my attachemnt isn't working for some reason. here's one more try......

1 looks ike monza but doesn't seem to include the entire track in the picture
2 looks like donnington, i think that's the name, i know the track anyways. it's fun except for the downhill part after turn one.
3 is a garbage picture
4 is a garbage picture
5 is a garbage picture
6 i don't know
7 i'm sure i've played it an a video game, Aida perhaps? doubt it
8 i don't know

here's a google earth file full of tracks

speedfreak227

why don't you play it? is LFS better?

if so, wouldn't this be the wrong forum to sell it in?

just curious

speedfreak227

i have no problem with sellers doing this with xboxes. i just think people are retarded to pay that much and laugh at THEM!

if you check ebay now they're down to $750 or so, give it a week or two more and they'll be at the normal price.

speedfreak227

Quote from Frankmd :

But we are talking about water as a liquid, not as a gas. I am sure pure steam would behave like a gas, but according to a lot of sources, liquid water is nearly incompressible.

Edit: here's a steam table.
http://kahuna.sdsu.edu/testcen ... les/tablesPC/TSatH2O.html

The properties of water change with temperature. The table doesnt show how it changes with pressure, but indeed water (or steam) changes a lot in density at high temperatures.

i was talking about the liquid in the boiler only though. steam tables give the liquid and vapour densities at temperatures and pressures (saturated of course)

speedfreak227

Quote from Frankmd :

I've searched for some figures on the compressibility of water, and I found 0.46 GPa-1.

So if you apply a pressure of one gigapascal, the volume would decrease to 0.46 of its original value?

If so, applying a pressure of 3000psi (equals 20,684,271 Pascal), the volume would decrease (20,684,271 / 1,000,000,000) * 0.46 = 0.0095. So it shrinks by 0.95% if you apply a pressure of roughly 207 bar?

i've only had a few hours of sleep and my eyes aren't clear enough to read your post yet, but the compresability of water isn't linear. in the last few hundred psi it compresses a LOT (near 3000psi) you'd have to look at steam tables to see what i mean. and saturated water isn't really water, i've heard scientists call it "stuff" in reference to supercritical boilers. there's no phase change anymore, there's only the "stuff" phase

speedfreak227

Quote from GeForz :

http://koti.mbnet.fi/kegetys/lfs/
Ghostcar v1.0 for S2

that's cool. i'll give that a try tomorrow.

thanx,

speedfreak227

in case anyone cares, water has 3 times its regular density around 3000 psi. not exactly incompressible. check some basic steam tables to see.

speedfreak227

Quote from RacingSimFan :

For the sake of mentioning boring number facts and unrealistic suppositions, if Hill's car hadnt've crapped out Villeneuve would have gotten 4 less points. He would've then been -5pts to Schumacher going into the final race and his 3rd place finish there would have left him 1pt behind Schumacher which would have made Schumacher the '97 Champ until the FIA took away his points.

but you also have to consider that villeneuve handed first and second to the mclarens. he would have easily taken first. it was heard on the radio that villeneuve's engineers said, "remember juaques, the mclarens have been helpful" (exact words if i remember) refering to the mclarens helping to slow down schumi during part of the race and for juaques to honour the pitlane deal. WHAT A RACE!

speedfreak227

ok this information is usefull but what i need is some science related website that i can use as a reference to introduce this material into my paper.

i'd prefer to not assume the relationship and just use one formula for both. the ideal situation would be a site relating the two directly.

my teacher probably wouldn't be too impressed if i cited, "smith, bob, live for speed forum:off topic, nov 23, 2005"

speedfreak227

i know that fluid resistance varies with the square of speed. (to go twice as fast requires 4 times the power, 3 times as fast requires 9 times the power)

but i'm looking for a corolation between air and water resistance. i know that besides the fact that water fills a vessel to a level and air fills a vessel to an even pressure, there's virtually no differene in their behaviours. water is esentially VERY thick air.

can anyone find a relationship between the power required to travel a certain speed through air vs the power required to travel the same speed through water?

