Chapter 5 - Fuselage
5.13 - Wing Attachment Reinforcers
Page 78
Another important alignment is the positioning of the wing in relation to the
fuselage. Take a reference to the centerline of the aircraft near the vertical stabilizer spar.
Measure the distance between this point and two respective points on each wing so that
this distance becomes the same.
Once the alignment is complete, check again that the wing is at 3 degrees of
incidence, that the two wing tips are on the same level and that the wing is correctly
positioned (evenly between the right and left sides). Now check that the rear spar has
remained above the lower edge of the fuselage. With the help of a ruler, draw a line on
the fuselage aligned with the rear face of the rear spar. This line must comprise the leveled
projection of the height of the spar where the rear face of the spar meets the cladding (see
diagram below).
From the line drawn on both sides of the fuselage, draw a straight line perpendicular
to them with a length of ½'' towards the rear of the fuselage at each vertex.
Join the new vertices by drawing a line parallel to the original and thus forming the cut
rectangle for the secondary spar.