13. Finally we need to mirror the right side of the fuselage to the left. Do this by first selecting the curve that we just drew with the selection tool. Now click on the mirror button (the one just above the check mark button). Finally, click on the center line that we drew earlier (the vertical line in the sketch). You should end up with the
following sketch:
14. Now click on the button with the check mark. If you select "Standard Orientation" under the "View" menu, you should now have something like this:
15. It may be a good idea to save your part at this point. We now have everything needed to create the variable section sweep body. Select "Insert >> Variable Section Sweep." Click "Sweep as solid" button on the bottom of the screen. 16. Click on the "References" button on the bottom of the screen. Click on the straight centerline axis that you drew earlier. You should have "Normal to Trajectory," "Automatic," and "Default" as the options shown on the drop down menus. 17. Next you will define the X-Trajectory. As mentioned earlier, you should use the curve that defines the lower surface of the fuselage as your X-Trajectory. So, click on "Details…" and the "Chain" window will appear. Click "Add" in the "Chain" window and click on the bottom of the fuselage. Click "Okay" in the "Chain" window. Click the X-box next to Chain1 in the "References" at the bottom of the screen. 18. Now we have to select the four curves that define the lower, right-hand, upper and left-hand side of the fuselage in that order. Click "Details…" again. Click "Add" and click on the bottom of the fuselage again. Click "Add" and click on the right side of the fuselage. 19. Continue this process until you selected all four fuselage curves. 20. Click on the "Create or edit sweep section" button on the bottom of the screen. You will now see the front view of your fuselage. You can simply use a spline that connects the four points that define the front of your fuselage (the points should be marked with "x" symbols). This is what my cross-section looked like after I drew the spline:

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