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HomeOff Topics › Zonda roadster
02-11-2006 07:22 PM  12 years agoPost 21
spritefiend

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Camarillo, CA

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is it still downforce if its upsidedown??

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02-11-2006 08:37 PM  12 years agoPost 22
Topher

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Rochester, Michigan

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Sprite I have no idea. And Wasp I have heard that also although I dont think they run that the airfoils and such aggressive angles because of the drag. And yes Im sure that car did hit a curb or a squirral or something.

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02-11-2006 08:55 PM  12 years agoPost 23
Gearhead

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Vt

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"is it still downforce if its upsidedown??"

that's what I said "downforce"

Jim

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02-11-2006 09:14 PM  12 years agoPost 24
RappyTappy

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Traveling the USA

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Topher, Yes, they do run such a high downforce because of the speeds at which they take turns. There is drag, but modern F1 engines produce over 900 hp. They balance out the drag vs speed to get the best of both worlds. Not enough downforce, and they can't handle fast turns as well, too much downforce and it slows them down in the straights. It's just a balancing act.

Regarding the Zonda's downforce, I quote this from a mag.
" The ZONDA is far from this kind of thinking and is admired by the real car connoisseur because it offers a completely different experience. Road stability is excellent and is made so by the first-rate suspension system and the rigid frame as well as the efficient aerodynamics of the body: at a speed of 200 km/h the downforce is equal to a load of 100Kg at the front and 130Kg at the rear."
The Zonda creates downforce by utlitizing air that gets sucked up from the front, and routed to through venturis to produce downforce. (the rear triangle is part of a venturi) This adds LOTS of downforce.

Look at this georgous engine shot and the suspension is just awesome

A supercar with a full and plush interior, who woulda thunk it?

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02-12-2006 02:55 AM  12 years agoPost 25
Gearhead

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Vt

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so basically it's a street legal Can Am car

Jim

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02-12-2006 12:56 PM  12 years agoPost 26
Roger Hamilton

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Surrey, England

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Most of the downforce on modern race (and high performance) cars is created from controlling the air underneath the car.

This is the point of front splitters (deep spoilers) this reduces the amount of the air entering the underside. You then use a rear venturi (swept up rear underside) to expand the exit point of the air under the car. This then creates a partial vacuum which equates to down force. The faster you go, the more downforce you create.

It is very hard to replicate this effect on a road car as it will have to deal with curbs, uneven roads etc, so the ride height will have to be higher, which dramatically reduces the effect.

It is easily possible for an F1 car to 'stick to the ceiling'. Speed and grip are controlled by the FIA through defining ride heights, and underside dimensions.

Colin Chapman (Lotus) was basically responsible for discovering and harnessing this effect on race cars. His initial system used a 'skirt' around the car which created phenomenal levels of downforce.

These skirt systems were banned because the effect was too marked. If air found its way under the skirt, the reduction in down force was sudden and dramatic and the driver faced instantaneous loss of grip and control.

Cars like the Pagini, Ferrari etc do utilise these principles but they are designed to offer safe downforce enhancement over a variety of surfaces etc to counter a car's natural tendency to lift at speed.

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02-12-2006 10:11 PM  12 years agoPost 27
Ed Moore

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West Sussex, UK

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Well guys, keep an eye out for the Top Gear Winter Olympics. Imagine what happens when you fire a mini down a ski jump using rockets.

It was super

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