27
Hangar 9 Sundowner 36 ARF
Engine Installation
Required Parts
Fuselage assembly
Engine mount (right and left)
3mm blind nut (4)
3mm locknut (4)
3mm lock washer (4)
3mm washer (12)
Engine
Plywood engine mount template
3mm x 20mm socket head screw (4)
3mm x 25mm socket head screw (4)
Required Tools and Adhesives
Drill
Hobby knife with #11 blade
Pencil
Tapered reamer
Side cutter
Thin CA
Hex wrench: 2.5mm
Nut driver: 5.5mm
Ruler
Medium CA
Drill bit: 1/8-inch (3mm), 3/16-inch (5mm)
Note
: If you are preparing your model for
EP flight, skip to page 36 and begin with
the section “Motor Installation.”
1. Locate the plywood engine mount template. The
template will fit into the recess of the firewall. If not, lightly
sand the edges of the template so it fits into position.
2. Use a drill and 1/8-inch (3mm) drill bit to drill the four
holes for mounting the engine. Use the inner set of holes as
shown below.
3. Use a drill and 3/16-inch (5mm) drill bit to enlarge the
holes in the firewall.
4. Note there is a slight bevel where the blind nut
contacts the back side of the firewall. Use a hobby knife
or tapered reamer to bevel the inside of the holes to fit the
bevel of the blind nut.
5. Install the blind nuts into the back side of the firewall.
Use a 3mm x 20mm socket head bolt and 3mm washer
to draw the prongs of the blind nut into the firewall, fully
seating them. Use a 2.5mm hex wrench when tightening the
socket head bolts.
