RANS S-20 RAVEN
TEXT MANUAL
09/01/2013
03K-01
ROTAX 912ULS - 12" SPINNER ASSEMBLY
(FINAL INSTALL OF ENGINE)
•
Spinner Assembly requires Propeller and Prop Extension
1.
Refer to the parts catalog and select the required components for
assembly.
2.
The AFT edge of the Spinner Dome and Backing Plate supplied have
been trimmed at the factory and should not require any additional
trimming.
3.
Check that the Prop Extension fits in the pre-drilled holes of the Spinner
Backing Plate. The fit should be tight. If some sanding is required, use
sandpaper wrapped around a dowel or tube.
4.
Cut out the Spinner Dome to match the Prop type. See
FIGURES 03K-04
and
03K-04A
.
HINT: Use a compass and draw a circle slightly larger than
the spinner diameter. Use a ruler and draw lines from center to outer edge
of circle. For a 3-Blade prop use a protractor and make the marks exactly
120° apart.
Center the Spinner Dome in the circle and mark the Dome at
lines.
5.
Glue the Prop template to poster board and cut out. Align one edge of the
template on a mark and tape to the Dome. Draw the opening on the
Dome. Repeat for the remaining openings using the same edge of the
template for each. The openings may be cut and sanded smooth using a
Dremel.
HINT: Use reinforced cut-off wheels and 1/2” sanding drums.
CAUTION: Always use proper safety equipment.
Cut the opening slightly
small and sand to exact fit.
6.
Fit the Spinner Backing Plate onto the Prop Extension. Press the Prop hub
onto the Extension. Test fit the Dome. Sand the openings to an exact fit.
Allow at least 1/8” clearance between the Spinner and Prop.
NOTE:
Blades may need to be temporarily clamped in place on adjustable props.
Be sure the Dome is flush with the backside of the Backing Plate.
HINT:
Use 3 or 4 thin boards under the Backing Plate for support.
7.
Remove Dome and mark hole locations on the Dome’s perimeter for 4
screws, evenly spaced, between each cut-out. Refer to
FIGURE 03K-07
.
Drill #40 through the marked locations.
