Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Pre-fit wheel spats
Tuesday, April 6, 2010
154 of 343
Pre-Paint>Fuselage>Pre-fit wheel spats
Objectives of this task:
To pre-fit the spats to the main wheels and the nose wheel. This is a task that will require
several trial fits, and it should be done in the stages described below.
Main wheel spats
The main wheel spats are held in place by a single bolt on the outside that fits into the axle
extension and 4 screws on the inside that fit to the spat mounting plate. The inside holes
(arrowed at centre right) should all be countersunk to accommodate Tinneman washers.
Prepare the spats by trimming out the bottom of the wheel opening as shown above – once the
bottom opening is correct the spat can be test fitted and the gear leg opening shaped to suit.
Mark back 55mm from the axle bolt hole and drill a 1 1/8” hole for access to the valve as
shown above left. Slip the spat down over the wheel until the outside axle bolt hole lines up
with the axle extension: you will probably have to trim the main gear leg opening slightly to
get the spat fully down over the wheel. A typical inside cut is shown marked above right, but
check your own spat to main gear leg fitting then mark and trim accordingly.
Fit the spat into position with the axle bolt and the
inside screws and make sure that there is a gap
between the main gear leg and the top of the spat
that will allow the hydraulic brake line to pass
through without any risk of chafing on the spat.
Loosen the 2 top bolts that hold the spat mounting
plate – one hole is slotted to allow adjustment – and
rotate the spat until the top rear is 9” (230mm)
above the ground, then tighten the bolts.
55mm
9”
(230mm)