Quote:
Originally Posted by shuhao
Here's some preliminary simulation results
I'm using the drag coefficient of 0.15 as stated by Spen.M.P.
Using the magnus equation from http://en.wikipedia.org/wiki/Magnus_...all_in_the_air with a lift coefficient of 0.2 (some one could test?)
Though I'm kinda sceptical of the Wikipedia formula....... it seems like the formula is just the drag formula with a lift coefficient....
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Drag and Lift (and a couple other aerodynamic things) do use the same ideal formula, it's dynamic pressure and the coefficient. Some have extra terms of velocity (such as pitching moment and fundamental stability derivatives) and such, but all involve the same basic terms.
Also, if you're counting on the "lift" from that .20 coefficient, make sure you are including your second term in solving for your drag coefficient. Creating lift takes energy, that energy loss manifests in the same way that drag does. So it's just rolled right on into it.
http://www.grc.nasa.gov/WWW/k-12/airplane/dragco.html