5 Checking stall speed

We will now check if all proposed wing areas fulfill the stall speed requirements.

1. Click the project button in the navigation bar.
2. Click one of the analysis in the tree view on the left.
3. Click the 'analysis results' tab.
4. Scroll down to the 'additional results' panel and click the edit button.

A popup window will appear in which you can set the following parameters:

• The max take off mass estimated at 730 kg according to the specifications.
• A sea-level altitude.

This will update the 'Additional results' panel with a table, which contain an estimation of True air speed for CLmax(stall) angle.

You should get the following results:

• For the analysis with a wing area of 12 m² : a stall speed of 48.87 knots.
• For the analysis with a wing area of 10 m² : a stall speed of 53.54 knots.
• For the analysis with a wing area of 8 m² : a stall speed of 59.86 knots.

The maximum stall speed without flaps required by the specification being 55 knots, the 8 m² design is rejected.