Re: Similar to...
I am pretty certain that that should read "Obituary request.."
(Currently making sure that the next generation also gets to grow up in the Discworld)
120 posts • joined 7 Jul 2008
It must also be noted that the efficiency of a combustion based energy conversion has a maximum efficiency of approximately 35% (diesel ICE), whereas an electric machine operates n the high nineties.
Furthermore, an electric drive-train allows numerous advantages with regards to propulsive integration.
Undesired wake interactions can be avoided. Propeller disk loading can be optimized (yielding higher propeller efficiencies at lower speeds). Boundar layer ingestion and propeller / wingtip vortex interactions can be used to further reduse aerodynamic losses.
Electric drive-trains also lend themselves to high redundancy architectures, which increases safety and allows for what would otherwise be deemed to be "risky" strategies like blown wing designs (NASA), further reducing the required wing area and thus drag.
Finally, maintenance- and operational cost can be significantly reduced with an electric drive-train.
These are all things that are being studied intensely, but which will require a number of key technologies to mature before being widel adapted. And meanwhile, the cumulative effect of a couple of percent's worth of annual improvements in efficiencies for conventional aircraft means that there will be a certain amount of catch-up to do as well.
It may be worth noting that the Siemens electric aircraft propulsion unit was aquired by Rolls Royce in October 2019
This means that Siemens position in the project is irrelevant.
Please inform me which bit of the statement is childish?
"The trade war between China and the US looks to be abating" ..I can not determine whether this is accurate, but I can not see anthing childish about it..
"though with a certain" ..words
"unpredictable" see exhibit A
"orange-faced" see exhibits B to ZZ
"loon" .. if implying waterfowl, then inaccurate.. if implying nutcase, then I refer to the The Donald J. Trump Presidential Twitter Library, as well as many many hamberders, umbrellas, invisible F35s, truck-horns etcetera .
"in the White House" ..regrettable, but not childish.
Having not experienced the cold war at its deadliest heights, I have only for the last 3 years started to feel some of the exsistential fear of not knowing wheter someone, on a whim, will screw up for all of us tomorrow. It is not a nice feeling.
The senate missed a great opportunity to make the world a safer place yesterday.
El Reg being a British (soon to be English) Rag, I expected some downvotes for that comment :)
I just find it funny how the "nation of tea drinkers" often serve stuff that more or less comitted tea-drinkers from the rest of the world find awfull..
Anyway.. to each his own.. It all depends on what one is used to.
Having tried the "teas" available in the UK, I can onl comiserate with you for trying to make these liquid horrors drinkable. But do not despair.. There is more to tea than that which can be found on the shelves of Tesco.
/me pours himself a cup of "Prinz von Homburg", a green tea blend from his local tea store, which by now is being exported to friends and familyy all over the world..
The big diference is that combat aircraft are expected to fly into areas where small bits of heavy metal often traverse through the airspace at supersonic velocities. Thus the chances of a turbine taking damage and shedding bits are intrinsic to the design. In civil flight, the design objective is for this kind of situation not to occur in the first place. Statistics show that this design objective is by and large valid.
Yet, when I fly, I try to avoid seating witin the ballistic cylinders of the engines, which has the added advantage of reducing noise levels where I sit.
"This quote: ... makes it clear that it is a Europe-wide problem."
Do you really believe that Brexit uncertainty is not creating Europe- or world-wide problems?
The clusterf*ck of Brexit shenanigans combined with the unpredictable orange genious taking loudly and carrying a small d*ck makes EVERBODY uncertain about what will come next. Uncertainty leads to reduced investments.. which leads to economical slow-downs.. which leads to brexiteers happily quoting lacklustre performance in the rest of the EU as a reason to go ahead with their destructive idiocy.
I am convinced that Brexit can trigger a worldwide recession which will be destructive for everyone.. but mostly so for the UK.
Reading a BBC hys from outside of the UK has become extremely depressing because it daily demonstrates the level of thinking that is behind the whole thing, and it is not a pretty sight.
The Triton (Maritime Global Hawk) is not a stealthy aircraft designed to operate in wartime conditions.
