Pictures of the Cheesiest Chit ever!!!
- Thread starter OVERKILL 19
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Brian D.
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Stompin Tom
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Kinda reminds me of my dog trying to bring a big stick into the house.
Summiteer
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Jared on his way home from Subway......
AreWeThereYet
Active VIP Member
Have to give the rider credit, at least he flagged the ends for visibility.
growly
Active VIP Member
They had too wait for the mexicans to build the ford and chev. engines first.
Which 2? there's only the ZL1 coming.... a Z28 is still just rumors, who knows if it will ever happen
byronkentgraham
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You're up UD
clint/KTM/16
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Summiteer
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Saw this coming from the casino today
Are you talking about the car or the gost that seems to be peeking in the window.
Junior Highmark
Active VIP Member
Does a spoiler not put downforce on the rear wheels for cornering?
why would a fwd car need one other then looks?
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why would a fwd car need one other then looks?
Sent from my Nexus S using Tapatalk
byronkentgraham
Active VIP Member
Look...thats the only reason anyone has them.
jdawgtherigpig
Active member
- Moderator
- #977
Bogger
Bogger of the GBCA
Wings on FWD cars:
Misconception: It is effective at moderate speed.
The wing wont keep your front tight on the ground in any real difference whatsoever. It creates downforce over the rear wheels so that in a RWD car it provides better traction/stability.! Any downforce provided on the front wheels is far exceeded by the force applied to the rear of the vehicle.
Unless the FWD car has a mad front spoiler like an indy F1 car or huge tunnels under the car or something creating the Bernoulli effect, traction provided by downforce will not be extensive.
Here, I'll get a bit more tehnical for you just so we can all fall in love with science.:
We can start off with the theroy that The Aerodynamic efficiency of a car is determined by its Coefficient of Drag, I will refer to that as (Cd).
The Coefficient of drag is independent of area, it simply reflects the influence to aerodynamic drag on the shape of object.
For example, Theoretically a circular flat plate has Cd 1.0, but after adding the turbulence effect around its edge, its CD becomes nearer to 1.2.
For those who care, the most aerodynamic efficient shape is a water drop, whose Cd is 0.05. However, we dont all run out and build a everyday street car in this shape so a typical modern car is around 0.30 (Cd).
Actual drag is proportional to the drag coefficient, frontal area and the square of vehicle speed.
Hence a car going at 80 mph has 4 times the drag of a car traveling at 40 mph.
This influences the top speed. If a company needed to raise the top speed of Car with 390hp and a Cd of 0.36 from 180 mph to 200 mph without altering its shape, it would need to raise its power from 390 hp to about 535 hp!
or the company can blow far less time and money on engine and drivetrain improvements and use it in the wind tunnel, advancing its Aerodynamics. All the car manufacturer would have to do is decrease its Cd from 0.36 to 0.29. This would achieve the same result without having to put in a beast of a motor.
And Lift, just so we can get everything on the table:
Like I mentioned about drag, lift is proportional to area (but total surface area rather than just frontal area, the square of vehicle speed and Lift Coefficient, and so I'm going to make that easy and call it (Cl), which is determined by the shape.
At high speed, lift may be increased to such an extent that the car becomes very unstable. Which is really not what you want to happen now is it.
Witness Mercedes
Group B Racers doing the loop de loop at Le Mans to see what becomes its obvious conclusion. We've all see the video of the Mercedes that does the nice lift off and backflip into the trees at the LeMans a few years back.At more mundane speed Lift is particularly serious at the rear, since a low pressure area exists around the rear window, kinda like a waterfall churn. If the rear lift is not adequately countered, the rear wheels will not provide adequate grip and the car will go into Over steering mode, just the opposite of what is required for good Stability. This is why in most cases huge wings on a car dont make much diff at speeds less than 160km/h, or 100mph for the americans on the forum.
Even worse, a Fastback design is particularly bad in this aspect, because it has a very big surface area in contact with air flow. Porsche introduced the big Whale Tales to nullify this.
Paradoxically It would seem that achieving good drag and low lift are mutually exclusive, Its all a big trade off, Automotive race teams do it all the time trading top speed off against cornering grip. There are however are some solutions to help achieve a good balance of both, its just a matter of R&D to see what works best for your car.
Okay, so now we are all filled in on how Lift and drag works.
Unless the fwd car has a wild body kit providing some downward force to the front wheels, its not much use to apply a massive spoiler, or any spoiler for that matter.
When it comes to cornering at high speeds the spoiler can be effective on a FWD car, keeping the ass end planted better and stabilizing an oversteer situation and having the car spin out. This is of course only really effective at speeds greater than 160 km/h
- Moderator
- #978
Bogger
Bogger of the GBCA
I stole that from another forum.... I don't have that much time on my hands...
jazzman
Active member
Just fits smart or what!
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