Sequoia Aircraft Corporation F.8L Falco, Construction Manual

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F.8L Falco Construction Manual 10–2 Revision 4, March 1, 2002
be made in the general direction of the grain slope. The object is to make the cut in such a way as
to minimize the amount of end grain showing on the face of the scarf joint. Figure 1 shows this
requirement, but please note that the grain direction is greatly exaggerated.
Thirdly, in laminated members the longitudinal distance between the nearest tips of the scarf in
adjacent laminations may not be less than 10 times the thickness of the thicker of the laminations
(See Figure 2). All of the laminations in the Falco are made of strips of wood of equal thickness,
so this means that if you are laminating a spar cap from 10mm boards (as with the main wing spar)
the tips of the scarf joints may not be closer than 100mm in adjacent layers.
10T
10T
10T
Figure 2
All of these requirements for scarf joints, laminations, and many other important aspects of wood
construction (grain deviation, moisture content, grading of wood, etc.) are covered in
AC 43.13-1
and ANC-19 .