Physics Man
Physics Man!
Where are all the Physics, man?
Where am i, oh; half way in the sky.
look out! its the physics Man...

Broken/remapped F12 key?

Im presuming that these leagues use insim?, does insim packets show engine damage, if so can the server not stop a reconnecting user that had damage at the disconnect time from 'joining' for 2 mins?

Simon

Ive got a feeling that lfs only uses spring and position forces, to simulate 'stiffness', the 'damping' would be a more suitable effect.

Simon

Ive been racking my brains to wonder why oversteer in lfs is relativly easy to use (as a style), and then something occured to me the other day, i have never been off the track backwards due to oversteer, only sideways even locking the rears in a hairpin, due to my outstanding superhuman control?, i doubt it

In summary in think understeer in lfs feels natural but oversteer does not, therefore wierd rear end setups become faster than they should be.

BTW ive got an imaginary degree in physics and i had a dream i won a grand prix therfore im fully qualified to make these statements

Simon

I know that this is not directly relivent but, in the wet when i stopped my real world car (yes they exist outside our bedrooms ) my tyres were allways steaming a lot and quite warm to the touch, for fun one day i drove the car at 90 banana's per shooping bag (imperial) down the motorway, so no corners or anything left the motorway and gently braked into a parking bay and used the temperature probe from work, to my supprise the temps were 42 C inside and 38 C outside of the front tyre and 36 C and 35 C for the rear.

I suppose my tyres (Bridgestone RE70's) are closest to 'super road' tyres as they are pretty soft and a very hard sidewall and is treaded almost like a cut slick (with the wet performace to-boot )

What im trying to say here is that rolling along at a fair speed is going to stop any rapid cooling down of any 'soft' tyre.

It does annoy me that a simple quick slide can end up with one tyre that is super hot, knocking a second off laps to make it round safely and try and keep the tyre from avalanching (sp?), these things will eventually get tweaked though.


Simon

I posted about the clutch earlier saying that my car had slip when virtually flat shifting right in my peak torque area, well i found out that subaru do it delibaratly with a clutch engaugement damper. Guys who drag race them dont have the damper and just sidestep the clutch and let the transmission flex and tyre slip do all the work, they dont get clutch wear or overheating. (busted gearboxes mainly)

Hope this helps

Simon

Ymca?

Im loving the new gearbox stuff even though my left foot still thinks its the brake foot and all i do is coast off the road in several places instead of braking with my right foot

Oh and about the clutch, in my own car if i do a 'racing' gearchange the clutch (even though its almost new) does slip between gears (400+nm torque) so i do have to get a definate lift in there, also there is a very obvious indication that my clutch is getting hot, but i dont think scawen can do smellyvision yet

Simon

63rd, damn, stuck in the midfield again, mr average...

Quote from flymike91 :

I don't really care about better AI, i only race online. I hope the devs don't spend too much of their time on that IMO

It would be sensible to be using the ai code for the online prediction, so improving the ai may also improve the online prediction too.

Simon

Quote from tristancliffe :

That bit is true - engine braking is primarily due to friction not compression. That is why you don't get more engine braking in a diesel (high compression) than a petrol (lower compression) or a turbocharged petrol (lower still). It's a common misconception that you've bought too. It has nothing to do with the exhaust valve staying slightly open at all - that's just silly.

Tristan, i have some anacdotal(sp?) evidence to support your theory, i too thought compression would be a mayor part of the equation but i dont think so, i had my car fuel cut on me due to overboost (boost soloniod failure) at full chat, that gave me MASSIVE engine breaking for a moment (1-2 secs?) much more than normal engine braking, i can only attribute this to there still being intake pressure makeing full compression and once that had gone the car slowed normally. (i was throwed forward so hard i hurt my neck and luckly i was going in a straight line, i would of spun in a turn)

I now also believe that the compression isnt a mayor factor in the resistance of the engine to turning.

Simon

Quote from lalathegreat :

I suppose it does work in an ideal situation.
from what experienced in real life its not as simple as the explanation the developer gave.

In real life when you tune an ECU Fuel map(S) its usually done based Manifold pressure vs RPM. an Na Engine tends to make more power running slightly rich around 13.5 AFR. But thats at WOT in the cruising area were fuel economy is concern you can pull the AFR back till its lean how lean depends, Exhaust Gas temps.

the algoritm in the game to me is fine for NA engines but Turbo charged car you have to run the AFR richer at WOT (around 11~12 ish depends on how much boost). you would actually make more power running a leaner mixture but your can't because the EGT would be too high. So at WOT you would actually be injecting more fuel than necessary and making less power for the amount you injected. so i think were the algorithm is going to break is when you have a NA car vs Turbocharged one the turbocharged one should consume more fuel.

