[aerohead]

Some members are having a time arriving at an accurate frontal area for their vehicle.
Here's an obtuse method from the Motor Industry Research Institute (MIRA) in the UK.
It requires a laboratory grade scale.
Here's the nuts and bolts of it ( and I apologize if it's already been mentioned elsewhere).
A telephoto image of the vehicle is taken with a very "long" lense on the camera and from great distance.The photo can be taken from ahead or behind the vehicle."Frontal" area of a vehicle is really erroneous and has nothing to do with the front of anything.
It would be the area of the shadow of the vehicle cast by sunlight or laser light from front or rear,cast onto a perpendicular surface.
When the photo is taken,a plate,1-foot-by-1-foot,or 1 meter-square is mounted on the vehicle any place convenient,as long as it is also perpendicular to the camera.
The image is enlarged and printed at a convenient scale.
The image of the vehicle is cut away from the surrounding part of the photo and weighed on the scale to get the total "area" weight.
Afterwards,the "square-foot" or "square-meter" is cut away from the vehicle image and weighed by itself to establish it's respective "weight."
By comparing the "weight" of the vehicle to the reference weight,you can establish the frontal area.
This is basically how "Pi" was determined(using the weight a uniform wall-section metal sphere).
You need a very accurate scale.