undertray downforce LMP GTP

[wouterwolfs]

hello guys,

I am trying to design a lmg gtp but I dont no what is better;

What is better a radius to the flat bottom of the car,
or is a sharp edge to the bottom of the lmp gtp better likewise Ferrari F2003 GA.

Can you explain what is better a radius or a sharp edge for the total downforce.

wouter wolfs

[avsfan733]

radius is better because it compresses the air more smoothly creating less turbulence than a sharp edge

[THR]

yea 50mm rad i heard, off BARs aero guy.

so id go with that.
would guess it creates less turbulence

[avsfan733]

Ithink a progressively increasing radius might actually provide more downforce. It is something you really need to experiment with to get absolutely right

[Garp]

Which competition are you intending to compete in. (superlights?)

[MulsanneMike]

Radius of the bottom leading edge of the splitter? From what I've heard from the wind tunnel boys, a large radius creates a pitch sensitive setup. So your best bet may be a variable radius along the length of the bottom edge to get the best of both worlds.

[skycafe]

The pitch sensitivty would come from a consistant stall speed across the chord of the surface? A varying radius would also create different stall speeds and pressure along that chord, right? It is desirable to have something like the washout in airplane wings I would think, but then I am just sitting here drinking beer after a rotten work week, so what might I know?