Page 17 - Combined_73_OCR

spoiler has been mounted 13” aft of the nose leading

dge at a 45° angle to the ground.
G J
3) Backlight Modification - The rear window or backlight

lope has been changed from approximately 45° to 22

from the horizontal and the side window to backlight

junction has been faired.

4) Rear Deck Vertical Stabilizers - Two fixed symmetrical

vertical stabilizers have been mounted at the rear of

the rear fenders.

5) Rear Deck Horizontal Stabilizer - A 58” 71 pan, 7^” chord

aerodynamic control surface has been mounted CM co A" above

the rear deck between the vertical tabilizers. An

adjustment range of +2° rr O o o is provided.

Items 1, 2, 4, and 5 will be referred to as the Daytona Aerodynamic Pack­

age since they represent changes from the 1969 race car. Item 3, al­

though different from the standard Charger, is a carry-over from the

1969 race car. Figure 4 presents the 1969 race Charger and the Charger

Daytona illustrating the configuration modifications.

The aerodynamics of the 1969 race car and the Charge Daytona, as

function of yaw angle, are presented in Figure 5. These data indicate
cd
axial force is reduced by 16% at zero yaw angle. This reduction in

axial force represents approximately a 5 MPH increase in lap speed at

the Daytona Super-Speedway. Front axle lift is reduced by 66% at zero

yaw while rear axle lift did not change. Notice the total lift co­

icient for the Daytona, i.e. front axle plus rear axle, is zero or
a )
ightly negative while the total lift on the 1969 race car is positive.

These data were verified during track tests where it was observed that

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