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Old 08-30-2013, 03:12 PM   #48 (permalink)
aerohead
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Cd 0.15

I think it would be quite remarkable if you didn't realize 0.15.
She's a more proper half-body than the Cd 0.14 B'o'chum University solar car and has the effective fineness ratio more like Cambridge University's Eco Racer CUER,which Tokai University is reporting at Cd 0.11.
Hucho reproduced Buchheim et al's Volkswagen research of 1981 publication which represented a bevy of Cd 0.15-0.16 shapes measured in the climatic tunnel.If you throw in Buchheim's 'Flow-body' long-tail version reported in Hucho's 1978 SAE paper,they got Cd 0.14.
And Hucho says that with further integration of the wheels into the body,that Cds on the order of 0.09 to 0.07 can be approached (as with NUNA-3).
If I were a gambling man,I'd say 0.15 is in the bag.
If every member here at the Aero Forum put a few bucks in a magic hat,we could underwrite a trip to the the A-2 Tunnel for a measurement.
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