Seeing that it was operating in (or above) civilian airspace, and that there was (up to the last second) no shooting war going on, it is not unlikely that the transponder was switched on as well.
Thumbs up for "Riding Rockets".
My copy was recursively lent out, and endet up in the hands of a NASA engineer who knew most of the characters in the book personally. After falling of the chair laughing, this guy then ended up buying 10 copies to give to all of his friends in NASA.
A VERY worthwhile read.
(Oh.. and DID get my copy back in the end)
In my eyes, the Gimp UI is not a problem. I am still loosing the toolboxes every now and then, but otherwise the menu's do what they say that they do, inclunding the opening of new toolboxes.
Gimp covers all my personal and professional needs for bitmap processing (including website work).
Expanding my free toolbox, Inkscape covers all vector graphics needs, including backporting pdf's to dxf for import into CAD (reverse engineering parts that do not come with a 3d model).
Libre Office writer is good enough to handle large technical documents including operating manuals with very complex page numbering (LO-Calc remains lacklustre).
If you want a horrible UI, then go look at Blender3d. All other programs (except, maybe dwarf fortress) pale in comparison. This is a pity, since the program itself is getting mighty powerfull. (I work in CAD on a daily basis and I used to handle 3dsMAX in various versions, so it is not a matter of not knowing 3d),
"....who we've beaten twice in a World War already....."
The UK not being forced to surrender was very much due to circumstance (that you happend to have the English channel between you and the German Panzers) and lots of help from other countries and / or the people of these countries who were your allies or became so in order to conquer the Axis powers.
Fighterpilots from all european nations (and even some US volunteers) helped win the battle of britain.
Norway, who were then the world's 4th largest shipping nation, sacrificed it's mercant fleet in order to keep the UK supplied during it's darkest hours, Resistance fighters all over Europe kept the UK updated, often loosing their lives in Gestapo torture chambers for dong so.
Reading Brexiteers pulling put WW2 and animosity to Germany as a reason / backdrop for their phobies is sad, because it is plain out wrong. WW2 was wan through European cooperation, and the EU was born out of this.
The UK is not so unique, it is just another nation that has succumbed to the echo-chambers that modern connectivity has created. I dearly hope that we will all learn to deal with this problem, and that the world can return to some degree of normality after this decade of self-induced extremism.
To my understanding, two things put the brakes on the A380: ETOPS and NEO.
New ETOPS rules (Engine Turns Or Passengers Swim), originating (who would have guessed) from the USA led to a lot of new competition that the A380 had not been designed to deal with. NEO led to savings making these competitors being cost competitive. On top of it, there are not enough airports with the infrastructure required to handle the A380 efficiently.
An A380 NEO might change the picture.
"Those who are still there don't see you as a person. You're just more meat for the system."
-I feel sorry for you and the healthcare system that you are in.
I know plenty of extremely experienced doctors who continue to care for their patients as people throughout their career. That they will have sleepless nights due to their work is clear, but they deal with it.
At the same time, there are clearly some fields of medical work, where patient death occurs more often (with or without the intervention of a doctor). Not everyone can continue to function in these fields, however, there are enough "safe" fields that one can move to if it gets too much..
A high growth rate is easier to acheive if you start from a low number than when you starting-point has centuries of growth behind it.
A high growth rate is also hard to consolidate with stringent safety-, environmental- and labor-rules.
Freed of all of these, both the EU and the UK could much more easily acheive growth numbers similar to those acheived in Asia today. However; Is this a rabbit hole that we WANT to enter?
I have so far been under the impression that NHS at al is something that the UK wants to keep?
But here comes the BIG issue:
A patent can be extended to around 20 years (depending on country) after FILING.
This means that ground breaking expensive new technologies that need time to reach market maturity often runs out of patent time before it earns any money, while the rhythmic moaning of some idiot who can not hold a tone without massive computer filtering is protected for all eternity.
It is definitely time to release the mouse.
