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The purpose of this paper is to discuss some of the major aero-

dynamic feature c n O Hl the Daytona and the Engineering approach used in

evaluating thes features. Specifically, the effects of the front end

modifications, backlight modifications, and rear deck stabilizer system

are evaluated individually and as a total package. Wind tunnel tests of

scale models were used extensively in the development of the vehicl C D

and the initial portion of this paper discusses the wind tunnel techni­

ques and philosophy employed.

ENGINEERING APPROACH

The program which resulted in the Charger Daytona used both wind

tunnel and track testing as primary development tools. In addition to

the tunnel tests, which are the focus of this report, considerable

vehic over-the-road testing and development work was done by the

Chrysler Proving Grounds Performance Analysis Group. Throughout the test

program there was a considerable interchange of ideas, suggestions and

information between the tunnel and track groups; this approach proved

to be quite beneficial since many of the problems encountered proved to

be more amenable to solution by track methods as opposed to tunnel

methods and vice versa.

TEST FACILITIES - The current wind tunnel tests were conducted at

the Wichita State University 7 x 10 foot wind tunnel and the Lockheed-

Georgia 16 x 23 foot wind tunnel; both tunnels are of the horizontal,

single-return, losed throat design. Rather extensive development tests

were conducted at the Wichita facility while the Lockheed-Georgia tunnel

was used primarily for tunnel to tunnel correlation studies on the 3/8

-3-