diff --git a/docs/World/Aerodynamic/coefficients_data.md b/docs/World/Aerodynamic/coefficients_data.md
new file mode 100644
index 0000000..45cf2d3
--- /dev/null
+++ b/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
+```
\ No newline at end of file
diff --git a/mkdocs.yml b/mkdocs.yml
index 4992d03..c078e07 100644
--- a/mkdocs.yml
+++ b/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
         
diff --git a/tests/World/Aerodynamic/test_coefficients_data.py b/tests/World/Aerodynamic/test_coefficients_data.py
new file mode 100644
index 0000000..69afaca
--- /dev/null
+++ b/tests/World/Aerodynamic/test_coefficients_data.py
@@ -0,0 +1,63 @@
+import numpy.testing as npt
+
+from adr.World.Aerodynamic.coefficients_data import get_CL, get_CD, get_CM, get_CL_inv, get_CD_inv, get_CM_inv
+
+
+def test_get_CL():
+    npt.assert_almost_equal(get_CL(18), 0)
+    npt.assert_almost_equal(get_CL(12), 1.8)
+    npt.assert_almost_equal(get_CL(2), 0.8)
+    npt.assert_almost_equal(get_CL(0), 0.6)
+    npt.assert_almost_equal(get_CL(-2), 0.399, decimal=3)
+    npt.assert_almost_equal(get_CL(-12), 0)
+    npt.assert_almost_equal(get_CL(-18), 0)
+
+
+def test_get_CD():
+    npt.assert_almost_equal(get_CD(18), 2.1)
+    npt.assert_almost_equal(get_CD(12), 0.18)
+    npt.assert_almost_equal(get_CD(2), 0.08)
+    npt.assert_almost_equal(get_CD(0), 0.06, decimal=3)
+    npt.assert_almost_equal(get_CD(-2), 0.04, decimal=3)
+    npt.assert_almost_equal(get_CD(-12), 2.1)
+    npt.assert_almost_equal(get_CD(-18), 2.1)
+
+
+def test_get_CM():
+    npt.assert_almost_equal(get_CM(18), 0)
+    npt.assert_almost_equal(get_CM(12), -0.251, decimal=3)
+    npt.assert_almost_equal(get_CM(2), -0.260, decimal=3)
+    npt.assert_almost_equal(get_CM(0), -0.232, decimal=3)
+    npt.assert_almost_equal(get_CM(-2), -0.195, decimal=3)
+    npt.assert_almost_equal(get_CM(-12), 0)
+    npt.assert_almost_equal(get_CM(-18), 0)
+
+
+def test_get_CL_inv():
+    npt.assert_almost_equal(get_CL_inv(18), 0)
+    npt.assert_almost_equal(get_CL_inv(12), 0)
+    npt.assert_almost_equal(get_CL_inv(2), -0.399, decimal=3)
+    npt.assert_almost_equal(get_CL_inv(0), -0.6)
+    npt.assert_almost_equal(get_CL_inv(-2), -0.8)
+    npt.assert_almost_equal(get_CL_inv(-12), -1.8)
+    npt.assert_almost_equal(get_CL_inv(-18), 0)
+
+
+def test_get_CD_inv():
+    npt.assert_almost_equal(get_CD_inv(18), 2.1)
+    npt.assert_almost_equal(get_CD_inv(12), 2.1)
+    npt.assert_almost_equal(get_CD_inv(2), 0.04, decimal=3)
+    npt.assert_almost_equal(get_CD_inv(0), 0.06, decimal=3)
+    npt.assert_almost_equal(get_CD_inv(-2), 0.08)
+    npt.assert_almost_equal(get_CD_inv(-12), 0.18)
+    npt.assert_almost_equal(get_CD_inv(-18), 2.1)
+
+
+def test_get_CM_inv():
+    npt.assert_almost_equal(get_CM_inv(18), 0)
+    npt.assert_almost_equal(get_CM_inv(12), 0)
+    npt.assert_almost_equal(get_CM_inv(2), 0.195, decimal=3)
+    npt.assert_almost_equal(get_CM_inv(0), 0.232, decimal=3)
+    npt.assert_almost_equal(get_CM_inv(-2), 0.260, decimal=3)
+    npt.assert_almost_equal(get_CM_inv(-12), 0.251, decimal=3)
+    npt.assert_almost_equal(get_CM_inv(-18), 0)