Quote:
Originally Posted by LostCause
The low cD is probably due to windtunnel data. Surprisingly minor changes to a non-aerodynamic shape can create significant differences in drag. These minor changes are pretty much impossible to find outside of the wind tunnel.
Food for thought: the lowest cD of a wheeled vehicle in ground effect - ~0.15
- LostCause
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I'd like to add that .15 is assuming a completely smooth body.