Skyranger Nynja, Build Manual, Page: 25 / 278

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Nynja Build Manual 1.4d
2.3 Lower Cabin Triangle
2.3.1 Orienting the main undercarriage cross-beam tu9.
The main undercarriage cross-beam tu9 is made of steel.
Flip the beam over until satisfied that the holes are in the correct positions.
The holes in the steel main undercarriage cross-beam tu9 are drilled at
an angle through the beam so that the tail section of the fuselage,
which attaches to the third set of holes in from the ends, tilts upwards
from the beam whilst the lift-strut attachment bolts, nearest the ends,
remain horizontal.
Figure 16 Tu9 (The big white tube), looking from above, front of aircraft to left
2.3.2 Fitting the sides of the lower cabin triangle to the main
undercarriage cross-beam.
a) Assemble the aluminium linking plates 9 onto the pair of lower cabin triangle
tubes tu12 , including the seat support brackets (Figure17)
The linking plates are drilled with three 6mm holes, not at equal
intervals. The centre hole is offset away from the single mounting hole.
Remember the anti-crush spacers on the bolts (inside the tubes).
The middle bolts have the seat support bracket, an L-shaped piece, on
their upper ends, with the upstanding part of the bracket in front of the
bolt. A piece of fuel tube may be slit to fit over the support, and secured
with silicone sealant, to make a better rest for the seat base later.
The bolts should pass from bottom to top (contrary to the drawing, but
as per the photographs), to clear the undercarriage legs later.