Hangar 9 Alpha 40 ARF Assembly Manual page 19


Step 3
Slide the spinner backplate onto the engine crankshaft so it
is tight against the flywheel.

Step 4
Slide the propeller onto the engine crankshaft. The blades
of the propeller will be positioned against the bosses for the
spinner screws of the spinner backplate as shown below.
Hangar 9 Alpha 40 ARF Assembly Manual

Step 5
Thread the propeller nut onto the engine crankshaft.

Step 6
Use a 3/32-inch or 2.5mm hex wrench or ball driver to
tighten the adapter nut to secure the propeller and spinner
backplate onto the propeller adapter.
Note: Make sure the propeller has not moved from
its position as described back in Step 4. If it has, the
spinner cone will not be able to be installed in the
following steps.

Step 7
Slide the spinner cone over the propeller. It will fit into the
grooves in the spinner backplate when installed.

Step 8
Use the two 3mm x 10mm sheet metal screws supplied
with the spinner to secure the spinner cone to the spinner
backplate. A #1 Phillips screwdriver will be required to
tighten the screws.
19