D41 wrote:Aircraft are designed to fly. Spoilers on a vehicle are intended to prevent that from happening.
A vehicle is in contact with the road surface, has a suspension. tyres, etc.
"Even in a front wheel drive car you want your rear wheels to have the correct weight load for traction and handling". Fairly ambiguous at best....could mean anything.
Read the link he posted, it explains it for you,even a summary section at the end if you don't want to read it all.
[quote="It's a "Porch-uh""]To summarize:
Both wings and spoilers reduce up-lift at the tail of the vehicle, but use different mechanisms.
Wings are airfoils designed to directly deflect air upwards and thus push the rear of the vehicle down. They generally add quite a bit of drag.
Spoilers are barricades to undesirable flows, and thus are able to reshape airflow streams around the vehicle. This can help keep the rear of the vehicle down and decrease drag by changing the effective vehicle shape.
You need computational fluid dynamics and/or wind tunnel testing to quantify spoiler/wing performance.
Neither have any positive impact whatsoever on straight-line low-speed acceleration. Both are primarily intended to improve stability and cornering at high speeds.
Got it? Good. I'm tired of the internet being so consistently wrong about this.[/quote]
and the link again for good measure
http://oppositelock.kinja.com/wings-spo ... 1665312667