design_method.md:

- Edited some equations

docs/documentation/sizing/fuselage_design/design_method.md

@@ -13,23 +13,25 @@
 The cabin width is estimated using the given class definition.
 
 #### Determine width of seat row per aircraft side
-The width of one seat row/bench $w_{seat\_bench}$ (in inch) can be determined for the left and right side of the aircraft using the following equation:
-$
-    w_{seat\_bench} = n_{seats} \cdot w_{seat} + 2 \cdot w_{armrest}
-$
+The width of one seat row/bench $w_{\text{bench}}$ (in inch) can be determined for the left and right side of the aircraft using the following equation:
+$$
+    w_{\text{bench}} = n_{\text{seats}} \cdot w_{\text{seat}} + 2 \cdot w_{\text{armrest}}
+$$
 
 In which
-- $n_{seats}$ - number of seats per seat bench
-- $w_{seat}$ - seat width (taken from lowest class seat)
-- $w_{armrest}$ - armrest width (taken from lowest class seat)
+
+- $n_{\text{seats}}$ - number of seats per seat bench
+- $w_{\text{seat}}$ - seat width (taken from lowest class seat)
+- $w_{\text{armrest}}$ - armrest width (taken from lowest class seat)
 
 #### Calculate cabin width
-The cabin width $w_{cabin}$ (in inch) can then be calculated:
-$
-    w_{cabin} = w_{aisle} + w_{seat\_bench\_left} + w_{seat\_bench\_right} + 2 \cdot w_{seat\_space}
-$
+The cabin width $w_{\text{cabin}}$ (in inch) can then be calculated:
+$$
+    w_{\text{cabin}} = w_{\text{aisle}} + w_{seat\_bench\_left} + w_{seat\_bench\_right} + 2 \cdot w_{seat\_space}
+$$
 
 In which
+
 - $w_{aisle}$ - passenger aisle width
 - $w_{seat\_space}$ - lowest class seat space