get inertial terms

3 files changed, 15 insertions, 4 deletions

diff --git a/creator.py b/creator.py
index 42f05e3..366909b 100644
--- a/creator.py
+++ b/creator.py
@@ -250,13 +250,12 @@ class Airfoil(Coordinates):
             y = (self.spar.z_u[_], self.spar.z_l[_])
             plt.plot(x, y, '.-', color='b')
 
-        # Plot stringers
-        # Upper stringers
+        # Plot upper stringers
         for _ in range(0, len(self.stringer.x_u)):
             x = self.stringer.x_u[_]
             y = self.stringer.z_u[_]
             plt.plot(x, y, '.', color='y', markersize=12)
-        # Lower stringers
+        # Plot lower stringers
         for _ in range(0, len(self.stringer.x_l)):
             x = self.stringer.x_l[_]
             y = self.stringer.z_l[_]
diff --git a/evaluator.py b/evaluator.py
index 56ce7a0..f6d0afc 100644
--- a/evaluator.py
+++ b/evaluator.py
@@ -142,6 +142,15 @@ class Airfoil:
             (len(x_stringers) * area)
         return(x_centroid, z_centroid)
 
+    def get_I_x():
+        pass
+
+    def get_I_z():
+        pass
+
+    def get_I_xz():
+        pass
+
     def analysis(self):
         '''Perform all analysis calculations and store in class instance.'''
 
@@ -153,6 +162,9 @@ class Airfoil:
 
         self.mass_dist = self.get_mass_distribution(self.mass_total)
         self.centroid = self.get_centroid()
+        self.I_x = self.get_I_x()
+        self.I_z = self.get_I_z()
+        self.I_xz = self.get_I_xz()
         return None
 
     def plot(self):
diff --git a/main.py b/main.py
index f5f4496..e771092 100644
--- a/main.py
+++ b/main.py
@@ -32,7 +32,7 @@ SPAR_MASS = 10  # lbs
 STRINGER_MASS = 5  # lbs
 
 # Area
-STRINGER_AREA = 1  # sqin
+STRINGER_AREA = 0.1  # sqin
 TOP_STRINGERS = 4
 BOTTOM_STRINGERS = 6
 NOSE_TOP_STRINGERS = 4