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Recent content by Olaaf

  1. Let's Talk Aero

    Yes, very very true- many people ignore what happens to the air after the inlet- for example, once it's ducted to the radiator or cooler, what then? What is the exit plan? You still have the same air mass as you did before the inlet, so the outlet is just as important.A waterfall style...
  2. Let's Talk Aero

    Only in conversation with RHR's aero consultant- he wanted us to close out the AI spec crusher splitter to the firewall to prevent air reversal into the engine bay. NASA AI rules wouldn't allow that (they have strict aero rules), however. The TT/ST splitter was designed for a flat floor and this...
  3. Let's Talk Aero

    Correct- i don't know.Not quite true, ever buy a real carbon race splitter or diffusor, or seen one on a pro car? The molded side is the "shiny smooth side" and is always presented upside down, that is, the smoothest side of the part is presented to the underside (in the case of a splitter or...
  4. Let's Talk Aero

    haha, i wish. kind of the opposite.
  5. Let's Talk Aero

    It's immaterial, but no, i removed them when building the flat floor and side skirts, replaced with 10/32 hardware and rivits.
  6. Let's Talk Aero

    I can't throw out numbers without knowing the car, wheel width, brake rotor size, ride height, camber, splitter, canards, etc. Then i would need to model it. I don't like guessing that much. 10/lbs of what? DF? DF net? or DF over the front axle? drag? force is force.I can say that when...
  7. Let's Talk Aero

    It's not validation, it's correlation. I said i don't know what the impact would be. OK, just checked my mustang. No plastic push pins. 10/32 screws and rivits from the aluminum skirt to the plastic rocker, and then to the steel jacking rail welded to the pinch/rocker.Most definitely. When...
  8. Let's Talk Aero

    I don't know.. It's possible pressure drag might be decreased due to a slightly better vented front wheel well, on the other hand skin friction drag might go up with the removal of the plastic sculpted pieces? Could go the other way, though. I'm pretty sure the skirts are held in place with...
  9. Let's Talk Aero

    Yes on fender venting, very good upgrade right there. If you already have a splitter, check out RHR's new tunnels. You can jigsaw out your existing splitter and add these tunnels. It won't give you massive gains of the full crusher spec splitter, but you def. get more front DF. The other thing...
  10. Let's Talk Aero

    I don't *think* so. There is nothing special happening under the car that you want to keep in or out, unlike the Chaparral 2J fan car. The material also might end up fluttering quite a bit, might add a bit of drag.
  11. Let's Talk Aero

    You are comparing the concepts of designing a fighter jet to the concepts of designing a passenger airliner, or it you would like, an executive jet. Yes, F1 cars make the majority of the DF from the floor, but you cannot take F1 concepts and apply them apples to apples to a production coupe...
  12. Let's Talk Aero

    This is the "road racing" section of the site.. The stock skirts are not for downforce. Do the impact aero? Yes, of course- everything does.. Is it optimized for fuel economy? maybe. Is it optimized for aero acoustics? maybe. is it optimized for looks? maybe. It's not designed for DF.These...
  13. Let's Talk Aero

    Yes, of course they do, my point was that "simplification" of a CAD model means removal of logo's and bolt heads, bleeder screws on brake calipers (in my CAD model, 68 faces per screw) and things of that nature, not flow paths.
  14. Let's Talk Aero

    My advice is to close it, keep it simple. Without modeling the gap or testing it, you'll likely end up with vortex streets/shedding from the gap and the vortex generated over the cap. Lose the canard, without a negative pressure gradient it probably won't do anything, except adversely interact...
  15. Let's Talk Aero

    Sorry, but you would be mostly wrong. You can't find YES/NO, black and white answers, because everything impacts everything. You need to understand some theory, and then go out and apply that theory by testing it (in the digital domain or other). Here is a good primer, but you need a good...
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