 # Profile Example

Upper surface - Station:

• First number, in the upper surface table, is 0, and marked as X = starting point. I am using centimeters (cm) in this example below, and I´ve made a line that is 100 cm long.
• Put a mark for the second number 4.31 millimeters (mm) from X on the line.
• Third number is 0.673. Put a mark 6.73 mm from X on the line. Do the same with the rest of the numbers in the station table. Upper surface - Ordinate:

• Now, to plot the upper surface put a mark, using the second number in the ordinate table, 0.867 above the corresponding number in the station table 0.431. That is 8.67 mm up.
• Third number in the ordinate table is 1.056. Put a mark 10.56 mm above the corresponding number in the station table (0.673).

When you have finished plotted the station and ordinate points, draw a line between X and through all the ordinate marks and voile! the upper surface is ready. Lower surface - Station:

• First number, in the lower surface table, is 0, and marked as X = starting point.
• Put a mark for the second number 5.69 mm (0.569) from X on the line.
• Third number is 0.827. Put a mark 8.27 mm from X on the line. Do the same with the rest of the numbers in the station table. Lower surface - Ordinate:

• Now, to plot the lower surface put a mark, using the second number in the ordinate table, -0.767 below the corresponding number in the station table 0.569. That is 7.67 mm down..
• Third number in the ordinate table is -0.916. Put a mark 9.16 mm blow the corresponding number in the station table (0.827).
• When you have finished plotted the station and ordinate points, draw a line between X and through all the ordinate marks and voile! the lower surface is ready. Now you know how to make a wing profile!

Offered by Geson. 