Quote:
Originally Posted by Phase
Did a Julian Edgar style box cavity as a test on back roads. Car felt less draggy. Wasn’t really able to flare the side inwards to reduce wake size and no hard measurements. But I was surprised it stayed attached even after 60 mph.
|
Technically, it's not a box cavity until it has a 'bottom.'
That open underside is polluting the pressure recovery of the top and sides, compromising performance.
If you had access to General Motors' contracted B-Roll video of their land speed record Impact/EV1 land speed record 'Yellow Ferret' box-cavity, you'd have a perfect example of what to build.
Cd 0.137, and 183-mph, in 1993!