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With the fan still in place, carefully slide
the 2 mounting brackets under each of the
fans mounts. Due to production differences
the intake duct might be slightly off center.
Hence it can happen that the brackets are
slightly too broad. Carefully trim them to
shape until you get a close but not tight fit
between fuselage and fan. Slightly sand the
fuselage at the places where the mounts
will be glued later.
Next, tack the bracket in place with a drop
of CA glue. Once both brackets are
secured, remove the fan unit.
Permanently glue the mounts in place with
30 minute epoxy and milled fiberglass.
Once cured, install the fan and mark the
screw location on the brackets. Drill the
holes and secure the fan in place.
The exhaust duct is fabricated out of the
supplied clear PVC sheet. Place the sheet
on the template and trace the outline. Mark
the last line of the template on the PVC
sheet. This will be the glue line for later.
Cut the sheet and roll it together.
Depending on the fan you choose for your
Sniper adjust the exhaust nozzle diameter.
HET 9305 Fans should use an exhaust
diameter of 78mm. Midi Fan nozzles
should be smaller at 75mm. Glue the sheet
together with CA. Use your fan housing as
a guide on the intake side.
Once the duct is finished check the outlet
diameter of the fuselage. The slim end (75-
78mm diameter) of the duct should fit
inside the fuselage without folding. In case
the exhaust diameter of the fuselage is too
small, slightly enlarge it by cutting a few
mm off the end of the fuselage with a
cutting disk. Always only mark and cut a
few mm. Check and trim again if
necessary.