With this kind of payload mass and flying at these altitudes, this system is designed to carry communication equipment and little else. Fast communications / internet with no ground infrastructure is the goal. Earth observation payloads (visible light, hyper spectral, radar, lidar) are too heavy, and cloud cover will often obscure the line of sight (except for Radar).
If the goal had been surveillance, then the system would have ended up looking a lot more like the U2.
Q: What is the title of the world`s thinnest book?
A: "Swedish war heroes" (Alternative: "Highlights of Dutch cuisine")
Q: How do you sink a Swedish battleship?
A: You put it to sea (Vasa anyone?)
Q: How do you sink a Swedish submarine?
A: You dive down and knock on the hatch. They will promptly open it to see who is there.
Q: How do you sink that same submarine again?
A: You dive down and knock on the hatch. They will open a window to tell you that they will not fall for that trick twice.
..Now guess which side of the No/Se border I am from :)
"....and one nice straight run over Trumps next Inauguration...*"
Do not forget that he has now instructed the pentagon to arrange a military parade.
During a parade, it is common to have all parading personnel face the dictator as they march past. It is just a matter of convincing the great orange one that this includes all tank turrets as well...
So you were the /%$/&&(/ that without warning rammed your seat into my knees and kept it there for 8 hours straight?
I am tall and mainly legs -this was not my choise. I barely fit into exonomy -but I often do not have a choice. However, once you ram your seat back, I WILL be in pain. And reclining my own seat does not help. Therefore: Please check behind you before insisting on your "rights". You might even consider skipping being an inconsiderate $§"$% once or twice.
"No idea, why don't you ask Richard Branson why the f**k he commissioned White Knights One and Two? It obviously wasn't to launch SpaceShips One and Two"
...And strangely enough they desided to drop the rocket/spaceplane DOWN at launch, rather than carry it on top and hope it will not touch something important before it starts to climb.
PiggyBack spaceplanes are a way to TRANSPORT a spaceplane from one site to another, not for launching (SR 71 /D21 excluded for good reasons).
So WHY do you wish to carry a spaceplane on top of an A380 again?
What they need is an A380 NEO.
The New Engine Option led to savings in fuel consumption that made the extra outlay for the A380 uneconomical.
Getting ultra high bypass engines (maybe with geared fans) onto the A380 as well as the other aerodynamic refinements that made the NEO such a hit would make the A380 competitive again. The question is: Will it be sufficiently competitive to pay back the investment?
I am convinced that they are crunching numbers in Toulouse and Hamburg.
The way I understand this new law, it is NOT about going after the posters themselves, but rather to hold the "publishers" of said posts accountable for them. The idea appears to be to apply similar rules to the publishers as the rules that currently apply to newspapers (if you earn your living from publishing falsehoods and hate speech, then we will hold you economically accountable for this). I know that this may sound strange to an English public, that knows nothing but newspapers publishing lies and falsehoods with no repercussions, but this is how things are dealt with in the rest of the western world.
Seeing the amount of damage done by "social media" lately, I believe that I can live with this.
Without the echo-chamber of today's internet, I believe self-radicalisation to be much less likely, possibly preventing types like mr. Brevik from being triggered. It is, as always, a fine balance, and Germany is struggling to find it.
That said, I feel that there is a somewhat unsavory tendency in German politics to try to use the law to go after perceived nazism. They spent decades trying to get the NPD, and now they use similar tactics against the AFD. The efforts against the NPD were squashed in courts multiple times due to incompatibility with the constitution (too many informers inside the NPD).
In one way, German politicians are stuck between a rock and a hard place. With Germany's past, theyy face criticism when they are lenient with right wing demagogery, and they face criticism when they try to do something about it.
please do not turn the Register into the commenzs section for a BBB article about Brexit.
The amount of anti-German xenophobia displayed in those comments is horrifying.
Mrs. Merkel took steps that she believed to be the right ones at a time when the EU borders were buckling, very much as a consequence of failed anglo-american policies in the middle east (iraq war etc...).
This did not leadt to optimal results, but the alternative might have been much worse.
(I am personally critical to unrestricted immigration, but a number of the stories I hear from these people are truly heartbreaking).
