Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

Piwoslaw · 09-10-2010, 03:42 AM

By creating lift you may lose traction. Good for slightly reducing rolling resistance, but horrible if you actually want control over the car.
You reduce weight, but not mass. Mass is what you have to haul up every hill, and what you have to pull each time you accelerate.And what tries to pull you out of the road when turning without enough traction (b/c you have too much lift, for example).
There are ways to create lift without a big ol' spoiler sitting in the airstream. For example certain rear hatch and rear diffuser angles will increase lift (Cz on the drawings below), but usually at the cost of increasing drag (Cx).

09-10-2010, 03:42 AM	#3 (permalink)
Piwoslaw aero guerrilla Join Date: Oct 2008 Location: Warsaw, Poland Posts: 3,760 Svietlana II - '13 Peugeot 308SW e-HDI 6sp 90 day: 58.1 mpg (US) Thanks: 1,355 Thanked 758 Times in 480 Posts	By creating lift you may lose traction. Good for slightly reducing rolling resistance, but horrible if you actually want control over the car. You reduce weight, but not mass. Mass is what you have to haul up every hill, and what you have to pull each time you accelerate.And what tries to pull you out of the road when turning without enough traction (b/c you have too much lift, for example). There are ways to create lift without a big ol' spoiler sitting in the airstream. For example certain rear hatch and rear diffuser angles will increase lift (Cz on the drawings below), but usually at the cost of increasing drag (Cx). __________________ e·co·mod·ding: the art of turning vehicles into what they should be What matters is where you're going, not how fast. "... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell [Old] Piwoslaw's Peugeot 307sw modding thread