thanx,
speedfreak227

ok, it's been about 20 seconds since that last post and i remembered to search "priceless hockey" and found it.

thanx for reading both of these.

speedfreak227

god i love this "off topic" forum. very handy. i wish more boards had it.

anyway, i'm looking for a picture from sports illustrated (i think). the picture was mainly of a hockey player right at the net but in the stands behind him you could see to guys hugging each other in fear/anticipation of a goal.

the picture was HILARIOUS and i was telling some friends in university about it but we couldn't find it on google.

is there anyone out there that has it or can find it?

thanx,

speedfreak227

Quote from Frankmd :

So basically you have to write a paper about wear on birds? Or about how birds work, or...?

Maybe you should give us some hints first, so it is easier for us to search for you.

Btw, is that library really that small, or are your searching skills not up for the task?

sorry, it's more about how humans can learn about reducing/increasing frictional forces from solutions in nature.

no the library isn't that small. it's practically a world wide data base. the trouble is finding the correct keywords. so far i've been using:
tribology, animal, nature, friction, biomimetics.

different combinations of those sometimes give me 20000 results. if i reduce the search a bit more i end up with 3 results, none of which are appropriate. other friends of mine in the class have found papers for me while doing research on their own topics but there's NO WAY i would have found those papers with my keywords. those papers didn't use any keywords suitable for me. so basically i'd have to sort through hundreds of thousands of abstracts and just hope and pray.

another problem is that more than half the papers that i've requested from the library have come in CHINESE! why would you write an abstract in english if your paper is in chinese.

the funny that was when i went to see my teacher today. he's chinese by the way. i mentioned that half of the papers i've recieved were "like this" as i put the chinese paper in front of him. he thumbed through it for a few seconds.........read a bit............flipped a page.............read a bit more.................. then said, "OH! YOU CAN'T READ THIS!" hahahahahahha

speedfreak227

yes this is the kind of stuff i'm looking for, and i found more of it today. thanx.

i'll check the link you supplied later tonight, thank you again.

i'm sorry if i didn't explain myself very well last night but i was severly stressed. after talking with the teacher today i'm much more at ease.

some example of things i'm going to discuss are:
-dung beetle shell bumps which they copied on to bulldozer blades
-dolphin and whale skin ridges for creating laminar flow at the interface
-pangolin scales and how they protect it while burrowing
-insect and lizard attachment systems allowing them to walk up glass or on cielings.

thanks again for your help guys. i just got home from my class lecture and need a break from the topic but i'll come back to it again later.

speedfreak227

Help finding information on bionic tribology (friction) of birds and fish please

I'm writing a report for an engineering class on wear and friction.
my specific topic is:

Bionic Tribology: friction (living creatures in air and water)

i have been searching the university library databases for weeks for information but finding the correct keywords is proving to be quite difficult.

if anyone has an resources dealing with friction, aerodynamics, fluid dynamics, or anything somewhat related to those dealing with airborn or seagoing animals can you please send me links or pdf files please?

my time is running out and i simply haven't been able to find enough information. my paper is due Dec 1, 2005

if possible i would appreciate direct emails to [email protected] but replies in this thread will be fine.

i feel like i could just about vomit because about 20 minutes ago i realised that more than half of the information i've collected so far is useless because it's based on land animals. mostly snakes and burrowing animals.

thank you for your time,

Steve

it looks like some sort of AMC actually.

it's not a dodge, that's for SURE.

speedfreak227

Quote from Mazz4200 :

I just didnt realise how many wankers there are out there.

that was your first mistake.

THE WORLD IS FULL OF WANKERS

get used to it, or do what michael douglas did in "falling down"

speedfreak227

Quote from felplacerad :

warranty?

the trouble with that is the two best wheels that logitech has ever made are both discontinued.

although something i forgot to mention in my earlier post and i don't know if everyone's computer is set this way BUT....................................

when i hit "esc" to pull up the menus my force feedback turns off. you could just do that as a preventitive measure.

speedfreak227

Quote from skiingman :

Materials engineering, neat.