Germany now faces the big and difficult task trying to integrate these people. In this, it should not be forgotten that Germany has had to integrate huge numbers before; Peopleb(many of them Jewish) fleeing from the Soviet Union between the wars (which led to sentiments reflected in the UK today), 12 Million Germans fleeing from the Russians in 1945 to 1950 and 1.4 million "German"-Russians after the fall of the wall. Germany also had to refurbish and re-integrate all of East Germany in the same period. Hearing the british complain about having too many Polish plumbers and Romanian field workers is ridiculous.
While WW2 is very much celebrated in the US and the UK, Germany has all thoughts about empire building very much bombed out of them. To the Germans, the British were seen as a sane partner nation, that could serve as a counterweight to the French. How this is currently misrepresented in the UK is quite sad.
And myself; I am neither German nor British, and I live the productive life of an immigrant.
"Take the Hyperloop. Has no one spotted the massive amounts of rust which you can see forming on the inside of the currently build test track? Every time a reporter films and gives you a shot of the inside then you can see it for yourself. That's not an example of good engineering and it can cause many problems in the future, but it seems no one cares."
-If I build a quick and dirty concept demonstrator (and I often do.. sometimes even in LEGO), I do not bother with corrosion protection unless this has direct impact on the concept that I am demonstrating.
The hyperloop tube itself will require serious engineering. Engineering the hyperloop tunnel BEFORE engineering the hyperloop capsule is what leads to engineering marvels like the F35 and the Space shuttle.
It was a series of aircraft.
The first one was built by NASA scientists in their spare time. Apparently quite a few of them were building their own aircraft on hobby basis.
As the program moved on, the basic shape aquired a flat under surface with delta wing and long chin strakes https://www.nasa.gov/sites/default/files/images/299259main_EC75-4643_full.jpg
Looks familiar doesnt it?
Following the evolution of aircraft design can be quite facinating.
For example the offspring of TA183 can be all over the world. amazingly the Saab Tunnan is the one that got closest to the original design, apparently because the Swedish were most adept at reading german technical documentation on it's original language.
"Of course, the idea of a lifting body space plane isn't a US invention, it is a copy of an idea the Russians were trialling in the 1980s."
If the Russians played with lifting bodies in the eighties, then THEY were the copyycats.
"The original idea of lifting bodies was conceived about 1957 by Dr. Alfred J. Eggers Jr., then the assistant director for Research and Development Analysis and Planning at what later became the NASA Ames Research Center, Moffett Field, CA"
"In 1962, FRC Director Paul Bikle approved a program to build a lightweight, unpowered lifting body as a prototype to flight test the wingless concept. Construction was completed in 1963"
All this research made it possible to create the DreamChaser without having to spend large amounts of money on aerodynamic research. Basically they picked up a dropped NASA project,
I can believe that it is possible to print metal in new ways that allow for reduced cost or higher speed.
I also know that quite good yield stress (arond 1000 MPa) can be obtained in 3d printed steel. However, I have not heard of these printed materials also having good fatigue resistance (please correct me if I am wrong). Until fatigue is solved, I fear that 3d printed parts will remain difficult to use in high performance machines like the jet-engine mentioned in the article.
Also; part warping appears to be a problem with (some) free-standing thin walled structures
Still, I would love to be able to engineed high resolution 3d printed parts that are strong, fatigue resistant and liquid/gas-tight.
Nope, you just need to know where to buy one.
Using on-board low power illumination and the night vision camera, it us much easier to fully explore a large void as the one detected, than it is to use an endoscope.
Having seen one in action, I must say that this is a serious piece of equipment, not comparable to a $20 toy from China.
If you turn the aircraft upside down, the air flowing over the upper (formerly lower) surface of the wing will still flow faster. This can be acheived by most airfoils (including a flat plate) by adjusting the angle of attack properly (point the nose of the aircraft somewhat upwards). If memory serves me right, approximately 2/3 of the lift is generated by suction over the upper surface (air flowing faster than ambient airflow) and 1/3 by overpressure (air moving slower than ambient airflow) over the lower surface. This again varies with the airfoil in use.
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