Quantcast

OpenRocket Angle of Attack and Drag Scaling

The Rocketry Forum

Help Support The Rocketry Forum:

cajer

Member
Joined
Oct 19, 2011
Messages
6
Reaction score
0
I see in the open rocket technical guide they reference an fitting function for angle of attack vs drag scaling obtained from wind tunnel results for rocket shaped objects.

"Based on experimental data an empirical formula was produced for
calculating the axial drag coefficient at an angle of attach $\alpha$
from the zero-angle drag coefficient. The scaling function is a
two-part polynomial function that starts from 1 at $\alpha=0^\circ$,
increases to 1.3 at $\alpha=17^\circ$ and then decreases to zero at
$\alpha=90^\circ$; the derivative is also zero at these points."

I can't seem to find the function or the paper it's referencing. Does anyone have any ideas?
 

markkoelsch

Well-Known Member
Joined
Mar 18, 2009
Messages
4,364
Reaction score
148
I would start with the master thesis written by the creator of Open Rocket
 

cajer

Member
Joined
Oct 19, 2011
Messages
6
Reaction score
0
That quote was pulled directly from the master's thesis. There is not reference in there.
 
Top