forty-two wrote:speedsense wrote:
Forty Two,
I posted this in the Formula one cars thread for the RBR accidently. In the photo ***note the two square tubings that would proceed the location of the splitter. Imagine a smaller insert tube mounted to the splitter that inserts into the tube to mount the splitter. This tube could be made to slide in and out and flexible when out. It won't need to move much, just enough to expose the flexible portion. It could have some sort of activation device from within the cockpit. In for the static tests, out for running. Kinda goes along with your theory.
Having built a few splitter's for Atlantic cars, this mounting on the RBR and the location of the square tubing, makes me curious. I do think that it would aid a fast removable of the splitter, ie to swap it with another in a hurry but I have never seen a mounting like this... And from the video at Singapore, is the apparent flex point upon hitting the curb...very interesting....
![Image](http://www.formula1.com/wi/597x478/sutton/2010/d10kor1743.jpg)
Interesting idea, indeed the simplest way I can think of having a setup work like this would be to have some sort of articulation of the driver's seat whereby when the driver's weight is on the seat, a locking pin is withdrawn allowing the splitter to move, and then during scrutineering (when presumably the driver is not in the car?????) the pin is in place holding the splitter still.
I don't however think that this is the explanation for the square holes you see in this picture, instead I believe that these channels go all the way to the back of the car and augment the diffusor. Take a look at the following picture of the Ferrari and I think that they're doing something similar:
![Image](http://www.formula1.com/wi/597x478/sutton/2010/d10sin454.jpg)
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The "channels" you see on the floor of the Ferrari are for strength for the stepped bottom and the form of the carbon floor, IMHO. They are the width of the tub. This is quite common in full one piece floors seen else where (IE, Indy car, ALMS,Indy Lights)
The tubing on the RBR seems to go inside the tub, as you can see when zoomed (300%) the plank has broken off (notice the shards of jab roc), and shows the breakage, however the floor above the plank (also can be seen) doesn't appear to have damage but rather appears to stop there (the floor being carbon and stronger than the jab rock plank),would have strands of carbon hanging about when broken apart), it never breaks that cleanly unless you cut it.
According to the static tests rules, the splitter is considered bodywork and is tested as such vertically at 2000N @ 5mm flex at 350mm aft from the rearward postion of the center line of the front wheels. The lower bodywork must stop 330mm aft from the front wheel center The regulation doesn't include up or down direction (implies either direction), but the test indication is an upward ram supplying the force.
The Singapore video clearly shows a lot more than 5mm of movement (30-50mm,IMHO) and a non bending motion "but a hinged one", again IMHO, and judging the location of the car, is through one of the four chicanes at Singapore putting the cornering speed somewhere between (85-135 Kph, IE-low downforce). So most of the forces acting on the splitter are the weight of the car (1300+lbs) and given the amount of movement of approx 50mm puts the force needed to move the object above 10KN (2248lbs) or some 700-900 lbs (depending on fuel) above the car. That leaves mostly the force of the curb hitting the splitter speed related (again we are talking a low speed corner).
IMHO, there's no doubt that the splitter is taking a hit that is much, much lower in forces than what the splitter "should" have been designed to take and not move, flex or break (IE hitting a curb at 180 mph, with high down force)
The RBR should have lifted the front wheels off the ground with this strike of the curb and that didn't happen, IMHO.
To go just a little further in my theory (and forty two's), the limiting factor for a lower ride height would be the splitter (with rake considered) and further more having the splitter move up WITHOUT resistance (thus not wearing the plank), would allow a much lower ride height than is achievable with a "solid, not moving, splitter."
"Driving a car as fast as possible (in a race) is all about maintaining the highest possible acceleration level in the appropriate direction." Peter Wright,Techical Director, Team Lotus