Plastic Shield Under Front End

[oab_au]

Originally posted by Chiketkd

Found it Harv...

Click on pic #72: http://www.svx-iw.com/svxiw/road_track/index.html

I quote: "While achieving a breakthrough Cd number was never a must-do goal of the 23A project, the body engineers were also determined to at least equal the wind tunnel performance of the XT6. In the final tally, the U.S. version of the SVX comes in at 0.29, same as the sharp-edged XT, offering dramatic proof that all cars which have been refined in the wind tunnel don't necessarily have to end up looking alike. The European-spec car proves to be slightly better, at 0.285, due to a larger undertray below the engine."

-Chike (my 4500 posts are not pointless or random btw...)

Well I think I would use a more technical source than Road and Track.

I have to disagree with it again. They get things confused, and then print it as fact. They mix 'wind tunnel preformance' with Cd., they are two different forms of measurement.

The Coefficient of drag is based only on the frontal area of the vehicle with a constant to account for the type of vehicle, bike, car, truck etc. This a straight forward mathematical calulation. It does not include anything else like under trays, smooth shape or the rear end,

Wind tunnel measurements are carried out with the vehicle, suspended in a air flow, the air drag on it, is then measured. This measurement is effected by the shape, smoothness, rear end, etc, of the vehicle.

I went out and looked at my front undertray, it does end at the front of the sump, the same as yours.
If there is a difference in the Cd of the two models, I think it would be due to the folding side mirrors that they have, as this would affect the Cd.

Harvey.