04-29-2010, 08:04 PM
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#11 (permalink)
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A True Z Fanatic
Join Date: Jan 2009
Location: GSO
Posts: 2,803
Drives: VIR
Rep Power: 189
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My aero coach sent me some homework to do!
Quote:
Some of the guidance I gave you previously was off base with regard to the splitter, gurney flaps, and underbody diffuser. I am putting together some trade equations so you can play around with what the impact on downforce and drag will be for the various options versus the cost. Can you send me the following information when you get a chance so I can develop the trade calculations:
1) what is the brand, model, height above deck lid, width (span), length (chord), and angle of attack you have your rear wing set to currently?
2) what is the width of the front splitter, the length at the centerline (chord), the distance from the leading edge to the ground, and the distance from the trailing edge to the ground when it is installed?
3) what is the ground clearance between the front clip without the front splitter installed?
4) what would the average ground clearance be if you installed an underbody tray (trying to get a feel for how much ground clearance you have on average)?
5) what is the average radial gap between the tires and the wheel wells for the front and also the rear?
6) what is the cross-sectional area of the "blunt nose" portion (~ perpendicular to the ground) of the front clip?
7) What is the cross sectional area of the tail section for a plane ~ perpendicular to the ground?
8) what is the approximate height and width of the "rear hump" on the deck lid we talked about shaving off?
9) what is the cross sectional area of the side scoop inlet ducts, what diameter ducting are you running now, and what is the size of the license plate cut-out?
10) what is the approximate cross sectional area looking from the front of the car that you would eliminate if you replaced the front headlights with contoured sheet metal (give to me on a per headlight basis)?
11) what is the approximate cross sectional area looking from the rear of the car that you would eliminate if you replaced the rear taillights with contoured sheet metal (give to me on a per taillight basis)?
12) what is the current ground clearance and length of the sections on each side of the car where you incorporate side skirts?
Also, if you can get the following information it would be helpful for assessing the dynamic stability and help with tuning the downforce between the front and rear of the car:
1) approximate current wet gross weight of car
2) approximate axial location of center of gravity as a percentage of the overall distance between the centers of the front and rear wheels
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