Blue, Just curious why then does all of Jack Costella's cars with their flat bottoms are so fast? Is it because of the top shape? Or?
The flat bottom of the Costella creation is so low to the ground that it eliminante the airflow effect which Eric explained.
But this is only possible if you run without suspension and you use the frame for the necessary twist during the run.
By the way - Eric - can you explain me the word "blunt" - sorry, for this word my English is too short.
And other thing - Al used a wing in August 2002 and slowed his speed down by 20 mph (5 percent).....using a wing, means to use the right shape...otherwise it works like a air brake