Would it be fair to say that when designing a force feedback wheel, you should design it so that the largest forces anticipated from either users or the motors will not stress/strain the materials past the endurance limit? The wheel is subject to reversed stress as well, not something I'd want to ignore in design.

yes that is fair, but then again why does anything wear out? you can't build everything to last forever, it simply costs too much. it's all about balance. it should last the average user a set amount of time under average conditions. shoes for instance, they could be made to last MUCH longer, but then to cost goes up acordingly.

given enough repeated light impacts most things will fail. on a side note: if you have a two door car with back seats, HOLD YOUR FRONT SEAT AS YOU MOVE IT FORWARDS! DON'T LET IT SLAM FORWARDS UNDER SPRING FORCE EVERY TIME. just because it doesn't break this time or the next 100 times doesn't mean it's not going to break next time. just a week ago i had a chair with a steel post fail while i leaned back on it. it was just a matter of YEARS of cyclic loading that stressed the metal and caused dislocations to form in the matrix. as more dislocations are formed dislocation motion is reduced causing the material to cease to be able to plastically deform. (FINALLY I CAN PUT MY ENGINEERING COURSES TO A GOOD USE! assuming i got that right )

a simple example of this is that little tab used to open pop and beer cans. if you just BARELY wiggle it it'll wiggle for a long time. if you bend it back and forth the full distance the metal isn't able to flex after a few full bends and it cracks.

Quote from skiingman :

Probably very true for sim-wheels. I don't know, but I imagine the bearings in automotive wheel columns are designed to cope with people using the wheel as a grab handle to prevent slipping in corners and to enter and exit the vehicle. I have a vehicle with 250k miles and the column is still quite tight and lash free. For that application, I can't imagine resting a 10lb load on it for a short period doing much harm.

Most of the mass produced sim wheels look super cheesy.

the bearings in a vehicle are designed to have a much higher fail safe load for obvious reasons. if your logitech wheel fails it's highly unlikely that you'll end up on the sidewalk hitting a nun walking with 13 orphans.

when firends are using my wheel if i see them leaning on it i ask them to stop. it is for rotating, not using as a lever.

after having my original formula force (best wheel ever!) fail i'm being especially cautios with my red momo formula force. (a steal on ebay by pure luck) though i'm quite happy it doesn't do the same start up calibration as the old formula force did. i'm also going to buy an old formula force from a friend who doesn't use his anymore and just put it in the closet for a rainy day. the last thing i want is to have to use one of those crappy mass produced ones.

speedfreak227

Quote from DodgeRacer :

I find it hard to belive the force feedback the wheel creates can actually damage it,

i had the ORIGINAL wingamn formula force. it lasted for YEARS. every time i booted up my computer though it would CRASH to each extreeme, far left, then far right. eventually from the shock loads the steel cables inside snapped.

any repeated shock load can cause stress build ups which will eventually cause a failure. (almost finished my materials engineering degree. could go into much more depth if anyone wanted)

and resting your chin on the wheel puts a load on the internal bearings that they were not meant to take. DON'T DO IT.

i agree it's a pain when people nail you after the race just because you're a target and it's not interfering with the race.

speedfreak227

Last edited by speedfreak227, Wed 16 Nov 2005, 06:11.

thank you.

now i've only got to move to england.

stupid north american broadcasters

speedfreak227

did a 1 year millwrighting program at BCIT (british columbia institute of technology), then a 2 year program at BCIT to get a 3rd class boiler operator's ticket.

worked for a few years, got my jouneyman millwright ticket.

now i'm in my fifth and final year of Materials Engineering at the University of Alberta in Edmonton.

speedfreak227

where in the world are the televising this?

i think it will be fantasticracing but i'm in canada and racing RARELY makes it on tv.

is there anyone who's going to be able to watch this tomorrow?

speedfreak227

Quote from AndyC :

You need to turn the Cut Throttle On Upshift option on tho

We can't have you cheating now.

i blipped off the throttle, if not it simply won't shift. (daylight video)

speedfreak227