More importantly, why would anyone realistically want to have wrong answers?
Aerodynamics doesn't really 'do' approximate. Tiny variations in the flow field can dramatically alter results, so something that's being done 'as a rough estimate' is usually just wrong rather than an approximation.
and after for replies.
Didn't even read the thread at all did you.. not talking pages and pages, just 4 posts above...
Thanks for your answers