Jabiru J450, Руководство конструктора

Страница: 292 / 343

Jabiru J450 Constructors Manual
Post-Paint>Wings>Connect wing tanks
Tuesday, April 6, 2010 292 of 343
Post-Paint>Wings>Connect wing tanks
Objectives of this task:
To connect the fuel lines and earth the wing tanks to the fuel system.
Route and connect the fuel lines
At this stage all of the fuel lines will have been routed through the front conduits during the
wing fitting task and will now be labelled and hanging down inside the cabin.
Start with the left-hand side fuel line bundle.
Take the time to arrange the bundle of fuel lines as they pass through the conduit so that the
breather line is on the top of the bundle as they enter the cabin. Cut a length of white aviation
wire long enough to run from the front of the wing, along with the fuel lines and terminate at
the earth point from the fuel pump, beside the header tank under the rear cabin step.
Cut a length of fuel line sheath to run between the front or entry conduit and the conduit in the
rear bulkhead. Make sure that the sheath is long enough that the fuel line bundle can be routed
just above the rear window and fit the fuel line bundle and the earth wire though the sheath
and then through the rear bulkhead conduit.
Lock wire the sheath in place over the front
and rear conduits as shown at right.
The fuel lines will be hanging down behind
the rear bulkhead and the lines must now be
accurately sized so that they run
smoothly to
the ferrules on the top of the header tank.
Take care that the lines will run to the header
tank with no low points that could cause a
vapour lock – this is
very important and you
must size the lines to that they run always
down to the header tank, not down and back
up to the header tank !
Use zip ties through holes in the rear
bulkhead lip to keep the fuel line routing
smooth and correct as shown at right.
Cut the lines to length and then loosen the
retaining strap that holds the header tank
down, rotate the header tank onto its right
side, slip a hose clamp over each fuel line
and fit them to the brass ferrules on the
header tank with the breather line going to
the top ferrule.
Tighten each hose clamp firmly.
Reposition the header tank in its brackets and tighten the retaining strap firmly and then repeat
the fuel line sizing and fitting process for the right-hand fuel lines. The right-hand fuel lines
can be fitted with the header tank strapped in place.
Example of fuel line routing behind the rear bulkhead.