Sequoia Aircraft Corporation F.8L Falco, Construction Manual

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F.8L Falco Construction Manual 22–8 Revision 4, March 1, 2002
The notched strip of wood will correctly position the trailing edge rib at the 95% chord
station, but at the aft face of the spar you should refer to the rib drawings to note the
correct position. This is not as simple as it sounds since the spar will end up with some
curve sanded into it. At each end, the ribs will appear to be installed too low when they
are installed correctly. The rib drawings show the aileron/flap spar in its rectangular as-
built-in-the-jig shape, and you must measure from this rectangular shape to correctly
position the trailing edge ribs on the aft face of the spar.
Figure 8
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Temporarily clamp the trailing edge strip in place. Fit and install the diagonal flap and
aileron ribs. See Figure 8. The channel-nuts for the aileron and flap hinges should be
permanently installed. After the diagonal trailing edge ribs are installed, most of the
channel-nuts are difficult to remove and the channel-nut for the inboard flap hinge is
probably impossible to remove.
Figure 9
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Install the trailing edge strip. See Figure 9. Notch the trailing edge strip for the wing ribs
at Sta. 1, 2, and 14 as shown on Drawing No. 206.
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Fit the leading edge ribs and notch them for the leading edge strip. As with the trailing
edge ribs, refer to the rib drawings to locate the vertical positions of the ribs on the spar.
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Cut the leading edge ribs for the leading edge strip.
Figure 10
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Install the leading edge ribs. Use the angle guides to hold these ribs in place while gluing.
See Figure 10. Check to make sure the leading edge ribs at the hinge openings will clear
the hinge bases of the hinges installed on the aft wing spar—see Drawing No. 204.
Figure 11