[Xist]

From http://ecomodder.com/forum/showthrea...tml#post364651

Originally Posted by Xist

For a given body moving through air, does the air itself care the size of the body?

Originally Posted by aerohead

As far as size,the air doesn't know the difference (My Fortran IV professor would kill me for saying that).The air velocity must match such that 'dynamic similarity',or,'verisimilitude' exists for the body as far as Reynolds number is concerned.
If you found a boat hull which at the height of the Prius,happened to match the contour of the 'Template' you could use it for an 'ideal' body.And narrowing would be a must.
I've tried this with the full-boat-tailed trailer project.You'd want to find a better 'candidate' boat than the one I used.
The only parameter that's critical is the overall height above the ground where the body will be the tallest.Everything is scaled from there.
So with the go-kart,you'd probably use the top of the rollbar as your 'peak' and go from there.But bear in mind that you've got to have 'clean' air coming at the tail,so the kart would have to be completely enclosed for it to function.
I have a 21-foot sailboat hull which will become a 5th-wheel RV trailer.
If I live long enough to do it.