Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Undercarriage>Fit main gear
Tuesday, April 6, 2010
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Pre-Paint>Fuselage>Undercarriage>Fit main gear
Objectives of this task:
In this task you will permanently fit the main undercarriage to the fuselage. Both main gear
legs will be fitted to the fuselage at the same time and the mounting bolt reinforcing plates
will be flocked to the cabin floor as part of the fitting process.
At this point in the build the fuselage should be upright and firmly mounted on 2 trestles that
place the underside of the fuselage at 650mm high under the cabin. If the fuselage is any
lower you will need to pack it up to 650mm high under the cabin in order to fit the main gear.
A standard 650mm high builders sawhorse placed in front of the main gear recess under the
cabin would provide adequate clearance.
Materials required:
Card # J7 „
Undercarriage
‟
Epoxy resin and flock
10mm / 3/8” ID reinforced hose approximately 80mm long:
Prepare and pre-fit the main gear legs
Fit the centre bolt to the inboard end of each leg: the AN6-24A bolt (the shortest 3/8” bolt on
the Card) goes through a flat washer, a machined aluminium washer and 2 rubber bushes,
with the rubber bushes fitting into the gear leg as shown above left and centre.
Fit the gear leg into the recess in the fuselage and fit the bolt up through the inner hole in the
gear leg recess as shown above right. Place a Nyloc nut loosely on the thread for the moment.
Cut out the yellow packers for the clamp plate and drill 3/8” holes in each end as marked.
Assemble the clamp plates: fit 2 x AN6-26A bolts and washers to the clamp plate then fit the
yellow clamp plate packer to one bolt only. Fit the assembly around the gear leg then fit the
yellow clamp plate packer to the other bolt and test fit by fitting the bolts up through the holes
in the fuselage.
Clamp plate
Packer
Plates
Gear leg
Gear leg
Fuselage