https://www.wired.com/2011/05/x-priz...ts-207-5-mpge/
Quote:
Originally Posted by Cd
As far as a rough proof of concept, I'd call it a possible success.
But as far as actually road testing it, well that flopped.
I hope it gives others here on the forum some options on how to create a boattail without it being too long to not be cumbersome.
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The fundamentals you've incorporated have been tested and repeated time and time again.
Since no magic is involved, if one has success, and you mimic their architecture, physics demands that your performance would perform likewise.
The WW-II OPEL Blitz truck was manufactured by both GM's Adam Opel AG and Mercedes-Benz. If you stuck either one in the FKFS wind tunnel, you'd have the Cd for 'both.'
If Illuminati Motor's 2012 X-Prize entry can come in at Cd 0.165, then you ought to be in Cd 0.15 territory. You might have to glaze the 'louvered' area, but otherwise, I see no reason why 0.15 wouldn't be on the table.
Elliott G. Reid's isolated plan-taper research at Stanford University suggests that you could be below Cd 0.14. So I'm being conservative.
Your 'fundamentals' are spot-on.