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Old 10-07-2015, 06:16 PM   #130 (permalink)
aerohead
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0.13 / 0.09

Quote:
Originally Posted by freebeard View Post
Google says 6095 mm is 6.665573 yards. It would have a 10:1 fineness ratio.

The graphic I reposted at Permalink #120 shows a hard-edged half-body at 0.13 and a radiused lower edge half-body at 0.09 Cd. Comments?
*Paul Jaray's pumpkin seed as a full,streamline body of revolution,in free air,is Cd 0.045.
*As a 'half-body' in ground proximity (25 cm ground clearance) the body has twice the drag,at Cd 0.09.
*With wheels added,the rounded nose,but sharp lower rear edges,the car is Cd 0.13.

*With rounded lower rear edges,Cd 0.15.
*These values were verified by Kamm and Koenig-Fachsenfeld at the FKFS.
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Last edited by aerohead; 10-07-2015 at 06:18 PM.. Reason: add image
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