We will now check if the 12 m² and 10 m² wing area designs fulfill the cruise speed requirement. As explained in the preceding chapter, in each analysis results tabs, we must edit the parameters of the 'Additional results' panel. This time we add a power model, as shown in the following image.
Note: the rated speed is 3300 RPM, but the default long-use speed is 2800 RPM, so we use this parameter to model a flight at cruise speed.
At the bottom of the 'Analysis results' tab can be seen the 'Maximum velocity' result, or in our case, the cruise speed obtained at 2800 RPM.
You should get the following results:
- For the analysis with a wing area of 12 m² : a cruise speed of 133.3 knots.
- For the analysis with a wing area of 10 m² : a cruise speed of 142.61 knots.
The minimum cruise speed required by the specification being 140 knots, the 12 m² design is rejected.
