Le Mans 24 Hours Technical preview
05-24-2008, 12:54 PM
#1
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Le Mans 24 Hours Technical preview
Race Car Engineering
"The 76th running of the 24 hours of Le Mans is setting up to be a thriller, six cars capable of winning of two distinct designs. One a well proven winner, a traditional open topped prototype, the other a new faster coupe design which has proven more than a match for its older rival but a touch more fragile. These diesel fuelled racers are the only real contenders for overall victory but behind them there is a mind boggling array of prototypes and GT’s some having never raced before. It seems certain that there will be upsets and intrigue aplenty.
This event preview is a technical one-which is why you will not find much mention of driver line-ups or the politics behind the event. Please take the time to have a look at the links for each entry as we hope this will be the most comprehensive technical run down of the cars taking in part in what is bound to be a classic."
by Sam Collins
http://www.racecar-engineering.com/a...l-preview.html
"The 76th running of the 24 hours of Le Mans is setting up to be a thriller, six cars capable of winning of two distinct designs. One a well proven winner, a traditional open topped prototype, the other a new faster coupe design which has proven more than a match for its older rival but a touch more fragile. These diesel fuelled racers are the only real contenders for overall victory but behind them there is a mind boggling array of prototypes and GT’s some having never raced before. It seems certain that there will be upsets and intrigue aplenty.
This event preview is a technical one-which is why you will not find much mention of driver line-ups or the politics behind the event. Please take the time to have a look at the links for each entry as we hope this will be the most comprehensive technical run down of the cars taking in part in what is bound to be a classic."
by Sam Collins
http://www.racecar-engineering.com/a...l-preview.html
05-24-2008, 05:15 PM
#3
Safety Car
Interesting to see the Prodrive Astons run KONI 2812s... Mr. Popps shock of choice.
And for the Corvettes, anybody know about this?
And this:
And for the Corvettes, anybody know about this?
That downforce at high speeds also has implications for suspension performance, hinting at the potential benefits of a third spring arrangement on the rear anti-roll bar visible on the car at Le Mans. While the set-up was in plain sight, the team still doesn’t want to discuss its design and operation in any detail. However, with the team’s cars going to privateer teams over the winter, presumably those secrets will soon be difficult to contain.
The C6-R’s rear springs are in fact softer than those on the 2006 Z06 road car, he pointed out. This fact is another clue pointing to the use of a third spring arrangement on the rear sway bar that supports the car under high aerodynamic downforce at speed. Conventional Sachs dampers are used on the racecar.
Thanks Tom!
05-24-2008, 05:51 PM
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A friend of mine from England wrote this, Sam Collins. The comments about the corvettes are a bit off. He does not like the "Yellow Tractors". ( his words.)
I did not have the heart to tell him of his inaccuracies of his corvette review, until after the race.
I did not have the heart to tell him of his inaccuracies of his corvette review, until after the race.
05-24-2008, 06:41 PM
#6
Drifting
And for the Corvettes, anybody know about this?
Quote:
That downforce at high speeds also has implications for suspension performance, hinting at the potential benefits of a third spring arrangement on the rear anti-roll bar visible on the car at Le Mans. While the set-up was in plain sight, the team still doesn’t want to discuss its design and operation in any detail. However, with the team’s cars going to privateer teams over the winter, presumably those secrets will soon be difficult to contain.
Quote:
That downforce at high speeds also has implications for suspension performance, hinting at the potential benefits of a third spring arrangement on the rear anti-roll bar visible on the car at Le Mans. While the set-up was in plain sight, the team still doesn’t want to discuss its design and operation in any detail. However, with the team’s cars going to privateer teams over the winter, presumably those secrets will soon be difficult to contain.
05-25-2008, 02:36 AM
#9
A friend who knows someone at pratt miller has told me about the 5th spring and how it exists on the C6R. Here is a photo. I'm not totally clear on the entire piece, but you can see it is not a typical swaybar.
http://www.vetteweb.com/features/vem.../photo_12.html
You can also use a "z" type swaybar in which one arm is forward facing and the other rearward. Works a bit different than a sway bar. When the chassis is pushed down from rear downforce or if both corners are compressed at the same time in a bump it provides resistance. While I have not tried it there may be some advantage to a "z" bar over a sway bar in roll. Instead of lifting the inside tire it pushes it down.
-V
http://www.vetteweb.com/features/vem.../photo_12.html
You can also use a "z" type swaybar in which one arm is forward facing and the other rearward. Works a bit different than a sway bar. When the chassis is pushed down from rear downforce or if both corners are compressed at the same time in a bump it provides resistance. While I have not tried it there may be some advantage to a "z" bar over a sway bar in roll. Instead of lifting the inside tire it pushes it down.
-V