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approximation of the optimum backlight found in the earlier tests.

RECENT RACE AERODYNAMICS DEVELOPMENTS AT CHRYSLER

The recently introduced race version of the Plymouth Superbird, a

specially modified 1970 Plymouth Road Runner, incorporates many feature m

that are n imilar to those found on the Charger Daytona. Front end and

backlight areas have been modified and a front spoiler and rear deck

stabilizer ystem added to the basic car. As a result of the confidence

acquired during the Daytona development, wind tunnel scale model tests

were used almost exclusively in the development of the Superbird.

CONCLUSIONS
The results of the Dodge Charger Aerodynamic Development Program

lead to the following conclusions:

1) The Daytona Aerodynamic Package meets the goals of the
Program; i.e. lap speed increase of 5 MPH and improved
handling qualities.

2) The streamlined front end - front spoiler combination is
a highly interactive aerodynamic system which is an
effective reducer of front axle lift and vehicle axial
force.

3) A backlight angle somewhat less than a full fastback re­
presents an optimum from an axial force and rear lift
standpoint.

4) Changing the posi ion of the front undernose spoiler
rt
changes front axl D C lift significantly with a minimal axial
force penalty.

5) Small changes in vehicle attitude affect the vehicle aero­
dynamics significantly.

6) The front undernose spoiler is much more effective on
v i treamlined front ends than on blunt front ends.

7) The Daytona rear deck stabilizers are of significant benefit
in controlling vehicle lift distribution and improving
directional stability.