Wings
The wings are almost completely finished at the factory. The control surfaces are hinged and
trimmed, and the phenolic control surface horns are installed already. The wings are mounted
using the anodised aluminium alloy 6061-T6 spar tube (40mm Ø x 990mm long), and a pair of
10mm diameter carbon anti-rotation pins in each wing, which have been installed for you and
the wing incidences checked. They are held onto the fuselage with M6 bolts and washers, that
pass thru’ the plywood root rib and into M6 T-nuts that you need to install in the fuselage.
Wing Bolts
Drill a 6mm hole thru’ each plywood wing root rib, exactly
13mm (1/2”) behind the back edge of the fibreglass wing
tube, about 3 - 5mm
below
a centerline taken between the
2 carbon wing dowels. Fit the wing tube into the fuselage
and slide the wings on. The wing roots have been trimmed
to match the fuselage already, but you can do a little fine
sanding here if needed. Working thru’ the landing gear
opening with the plane upside-down, mark the centre of
the 6mm hole on the outside of the fuselage, remove the
wings and drill the holes in the fuselage 7.5mm diameter.
Refit the wings and wing bolts, with washers, thru’ the
holes in the root rib, and screw on the M6 T-nuts
gently
-
just enough to hold the T-nuts in the correct position. You
will need a 5mm ball-ended hex-wrench to tighten the wing
bolts, because of the angle. See photo P31 for a view of
the bolt inside the wing, just in front of the gear door cylin-
der. The T-nut is quite close to the bulkhead in the fuse-
lage, and you may need to grind off the front edge of the
nut for clearance.
Remove the wings. Then use the M6 wing bolts with a
large washer under the head and a scrap plywood plate
with a 6mm hole in it to pull the T-nuts tightly into the ply-
wood plate inside the fuselage. Refit the wings and wing
bolts to check alignment of the T-nut, and then secure
them with a little 30 minute epoxy. There is enough space
between the wing root rib and fuselage to put an ‘O’ ring,
or a short length of silicone tube, on the M6 bolt to prevent
it falling out and getting ‘lost‘ when the wings are removed
for transport or storage (photo P21).
It is not necessary for the wing bolts to be overtightened
when assembling the plane, and this could damage the
joint between the root rib and the wing spar box. We
advise you to laminate a small piece (60mm x 60mm) of
heavyweight (160 - 200 gram) fibreglass cloth in the corner
between the ply root rib and back face of the balsa spar
box to reinforce this joint, but this will be done in the facto-
ry for the next production run. (see photo right)
17
(above) Reinforce the joint
between the back of the balsa
spar box and root rib with fibre-
glass if not done at factory. Note
the shape of the cutout in the
wing skin for the inner gear door.
(above) 7.5mm Ø hole in fuselage
for wing bolt T-nut, 13mm behind
wing tube.
(below) Scrap ply and large wash-
er under the bolt to pull T-nut
into plywood inside the fuselage.
Содержание Ultra Lightning
Страница 1: ...C A R FMo d e l s U l t r aL i g h t n i n g I n s t r u c t i o nMa n u a l...
Страница 36: ...35 above Fuselage hardware bag above Wing hardware bag above Kit Contents...
Страница 37: ...36 above Stabiliser hardware bag above Wood and Phenolic parts bag above Vertical Fin hardware bag...
