Maximum height of any wing as measured vertically from the trailing edge of wing to ground is 90 inches (2286 mm). Trailing edge of rear wing may not extend more than 50 inches (1270 mm) behind centerline of rear axle. Combined total area of rear wing (total of all stages and/ or elements) is restricted to a minimum 1,450 square inches (9354 cm2) and a maximum of 1,500 square inches (9677 cm2). Wing configuration limited to one only, with three elements, and must be FIA Drag Racing Commission accepted for competition. SFI tag must be affixed to the main wing element, on the underside, adjacent to the right spill plate. Rear wing supports must meet SFI Spec 2.3P. Mud flap may be located in front of or behind exhaust headers. Maximum 1.25-inch (32 mm) lip for stiffening permitted. Leading edges, fairing in or rounding off corners, etc. Air deflector plates located behind cockpit restricted to maximum 17 inches by 17 inches (432 mm by 432 mm). Ground effects include, but are not limited to, rocker skirts, belly pans, sheetmetal work under the body that produces a “tunnel” for the passage of air, etc. Its a long document so I have picked out a couple of things of interest for Top Fuel Dragster aero: Ground effects of any description prohibited. The dragsters have a long nose full of ballast so wheelspin is actually a bigger problem than lifting the front. I assume its so high and far back to get it away from the dirty air off the tyres and exhausts. I don't know much of the rules though, perhaps the rear wing has to be behind the rear axle or something like that. If the rear wing was further forward it would lift the front wheels less and so the front wing could be smaller, so less drag. My point was that the position of the rear wing acts to lift the front wheels by pivoting about the rear wheels. I'm certainly not, I know they have a big front wing as well. I think you're missing the big front wing that they also use. I'm probably just being stupid or missing something obvious though. With top fuel dragsters I have always wondered why the rear wing is behind the rear axle, the big challenge seem to be keeping the front wheels on the ground so having the rear wing behind the rear axle makes the rear wheels a pivot point to lift the front wheels when there is downforce and drag on the rear wing? Surely there is a point somehere along the length of the car where the intersection of the downforce and the drag is acting almost 100% on the rear wheels and leaving the front wheels neutral? its easier to understand the 'why' when you know the 'must' Top fuel is an FIA series so there should be a readily available rule list. Facts Only wrote:My first port of call would be to look up the actual rules.
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