st205 wing?

[ihavelift]

I was having a read of the build thread of Lee's car and I noticed a lot of hate on his wing (haters gonna hate ... but yeah I'm one of those haters) .. I hate wings that aren't factory. EDIT - but yeah if you like it go hard but I'm sure I'm not the only person who thinks it would look SO much better without...

I noticed one of the first comments related to the downforce created by the wing at higher speeds due to it not being parallel to the road. Now I understand a bit about downforce etc but is an st205 wing really necessary? I get the sneaky suspicion that not only does it look kind of lame (IMO), but it was also put on at the factory stage just as a tribute to the WRC car and really there's no use for it, in fact it's just a hindrence.

What are the opinions out there? Having been looking for something to push me over the proverbial edge and de-wing the gt4 for a while now.

Thoughts?

[Akane]

It's more complicated than it is.

Firstly, are you talking about spoilers or downforce wings / planes?

Spoilers are actually used to spoil the left created by the shape of the car, if you look at the car from side on it's actually shaped like an aerofoil, and the rear has a lot of low pressure. You have a spoiler to SPOIL this lift created, not create downforce.

And second you get these "wings" that gives downforce, which itself is actually an upside-down aerofoil. A lot of science behind it with the shape of the aerofoil, the problem is that a lot of "Look at my phat GT wing yo!" is actually not an aerofoil but more like a flat surface mounted on an angle, this creates a lot of drag, and being damn ineffective.

Also there's the angle of attack if you have an aerofoil type wing, because if you exceed a certain amount of AoA, you get no lift (in this case, inverted lift = downforce), but you get a lot of drag (as the aerofoil have stalled now).

Anyways, after my long assignment of blah blah blah, you have to firstly find out what your ST205 thing at the back of your car is. Is it aerofoil or a spoiler?

Then you can go from there onwards.

Oh, and about your buddy's car that you've mentioned. All I can say is LOL.

[XS1V]

"The outside body shape has been cleaned up to improve the drag coefficient, as well," explains Dieter, "but the main difference is the wing, which allows more down-force at the rear.

The purpose of the rear wing is to correct the inherent balance disadvantage of a transverse-engined car compared with longitudinal-engined models like Fords and Subaru's. The aerofoil has been designed to minimise drag losses while still increasing the downforce and it is effective from 100-120 kph upwards.

"We get better traction and it makes the car more stable. The wing has two positions, up and down, with removable distance pieces. In the Japanese market it will be sold with the wing in the up position and the pieces in place, but to help transport the export cars the pieces will be removed and stowed in me boot ready to fit on arrival. "We are expecting to sell around 2500 examples in Japan alone with the pieces in place. The amount of downforce is influenced by ride height and we still have to carry out wind tunnel tests, but it's expected that there will be 50 kg of downforce at 100 kph with the wing in the up position, and maybe five times more than that with the wing at the low position."

http://homepage.virgin.net/shalco.com/tte_ST205.htm

Brad

[ihavelift]

shit i have no idea if it's an aerofoil or a spoiler ... i'd say spoiler? at a guess. It's standard.