Add docs for coefficients_data

Also add entry on docs structure

Author: rafaellehmkuhl

docs/World/Aerodynamic/coefficients_data.md

@@ -0,0 +1,49 @@
+# coefficients_data
+
+This file contains several functions for calculating the lift, drag and moment coefficients for a fictional airfoil based on the Selig1223. It also contains the same functions for calculating the coefficient of the inverted version of the airfoil (usually used on horizontal stabilizers).
+
+This fictional airfoil stalls for 15 degrees and -5 degrees of AoA.
+
+One just need to call the corresponding function with the desired angle-of-attack as argument:
+```python
+from adr.World.Aerodynamic.coefficients_data import get_CL, get_CD, get_CM, get_CL_inv, get_CD_inv, get_CM_inv
+
+print(get_CL(18))
+>>> 0
+print(get_CL(12))
+>>> 1.8
+print(get_CL(-2))
+>>> 0.399
+print(get_CL(-12))
+>>> 0
+
+
+print(get_CD(18))
+>>> 2.1
+print(get_CD(12))
+>>> 0.18
+
+
+print(get_CM(18))
+>>> 0
+print(get_CM(12))
+>>> -0.251
+
+
+print(get_CL_inv(18))
+>>> 0
+print(get_CL_inv(-12))
+>>> -1.8
+
+
+print(get_CD_inv(12))
+>>> 2.1
+print(get_CD_inv(-18))
+>>> 2.1
+
+
+print(get_CM_inv(18))
+>>> 0
+print(get_CM_inv(-12))
+>>> 0.251
+```

mkdocs.yml

@@ -10,6 +10,8 @@ nav:
         World:
             Ambient: World/Ambient.md
             constants: World/constants.md
+            Aerodynamic:
+                coefficients_data: World/Aerodynamic/coefficients_data.md
         helper funtions:
             algebric: helper functions/algebric.md