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Vain
S3 licensed
Congratulations and best wishes.

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Somethings up with µTorrent and some windows interface. Since one of the recent 1.7 releases of µTorrent I get a largely unresponsive system when I run µTorrent and Opera with flash-plugins on websites for a prolonged time, despite RAM and CPU usage being 1-digit numbers. That means the CPU idles at 3% while I get choppy video-playback. Without the combination of the two running the system works perfectly.
If µTorrent hadn't worked flawlessly for years before that and wasn't exactly what I want in a torrent-client I'd immediately have switched. Now I'm holding out until I can think of a solution, which I hope will come in the form of a "A new version is available"-message from µTorrent or Opera.

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How detailed must the design be?
CF is a difficult material and it'll be hard to come up with ISO-compliant life-expectancy calculations that actually mean something when you have no testing facility to back up your assumptions.
Steel is a lot easier to handle calculation-wise and its behaviour is well understood. It is easy to design shapes for steel since it's easy to judge what production-processes can be used.

Really, the first thing I'd do is check out the axle of a real sports car at a local car cemetery/scrapyard. That'll prevent you from setting your first steps in the wrong direction and shorten the brainstorming-phase significantly.

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If the times are UTC I'll try to come.

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The FSI technology is very difficult to control. The aim is to create a small ignitable load of gas around the spark plug so you can open the throttle fully and still get a good combustion while not at full load. That increases efficiency (while not at full load).
However, this only works at low revs because gasoline will distribute too much in the cylinder when the airflow gets more turbulent at higher revs. Thus current gasoline direct injection engines still have throttles so they can fall back to the old and well known method of homogeneously distributing gasoline in the whole cylinder and limiting the amount of air using the throttle at high revs (> 3000rpm).
By now this concept has been dropped due to thermodynamic, cost and practicality reasons. FSI engines are now normally throttled engines with the fuel injection within the cylinder instead of the inlet manifold. This propably won't change until HCCI-concepts work properly, which basically makes gasoline self-ignite so it works like a diesel.

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Well done.

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I use it to stop my graphics card from heating up too much.
The card would run fine at 100% usage, but beyond 80 fps the electrical power merely heats up my feet instead of being used for something useful. Restricting fps also keeps the temperature within the PC-case low which has a positive effect on the CPU- and GPU-fan-speed/noise.
Notice that CPU usage isn't affected because the physics run at their very own fixed rate that has nothing to do with the frames per second on screen. However, with LFS being single-threaded and most modern computers having several cores CPU-power shouldn't be any issue.

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Quote from hrtburnout :20's not that old, is it? I have a colleague who turns 39 every year

"The age of 39 are the 10 best years in a woman's life."

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Sorry, but I can't stop grinning when I think of this thread and this, so I thought I'd share the humour.

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Mathematically both algorithms should find the same solution.
My first explanation for the difference, without knowing the actual formulas used, is that the integration-method keeps integrating the approximation-errors and thus ends up with a bigger error in the result than in any of the data-values. I'd hazard the guess that the approximation will only deliver sound results when you have largely more data on the power-curve.

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The image-effects look like some german movie. I'd guess "Lola rennt", though I didn't see it. The street scene would fit though, if I'm correctly informed about the general story of the movie.

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Quote from Shotglass :that layout is surprisingly good for heel and toe if you use the ball of your foot on the brake and press the throttle with your heel near its pivot point

In my opinion top mounted brake + floor mounted throttle is just about perfect when the brake-pedal is adjusted properly. Then your foot is in the perfect place to blip the throttle under braking and is not obstructed by the brake-pedal. Then you don't use the ball of your foot on both pedals, but the top part for the brake and lower part for the throttle, like pointed out in the quote.
On other configurations heel-toeing is likely to give me cramps in the leg...

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A quick google check brought up some interesting threads: One, Two.
Not a solution to the water-proofing problem, but a nice piece of kit that'll sure make such situations less of a gamble.

Oh, and you're likely to find people with a lot of expertise regarding your issue here.

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Last edited by Vain, .
Vain
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Quote from samjh :Wikipedia quotes 45% for diesel, and 30% for petrol. I tried to follow the source link (from Volvo), but the page no longer exists.

Take efficiency-percentages of diesel versus petrol with a lot of salt.
The problem is that when you calculate the efficiency of a diesel engine against the theoretical maximum you choose a different scale than when you calculate it for a petrol engine, and incidentally the scale for diesel is lower, which thus gives the diesel higher efficiency-ratings.

That issue is one of the mayor problems when comparing diesels to petrols. Don't trust those numbers unless you've thought a lot about it.

That said, diesels are good for efficiency, especially at low load, like in daily trafic.

