RANS S-20 RAVEN
TEXT MANUAL
09/01/2013
03M-01
ROTAX 912ULS - PROPELLER INSTALLATION
(FINAL INSTALL OF ENGINE)
•
The Engine, Prop Extension, and Spinner Backing Plate must be
installed before installing the Propeller.
1.
Refer to the parts pages and select the required components for
assembly.
2.
Install the Flange Bushings into the prop flange on the engine from the aft
side. A “C” clamp may be required to completely seat the Bushings into
the flange. Place a small wood block between the pad of the clamp and
the Flange Bushing to protect them from being damaged. Use a piece of
tubing approximately 1" long over the Flange Bushings to allow them to
seat as the “C” clamp is tightened. See
FIGURE 03M-02
.
3.
Inspect the Prop for any nicks, crack or dings.
4.
Assemble and mount the propeller as per parts drawing and
Manufacturer's instructions using the bolts provided. Set pitch of prop,
using measuring tools provided with the prop to the following for a starting
point. Adjustment may be required after Static RPM is checked.
•
Whirl Wind = 20.5º per manufacturer's instructions
•
Warp Drive = 14º at tip
5.
Note the length of the bolts is critical. Use washers to be certain the bolts
are not bottomed out on the threads.
DANGER: If bolts are bottomed out
on the threads, the prop is not properly torque, separation from the aircraft
during operation may occur.
Use a star pattern and torque the bolt per
Manufacturer's instructions. Re-torque bolts after 5 hours of flight and
thereafter according to Manufacturer's instructions.
6.
Check prop for tracking by turning blade into a vertical position and
placing an object at the tip. A plastic 5 gallon bucket or similar will work
well. Rotate the prop to the next blade and check position. If the position
is the same, the prop is in track. If not, loosen prop bolts and re-torque
until proper tracking is achieved.
HINT: Start torque pattern on the blade
that is out of track.
See
FIGURE 03M-06
.
DANGER: Track prop with
ignition OFF!!
