Impressive aerodynamic effect

Discussion in 'General Discussion' started by GaetanL, Jun 5, 2012.

  1. GaetanL

    GaetanL Registered

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    For me it's the first time that I see this kind of aerodynamic comportment in a simulator.
    A teammate who's work for Airbus is bluffed too. I'm programmer and I know how is difficult to simulate aerodynamics effects.

    There is a unpleasant side effect when you want exploit the ground effect with cars with flat bottom.
    When a lot of 'wind' go under car, you can flip yourself.
    Here an exemple at le Mans.


    In F1 they can flip too when they hit another car like webber at Valencia in 2010 (ground effect is less efficient in F1 that in proto due to a smallest flat bottom) (posted in second post due to limitation of video in same post).

    Here we can reproduce this comportment, need speed (300 Km/h) :


    I'm really impressed to discover this aerodynamic consequence in RF2, only me ?

    for ISI, if it's not a secret, can you give me more information about that ? (complete calculation, semi-scripted etc...)
     
  2. GaetanL

    GaetanL Registered

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    The Same effect to Webber at Valencia :
     
  3. Capeta

    Capeta Registered

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    I had an incident on Sepang.
    I hit a front wing another guy let behind him and I did something very close to what Webber does at Valencia. Impressive.
     
  4. zemaniac

    zemaniac Registered

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    yeah, I was surprised even in rF1 when, in a LAN dogfight with a friend of mine around Lienz, we both broke our F1 front wing and "took off" Webber@Valencia-style after climbing a hill...

    We were like the WTF Parrot in the "Penguins can fly" BBC video.
     
  5. Racefreak1976

    Racefreak1976 Registered

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    Now that this has been mentioned, I remember having seen something I didn't think much about.
    It occurred in an online race and if it's not a bug then this is a damn cool feature.
    There were cones falling over when cars were passing by at about 2 feet (or 50cm) away from them. I suspect it's because of air being pressed aside by the cars?
    Can anyone from ISI confirm this as a feature?
     
  6. Devin

    Devin Member Staff Member

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  7. mikeyk1985

    mikeyk1985 Registered

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    The Le Mans one is obviously ground effect as it's a widely documented problem but I would argue the single seaters are simply loosing the front wing and downforce imbalance from the rear wing is then encouraging the front into the air, Webber got catapulted by kovalainen's car, his floor wasn't involved to that great an extent.
     
  8. GTrFreak

    GTrFreak Registered

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    GP4 had this.. 10 years ago
     
  9. Devin

    Devin Member Staff Member

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    I loved this game! Not just good driving physics, also this was very good and the damage was the same... perfect! Even GP3 had this :D Would be nice if rF2 had better effects, even if it's okay like this :D
     
  10. mikeyk1985

    mikeyk1985 Registered

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    I do seem to remember my car lifting off going up into casino square in Monaco minus front wing...could be imagining things however, lol.
     
  11. 88mphTim

    88mphTim racesimcentral.net

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    Indeed. These kind of effects should be possible in any half decent aero physics engine. Nothing that surprising, it's been possible in multiple titles for a long time.

    But I think rF2 has more impressive qualities than blowovers, lol, I've seen multiple threads where people are noticing it for the first time though. So it's ok. ;)
     
  12. PLAYLIFE

    PLAYLIFE Registered

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    Dumbreck flipped due to the design flaw and setup (rake) of his CLR which transpired when it was in turbulent air. Not a condition you'd design an aero package to so it was a bit unlucky in that sense.

    The only time I've ever seen an open wheeler car flip with some front wing damage was a Formula 2 race in 1980 at the Nürburgring Nordschleife; Manfred Winkelhock came over Flugplatz and the car almost immediately flipped - that was more due to Flugplatz being a crazy crest rather than the aero effect of the broken front wing.

    You'd have to have a substantial angle of attack before the car flips, which most of the time would have to be cause by debris (Mario at Indy) or a large 'ramp' (Webber). Even the heavy kerb that Webber hit in Shanghai (mind at 200+ clicks) wasn't enough to flip the car.
    http://vimeo.com/40390372
     
  13. Rich Goodwin

    Rich Goodwin Registered

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    That shocked me, every logical (Or illogical?) fibre in my body said that the air going under his car as it lifted should of flipped it.
     
  14. Mr.Ferret

    Mr.Ferret Registered

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    Ironically webber also flipped that Mercedes sports car at le mans...

    twice...
     
  15. John.Persson

    John.Persson Registered

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    Except that he has front wings that sucks it down again massive. It's insane how much force they produce!
     
  16. Rich Goodwin

    Rich Goodwin Registered

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    Indeed, though given the angle of attack and speed I still thought it would go. Then again, if he braked that would help? (I don't know if he did)
     
  17. PLAYLIFE

    PLAYLIFE Registered

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    At the angle the car was the front wing wouldn't have produced any downforce, the wing would well and truly have stalled before reaching it's maximum angle of attack.

    I don't know how to explain why it didn't flip other than it being partly a function of the speed not being fast enough or enough of the flat underbody being exposed to the airstream for the mass of the car at that point in time.

    Either way, lucky boy this time around...
     
  18. GTrFreak

    GTrFreak Registered

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    You've got me interested.. Give us a hint
     
  19. jerrymcc

    jerrymcc Registered

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    rF1 does some of this pretty well already. I've had a corvette almost flip over backward when cresting a hill after losing the front clip.

    Also, in the hydroplane mod, Scott programmed the trailing boat to "blow over" if it crossed the wake of the leading boat too closely.
     

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