a 'look' at Cd 0.0512
 

Stupid question; in lieu of long and skinny, what's preventing a team from doing a vertical airfoil shaped car?

Like the below but perhaps without the propeller.

https://www.hisour.com/wind-powered-vehicle-42672/
https://i2.wp.com/www.hisour.com/wp-...pg?w=960&ssl=1

preventing
 

A look at the rulebook would tell us. Something I've never done, so I'm kinda worthless to ya. Plenty of the members will agree.:p