Quote:
Originally Posted by arcosine
No, I am modding the sc1, Aerohead, you are theorizing about it. I still want to put some kind of tail on it, improve the flow through the engine radiator and move the front bottom lip up to round off the air dam. Remove the trailer hitch. What tail would theoretically better, maintaining the rear glass slope through the trunk, and having tail fins for the lights and fenders or starting the tail at the trunk edge? the rear glass slope is 17 degrees. Of course cutting the square fenders an bumper off and tapering the whole rear end would be best, but I am not ready to do this.
I am thinking of some engine mods, cam timing, which I will elaborate on in a different post.
http://ecomodder.com/forum/showthrea...ing-22959.html |
Tony,I'd like you to do a search for:
*photo albums
*then click on Phil Knox aerodynamic photos album
*go down to 'other vehicles 1',p.1,line-2,1st image(this is a rear view of the boat tail on my CRX.
--------------------------------------------------------------------------
*then go to 'other vehicles 2',p.1,line-3,3rd image.(this is a side elevation of the boat tail).
--------------------------------------------------------------------------
If you were to project out from the Saturn's roof along the 'Template',extending the C-pillars into aerodynamic buttresses,while extending the trunklid elevation back,and curving the sides in gently,you'd 'box in' an attached vortex which would occupy this void.
The active flow would bounce off this vortex and would be forced to follow a path as if you had a perfect K-form roofline.
--------------------------------------------------------------------------
My CRX as shown,has Cd 0.235,is 7 mph faster,and gets low 60s mpg on a calm day at the old double-nickel speed limit.It drops to 52 mpg at 70 mph.This is with only 12-inches of boat tail.
-------------------------------------------------------------------------
Your Saturn is 'cleaner' than my CRX ever hoped to be,so she's gonna do even better.It's just a matter of length.I'd stick to the 'Template.' The curvature you use in elevation you can match in plan view.You'll just have to locate the point on the body sides where she's at her max. width.You'll have to do the best with what you have based upon what Saturn got started.
If you can live with a little length there's no reason why you can't go below Cd 0.20.
--------------------------------------------------------------------------
NOTE: The buttresses will create a blind spot as with Insight and Prius and you'll just have to pay more attention to your mirrors.A price we pay for working with production cars.