So for me i really don't see power generated as the best way to judge fuel consumption. it would be interesting to see what MPG the GTR versions of the car get.

great post, i would only argue that turbo cars run rich on boost because of knock (preignition) prevention, but would cirtainly have higher egt, but is that a problem for sports cats/water cooled turbos these days? (most dont work tillvery hot anyway)

Simon

Quote from SabersKunk :

When I get asked what I drive I always say Impreza, never scooby.

Mind you scooby is not as annoying as the American subie saying imo...

i find the aus way the best; Sue-bear-rue (using all three syllables stated here )

Simon

Last edited by FlintFredstone, Wed 5 Sep 2007, 13:28.

Quote from tristancliffe :

No, it's a nickname for Imprezas.

I take great pleasure in confusing the brainless oafs that drive them when they tell me, proudly, they own a Scooby. I ask which one? They think for a few minutes, and tell me some silly code that means something if you are a geek. I then ask what model of Subaru. They tell me a Scooby. I re-state that we know he has a Subaru, but which one, then I'll list a few Subaru models to choose from, with Impreza last. Eventually he gives up, and starts thinking about pickles.

Teasing stupid people (4WD owners) is most amusing!

Oy you, i own one!

hmmm pickles..........


Anyway i know most things about mine, ie 4 doors, 4 wheels, frightens young children etc.


Simon

PS '05' TYPE 'UK' WRX STI PPP (sometimes know as a model '9', 'blob eye'), you want chassis, engine code?

BTW 'STI' means subaru fettled, type 'UK' means crippled , 'PPP' means uncrippled (by prodrive)

Quote from Goop :

@FredFlintstone

That video is pretty much a one-off from over twenty years ago. I'd hazard a guess and suggest that tyre technology has advanced somewhat since then.

i only posted as a joke

Theres definatly something not right with the modeling within lfs, but scawen works on it and it gets better every time.

One thing i hope scawen puts in the model is tyre degredation and maybe graining for abusing them/normal tyre wear cycle.

Simon

http://www.youtube.com/watch?v=dv9DT7UXXt8

Quote from Storm_Cloud :

I think that S3 should be a bit more expensive. I've spent hundreds of happy hours on this sim so far for less than the price of a night out, so in value terms it is ridiculously cheap.

On the other hand, a new S3 player will already have to pay £36.00, so any increase on the S3 portion might put off new players or they may just go to S2 and we are left with a split community.

I agree totally with that, i think an S2 license holder paying £24 for S3 but a new license holder buying for £36, what we get is very cheap, this would ofcourse bring out the vocal 5% who say that theyve been cheated/robbed etc.

Simon

Did you convert this to chinese and back to english before posting?



can't under stand the post, sorry

Simon

The only prize ive won in leagues is my own ass on a plate

A farm boy accidentally overturned his wagonload of corn. The farmer who lived nearby heard the noise and yelled over to the boy, "Hey Willis, forget your troubles. Come in and visit with us. I'll help you get the wagon up later."

"That's mighty nice of you," Willis answered, "but I don't think Pa would like me to."

"Aw come on boy," the farmer insisted.

"Well okay," the boy finally agreed, and added, "but Pa won't like it."

After a hearty dinner, Willis thanked his host. "I feel a lot better now, but I know Pa is going to be real upset."

"Don't be foolish!" the neighbor said with a smile. "By the way, where is he?"

"Under the wagon."

Quote from ayrton senna 87 :

no man, i totally disagree with that, i said that other people expect to pass by just sticking their nose beside my rear wheel, i comit myself and make sure that they can see me.

never have i said that.
heres the proof man
http://www.lfsforum.net/showthread.php?t=9203

is this the bit of proof in that thread that your thinking of?

Quote from ayrton senna 87 :

When i did karting years ago i ALWAYS used to crash into people

sorry couldnt resist

Troy

Err.. no, you would still move forward you would still have a penalty, but you would not ruin others race.

Troy

Maybe my solution is too simple; but if a car false starts why cant the brakes be auto slammed on straight way and only released on green?

Troy

I personally like the 'slow' development, more gets covered this way, if it was a bigger team (and worked) the job would be over sooner, we'd have S3 and that would pretty much be it, no more development. The team would then have to move to another project (wages to pay)

I think the slow development will give Scavier/the community more ideas, more perfection, more involvment.

The only thing i can see as usefull would be to sponsor a real racer who could give real feedback to the physics/wear/breakages simulation. This however would cost money, i dont think LFS generates enough income atm for that, im thinking of people like mike jordan/james kay etc.

Troy