Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Firewall forward>Fit ram air cooling ducts
Tuesday, April 6, 2010
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Fit the magneto coil cooling tubes
Starting with the left-hand duct, drill a ½” hole at the top centre rear of the duct and slip the
90° curved aluminium tube into place. Aim the lower end of the tube at the centre of the left-
hand magneto coil, mark the tube at an angle parallel to the side of the coil, remove the tube
and cut along the mark. Shorten the top end of the tube as required – it should fit about 1½” to
2” (40-50mm) inside the duct.
Refit the tube to the duct and hold it in position with masking tape. Mix a small batch of 5-
minute Araldite and flock and fix the tube to the duct. Leave to cure, then remove the duct
and apply flock around the tube on the inside of the duct to provide strength. Leave to cure.
The right-hand duct will require a ½” hole on the inside top curve as shown above left, then
follow the same procedure of holding the 45° tube in place with tape and flocking into place.
Leave to cure, then remove the duct and apply flock around the tube on the inside of the duct
to provide strength. Leave to cure.
Refit both ducts and leave them in place.
This completes the
Pre-Paint>Fuselage>Firewall forward>Fit ram air cooling ducts
task.
Left-hand magneto
coil – cut the tube
parallel to the side of
the coil