The fact that you used "two lousy hundredths" as the title cracked me up
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Originally Posted by aerohead
*AEROCIVIC might get in trouble in many states due to the mirror delete.If so,with the restoration of the driver's mirror,the Cd might be 0.177.(fabulous still!).
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ECOSCORT might get in trouble as well, since I have no side mirrors
I am legal as far as the state of NC is concerned. And wow, I did not realize how much side mirrors affected the Cd!
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*To get to Cd 0.15,or below,Hucho is going to tell you to do more elongation and perhaps do an active diffuser which can be lowered on the highway.
*An inflated tail would be one approach,as it's only deployed for the highway.
Here's a pictorial thought experiment with one
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I recall that if the template was followed exactly on my car, the total length would reach between 20-21 feet! That is longer than an extended cab long bed Chevrolet Silverado, but it is still shorter than this -
How is that for elongation??
An active diffuser, hmm... what is wrong with a set height diffuser that is low enough for good aero,flexible enough to withstand city driving and rigid enough to survive 60 mph?
The inflatable boattail is a wonderful thought! I am unsure how to implement it in the real world. I'll think on it and weigh between it and the rigid tail.
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*If you'll do everything to the Escort as AEROCIVIC,and then push a little harder,then you've got a shot at it.
*'Fix' your suspension at some attitude,then design the bodywork close to the template at that inclination.Mockups of body parts can be tuft-tested as you go to check for separation.When they show 'clean' flow,you can commit to that part knowing it will perform.
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That is what I love to hear
I am planning on a 2" suspension drop front and rear, keeping the car as level as possible. I MAY try to drop it a little less in the rear so my belly pan acts as a diffuser. It will work out the geometry when that time is closer.
I actually have access to a smoke machine at my church
so I am tempted to borrow it and do a mock-up wind tunnel test! This will have to be on a super calm day, or even indoors. First thing I will have to do is see if the fog can even get thick enough to see and if I can get a fan to generate 50+ mph winds. I could make scale models and test them out easier.
Right know, I am trying to figure out how to attach tire boat tails to my car along with outer and inner side skirts, and it is more difficult than it first appeared. Then I want to redesign the rear fender skirts along with designing the front fender skirts!
...Gotta take it one day at a time...
