Jabiru J450, Руководство конструктора, Страница: 43 / 343

Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Undercarriage>Fit main gear
Tuesday, April 6, 2010 43 of 343
Fit the reinforcing plates
Cut 2 x short lengths (~7mm) of reinforced hose (cut square) and slip one over each centre
bolt, then fit the curved reinforcing plates, roughened side down with the curved side facing
outwards, followed by a flat washer and a Nyloc nut.
Cut 4 x 12mm lengths of reinforced hose and slip one over each clamp bolt, then fit each
square reinforcing plate, roughened side down, followed by a flat washer and a Nyloc nut.
Tighten each nut until the first thread on the bolt is just visible above the top of the nut – at
this point one side of the reinforcing plate will be very close to the cabin floor and the
reinforced hose will be compressed to roughly half of its original thickness and will have
formed to suit the shape of the floor so it will completely seal the bolt from any flock.
Tap each plate around until it is squarely
aligned in relation to the console or the sides of
the fuselage as appropriate.
The clamp bolt reinforcing plates have the
holes drilled off-centre: the widest part of the
plate should be closest to the higher part of the
floor.
Brush some resin on the floor under each
reinforcing plate and then pack flock in and
around each plate until all voids are filled.
Use a clean mixing stick dipped in resin to smooth any excess flock from around the plates
and also from around the clamp plates under the gear leg.
Leave overnight to cure.
Next day the clamp bolts can be tightened until 2½ threads protrude beyond the nut, which in
turn will provide the required tension.
Tighten the centre bolts until the rubber bush between the gear leg and the aluminium washer
has been compressed to half its original height.
The main gear is now permanently fitted to the fuselage and the saw stool or trestle can be
removed from beneath the cabin, however the trestle that is supporting the tail of the aircraft
will need to remain in place until the nose wheel and engine have been fitted.
This completes the Pre-Paint>Fuselage>Undercarriage>Fit main gear task.
Clamp bolts
Before --- Centre bolts --- After
Reinforced hose
Reinforcing plate
Floor Floor