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Co-authored-by: Ellen Seabrooke <ellen.seabrooke@ifb.uni-stuttgart.de>

docs/documentation/sizing/initial_sizing/initialSizing.md

@@ -45,7 +45,7 @@ For the determination the following parameters are necessary:
 1) acXML:
 
   - Design range  [m]
-  - Crusie flight speed $[\frac{m}{s}]$: automatically calculated from the design machNumber
+  - Crusie flight speed $[\frac{m}{s}]$: automatically calculated from the design mach number
   - Contingency  [-]: percentage for the reserve of the trip fuel (the fuel necessary for the design range without reserves)
   - Cruise flight altitutde  [m]: to calculate the air density