updates

docs/documentation/sizing/propulsion_design/overview.md

@@ -29,5 +29,5 @@ An example is shown in the following figure.
 
 ![](figures/deck_example.PNG)
 
-The data is readout by the engine library which has an efficient parser for the deck values using a linear interpolation between two existing deck values. Penalties, like shaft power offtake or bleed air offtake, are also calculated using the engine library. The description of the engine library can be found here as well.
+The data is readout by the engine library which has an efficient parser for the deck values using a linear interpolation between two existing deck values. Penalties, like shaft power offtake or bleed air offtake, are also calculated using the engine library. The scale factor is applied according to the exact scaling mechanism for the value needed.
 The description of the engine library can be found [here](../../../libraries/engine/).
\ No newline at end of file