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Regarding WTCC I don't want to make any statement until round 8 when we have seen the cars on a number different tracks. But last weekend things looked pretty balanced. ...You don't see RAC drivers complain about the FZ5's unfair advantage on the straights either.

Apart from that racing is always the workplace of automotive pioneering. That means all regulations should be made to reflect what the automitive industry is trying to achieve. Right now we need more and more efficient diesel-engines. When we process oil we produce diesel as a by-product and at the moment it doesn't find as good use as it could (which we can see in the price). Thus we should promote diesel powered cars until this imbalance is rectified so we can make the most efficient use of the resources we have.
Also, diesel-engines still have a lot of room for improvement. We should really encourage any move towards advancements to diesel-engines. When we want to see cars that go 100km with less than 3 litres of diesel (we already got 4 L/100km) we need to make expensive diesel powered cars worthwhile in the car-shop, which means promoting diesel powered cars to customers through racing to break the "diesel is for trucks"-prejudice.

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I'll skip the burnt-out discussion and go for the suggestions.
Recently I found it quite enjoyable to reset my mindscape for an evening, ignore the result-centered league-racing and go to some random servers and play. Sure, you get bumped off the track every third race but the rest is a lot of door-to-door racing because neither you nor your competitors know the combination well. I've also found it fun to toy around with the clutch-pedal, 720° rotation and the H-gate shifter for that purpose.

The whole point, I guess, is to treat LFS as a just-for-fun arcade-racer instead of focussing on positions and championship points because, let's be honest, those achievements have lost their attractivity long ago.

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1. There are thoughts about using energy to make radioactive waste harmless, but likely fusion will come early enough to not make the thought worthwhile.
2. Every process causes dangerous emissions if you keep it up long enough, even when you just warm yourself by standing in the sun.
Fusion turns Lithium and Deuterium into Helium. We've got a lot of Lithium, Deuterium is a part water - also available plenty, and since Helium isn't very dangerous we can live with it for a while, until our voices turn funny.
The Lithium is turned into Tritium before the reaction, which is midly radioactive, but it only emits beta-rays, which is the not-very-hazardeous type, e.g. shielded perfectly well by 3mm of plywood.
We can propably live with fusion until 5000 a.d.

But ultimately, their is no circle of life and any process will change our enviroment if it's kept up long enough.

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I concur that "Zero Emission" is of course just marketing babble. Face it, nothing comes for free.

But a different point: Did you notice where they out the hydrogen-tank? That's going to be a nice fire-ball when a Porsche Cayenne rear-ends it.

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Welcome to the team!

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I'm the one to blame for Dave's tyres.
I had a nice race. During quali I was hoping to be able to make an impression on Hannu from the second grid spot, like in the Bl GP race, but p1lot eventually managed to claw into 2nd and when the race started Dave decided he'd like to get a shot at it himself.
My race start was a bit rotten. I was very unconcentrated and not very happy about my position, but when I later found into the rythm things worked beautifully. I even had to worry about undercooling the rear tyres. My laptimes didn't reflect the good tyre condition though because I had no one in sight in either direction, which made it hard to stay focused. So I concentrated on bringing second home.

Cogratulations to Hannu for the win of the race and season.

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Thanks for organizing the season, Dan!
I think the fact that I've stayed with the RSC since the first race of the first season says enough about how much I enjoy your work, so be sure that if you ever decide to make another season I'll move whatever mountains I have to to lay my hands on a grid-spot.

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Congratulations, Chris.

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I just did a 30 minutes race and pulled a 2:51.24 with the set I posted earlier (for those who missed it: Click!) The tyres did suffer a lot though because the car only goes that fast when you slide it (...thanks LFS tyre physics!).
...3 more tenths and I can start bullying P1lot...
.. ... "Be afraid! The thousand (-fourhundret) kilos of the FZ5 will descend upon you!!"

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Quote from DasBoeseC :ABSOLUTELY MAGNIFIC!

Thank you, thank you, thank you!

I just adore the 956/962 (there's simply no sweeter sound.....to me ) and if you've got more vids.....keep em coming

CU, Sebastian

In that case, head yourself here (DVD "Porsche 956 Incar" at racing-underground).

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Quote from wheel4hummer :What motivates you to copy and paste articles into posts on the LFS forum?

Very likely the concept that controversial ideas should be discussed between humans to extract a clearer view of the truth from the joint intellectual horizon.

Regarding the article I can imagin to agree to a few core-points. However I can't say I'm an expert on americans since I'm not one of them. I believe in the concept of in dubio pro reo and thus will not accept a negative view on a group of people I don't know well enough to be entitled to such an opinion.

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