Grip

Discussion in 'General Discussion' started by slo, May 22, 2013.

  1. zenrael

    zenrael Registered

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    Come on, are you really going to insist that having real life racing drivers involved in testing means nothing? Seriously?

    How then, do you expect to accurately model your environment?

    Unfortunately, todays computers are not capable of modelling real-world physics on the fly to the kind of precision that render such testing useless. The best approximate models are used. They are deemed accurate if they yield expected results. So what then, are the expected results?

    Statistically, the best way of verifying the accuracy of your model is to trial it on a sample population of people familiar with the modeled environment. I have never driven on a track, I have never driven a car more powerful than a road-legal 1.6. I have relatively little authority on track grip levels when contrasted against an experienced racing driver, with hours under his belt in various cars of a similar size, weight, and characteristics.

    Please explain how you would have the developers verify the accuracy of their model, without calling on professional drivers.
     
  2. Esteve Rueda

    Esteve Rueda Registered

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    Ooops, sorry :eek:
     
  3. Sofo

    Sofo Registered

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    Real life drivers are the only who knows how racing feels. Having them involved in development must be great, if they can communicate their knowledge
     
  4. 88mphTim

    88mphTim racesimcentral.net

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    A difference in FPS affects the human perception and reactions a lot more than it would affect the software... lol
     
  5. 88mphTim

    88mphTim racesimcentral.net

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    It COMPLETELY depends on the type of involvement, and the driver involved. Some real drivers just don't 'do' racing sims.

    It is absolutely possible to verify information without professional drivers, using data, and as long as you have a sim racer who understands the complete concept of driving a race car (few do, or are even capable, including me). For example if you have a sim racer who can be matched on telemetry and be seen to drive a car the same way a real world counterpart does (again, few do). This is why paying some driver to hold your logo and say how awesome it is, doesn't help a product quality, just it's sales. Saying that though, the feedback of a real driver is actually incredibly important for things like grip on a green race track. I'm frankly amused by this discussion, it's like nobody watches F1 FP1 sessions all season.
     
  6. sg333

    sg333 Registered

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    I worded that badly. I mean its not guaranteed to end up with a quality similation, as in the example I gave :) . As someone else said, maybe they cant correctly communicate the problems, or are too keen to just give a thumbs up and take the cheque/get out of there.
     
  7. tjc

    tjc Registered

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    :cool:

    Good to know Tim.

    lol :p

    :)
     
  8. Dennis May

    Dennis May Registered

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    I can't see any problems with grip. At Sebring with the Nissan GTR, once I felt it was too much grip on the track after 30 cars rubbered the track.

    Think everything is fine here, beside the 60s cars should not produce that much marbles :X
     
  9. Ronnie

    Ronnie Registered

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    " FIA F2 grips. Same with the Megane." Huge downforce. ", "Corvette and Nissan" not many aerofoils. Depending more on mech grip.

    So can't really compere them.
     
  10. Kknorpp001

    Kknorpp001 Banned

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    As soon as they forget everything they know about physics.


    Sent from my iPad using Tapatalk HD
     
  11. Rich Goodwin

    Rich Goodwin Registered

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    That's all good mate. I just like to know about testing processes and how you guys get feedback etc.

    I respect not name dropping and understand what you're saying on that.

    Don't get my initial statement wrong, I love rf2, just want to learn more :)

    Cheers for the reply

    Sent from my Nexus 7 using Tapatalk HD
     
  12. Jameswesty

    Jameswesty Registered

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    The problem is not the levels of grip of a given road , Its that the cars don't drive like real cars when they lose grip or are at the limit of grip.

    ISI seem mostly oblivious to this , don't care , or dont know how to design there cars to get around this issue.

    If you play GTRE or game stock car ( both games use ISI technoligy) you can instantly see that the cars behave far closer to what you see with real world cars when driven on the edge of grip. (Mind you other aspects of the simulation are way off in GTRE)

    Net kar pro FVA and the AC tech demo are also very good examples of how cars drive at and on the limit as well as at low speeds with high cornering velocities .

    So in the end even if ISI made the track more or less grippy you will still find there cars are fundimelty flawed to drive at the limit.

    In the end the ISI technology works very well within its defined parameters but outside of them its just pot luck.

    Simracers that drive to top level Drive RF1 and RF2 buy memorising the limit and then staying under that limit not by feeling out the state of the car through the FFB or easing onto the tire grip.
     
    Last edited by a moderator: May 24, 2013
  13. Minibull

    Minibull Member

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    This is the part I'd love to know more about :D

    I understand about the endorsement thing too. Guess some racers may just send you their impressions if they play it in their spare time, but are in no contract or being paid anything.
     
  14. Kknorpp001

    Kknorpp001 Banned

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    I can't read any more of this crap. You guys are insane if u think is ice. Learn how to drive for crying out loud. And u also have to look at actual speed in corners. Duh.


    Sent from my iPad using Tapatalk HD
     
  15. 88mphTim

    88mphTim racesimcentral.net

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    I don't believe anybody is oblivious to your issues. Perhaps they just don't agree.
     
  16. Miro

    Miro Registered

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    Which parameters are you talking about exactly?
     
  17. baked bean

    baked bean Registered

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    Its easier to call it a flaw than to adapt & overcome, its the same grip level for the dude in front & behind you ;)
     
  18. Rony1984

    Rony1984 Registered

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    I feel that a lot of people are forgetting that a good tire model can produce good results when it's fed with the right data. Even with the most advanced, comprehensive model, if the inputted data concerning adhesion/cohesion, slip angels etc is not correct, so will be the result.
    ISI/Tim has stated in some post that also ISI, like everbody else, has to learn by doing to produce the best possible tires, and hence these will be improved upon all the way during rf2 development.
    And then there is the tire model at itself, which as can be seen in the known issues file, is not finalized..
     
  19. 88mphTim

    88mphTim racesimcentral.net

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    Most of us (me included) do almost everything completely wrong. I'm perfectly capable of going fast when I put enough time in, and staying on the track, and always have been with every sim. My personal flaws are highlighted, multiplied and shoved in my face right now with this product, and I'm essentially trying to teach myself to drive from scratch right now. I am hoping that eventually there can be a step by step guide to the simple things.

    We have had offers. Drivers who use our software offering to be a spokesperson, we might do it eventually, but I don't think I'd ever want to do anything paid, so we can truthfully say we didn't pay them anything when they endorse us.
     
  20. 88mphTim

    88mphTim racesimcentral.net

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    We will always be tweaking. However, belief right now is that you are on the nicer side of both grip and tire wear right now compared to the worst in real life. :)
     

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