised when engineers delve into the misattribution box. .... The flight test program was completed and confirmed the targeted performance. The financial situation of Beech a...Jump to post
You mistyped "Trump". Trump hasn't invaded anywhere, yet .. . :D That was not in the description. You wrote this: If you peel behind the veneer of posturing, blustering and blundering that Putin is doing on the world's stage, you'll find a deeply insecure man who is dragging his country d...Jump to post
What's ROFL here? For people in White House Situation Room this isn't ROFL at all BTW. It's geopolitical reality. I can't help you if you can't see that making such an empty threat is hilarious. Why is it an empty threat? Because the very action of Russia pressing that button immediately guarantees...Jump to post
So they built A350 Mk1 and it was a successful program and then Launched 350XWB later? I'm sure they used the work they were doing on Mk1 for XWB. They just then had to inflate the Fuselage a bit.... The A350Mk1 was to be a rewinged A330, the fuselage dominated by Al-Li use. Like the A310 was a rew...Jump to post
fuel is sold in metric...... IMU that was a "being cheap" step. .. at the start of the 80ties. back then the (mechanical) meters at the pump only had pound fractions ( limit 99p ) When the gallon ( 4.54l) price started to hug the pound line metering was changed to l. ( and you were back t...Jump to post
I accept 6-8 years is reasonable (especially if focused on not making the worst mistakes of the 787 & A350). Please what mistakes are there with the XWB? I think the big bubu on the A350 program was the fact that they had to throw the initial concept (based on the 330) in the bin after they saw...Jump to post
noviorbis77 wrote:Dutchy wrote:Inches? The world is measured in meters, and thus centimeters. Thus the question you proposed is a trick question.
Not everyone uses the metric system.
downdata wrote:The air pollution must be pretty bad in New Zealand for them to park half their 789 fleet!!
lightsaber wrote:One guess why I am excited GE has put CMC turbine blades in the GE9X.
musman9853 wrote:how does air pollution affect turbines?
You are fine with a rule that prohibits a woman’s income from counting because she might get pregnant? trapped in PC thinking, I see. I find such a rule to be abhorrent. If that’s PC, consider me glad to be PC. Compare to everyone being able to sign a paper gets a 100% value payout mortgage on a pr...Jump to post
VTKillarney wrote:You are fine with a rule that prohibits a woman’s income from counting because she might get pregnant?
Illegal immigration to the United States is not about separating families or wanting to live in a police state. It is about better wages here and less violence. Three mass shootings in two days and a rash of drive by shootings say otherwise, but that is for a different thread. This is the problem w...Jump to post
Additionally, the GU-39 has much more range (good for stand-off attack) and you can carry more of them (fewer attacking aircrafts). bt In their illicit attacks the Israelis try to not enter Syrian territory with manned craft. "See, no trespass". you can't shoot us <thumbs nose>. and if yo...Jump to post
People are willing to be in the United States illegally because of wealth distribution. They have none in their home country ..... Quite often due to the US liberating them and/or sponsoring military dictatorships and such in their home countries. On the other hand illegals are the perfect way to g...Jump to post
Development timelines. for the 787 we need to add quite a bit of the effort spent on the Sonic Cruiser. ( warts like the battery system are afaics a carry over from that project ) for T-X I could imagine that it is mostly an "out of the drawer" design from Saab. With Boeing just wrapping i...Jump to post
With the MAX10 there seem to be two springs in series. One the normal dampened oleo and the other to extend the trailing link, possibly undampened and surely with a much different spring rate (because the trailing link can simply rest in the stops nearly all of the time (compressed while at the gro...Jump to post
Some people believe the greatest (only?) threat to the security of the United States is Mexicans. Just because a person comes across the Mexican border doesn't mean the person is a Mexican national. There was an article in the Detroit Free Press a couple months ago about a Romanian man in the count...Jump to post
If Boeing can maintain systems commonality between a 788 and and a -10 why wouldn’t Airbus with a 330neo-derived A300/310neo? They can't. 788 has rather low commonality with the 789/10. 789 || 7810 is easy as the 7810 is a cheap capacity for range derivative. Obviously the core airframe and systems...Jump to post
The more I think about this the nicer this solution feels, I desperately wanted to be a bodge but it just isn't. In fact the only mistake I think Boeing have made here is not having been forced down this route on the 900/900er years ago. This design is kind of a Rube Goldberg solution. It adds quit...Jump to post
Russia's credibility is close to zero, if not in the negative. "levels of credibility" These are invariably Ex Cathedra stipulations. Would you judge the other parties to the fray as strongly credible? Will people ever understand that Schopenhauer's "How to win an argument" was ...Jump to post
... if it is a passive system and relying on stored energy then a spring feels like a better option than compressed gas and if it is an active system then hydraulics seem like a better option. In my engineering experience gasses find every available leak location and this is going to be a very high...Jump to post
Dutchy wrote:Yes, and Ukraine must have missed those nukes when Russia took part of their territory.
I didn't realize how stubby it was but it's probably just an optical illusion due to the fuselage height. 1m bigger fuselage and the tail has become "fatter". ( IMU the hold reaches further back into the tail and is thus fuller and vertical stab has been moved upwards.) Being overall long...Jump to post
scbriml wrote:A reasonable person might ask, why has it taken Russia over four years to provide this "evidence"?
Ukraine is responsible? You mean mother russia didn't claim it's weapons after the USSR disolved ? Did they leave nukes with Ukraine as well? All weapons initially stayed with the (re)new(ed) nations being created after the dissolution of the soviet union where they had been deployed to. Afaik the ...Jump to post
now decomissioned and followed up with the
A320 based ATRA platform:
https://www.dlr.de/dlr/en/desktopdefaul ... lery/19368
https://www.reuters.com/article/germany-realestate-bundesbank/german-property-prices-up-to-35-pct-overvalued-bundesbank-idUSL8N1Q92AS FRANKFURT, Feb 19 (Reuters) - Real estate prices in German cities may be 15 to 30 percent overvalued, the Bundesbank said on Monday, warning that the deviation may b...Jump to post
Just like the Airbus fanboys claiming the A-320 family didn't need winglets because the wing was perfect. Then lo and behold, A-320 family gets winglets...... A bit of a misrepresentation. A320 did not get winglets beyond the endplates because other existing solutions at the time were not worthwhil...Jump to post
mxaxai wrote:This point isn't all that relevant to this discussion here, but anyway, lift at 0° AoA is often not 0. Thus, the relationship between lift and AoA is not strictly proportional.