2. Now go to Insert next to Reference Geometry next to Plane. Select the front plane from the model view, and set the distance between this plane and the new plane to be the desire of 1.34 meters, 2.68 meters, 4.09 meters, 4.80 meters and this 5.5 meters are span of the wing. Each planes select the green check mark to insert the plane. The reference geometry plane should appear in the model view and the design tree.