User Manual

37
Parts Needed
• Fuselage
• Fiberglass cowl
• Machine head screws (4)
Tools and Adhesives Needed
• Drill
• Drill Bit: 1/16"
• Masking tape
• Moto-tool with sanding drum
• Carbide cutter
• Ruler
• Sanding stick (medium)
• Felt-tipped pen or pencil
Step 1. Cut out a U-shaped opening in the bottom of the cowl.
This will also allow for air flow around the cylinder. A template
for the cowl opening is also provided.
Step 2. Make a template of the cylinder head of the engine you
are going to mount in the Aresti 40
™
. Mount the engine and
place the template over it. Use a piece of cardboard or heavy
paper that can be taped to the fuselage and folded back. Remove
the engine, fold back the template and slide the cowl over the
fuselage. Unfold the template so it rests on the cowl at the posi-
tion where the engine cylinder will be located. Mark the cowl for
the engine cylinder opening. The same process can be done to
locate where the needle valve will exit the cowl.
Step 3. Use a moto-tool and a carbide cutter to make the
cylinder head and needle valve openings in the cowl.
Note: We have shown an MDS
™
.40 glow engine
mounted in the Aresti 40. If you use a different engine,
it will be necessary to make the appropriate template
and mark the cowl to fit the engine you have.
Step 4. Mount the engine in the aircraft. Slide the cowl onto
the fuselage. Trial fit the cowl to the engine installed. Mount
the muffler and trial fit again. Make sure the engine is mounted
so the prop drive hub is 4
5
/
8
" from the firewall. This should
provide a approximately 3/16" clearance between the cowl and
the spinner backplate when mounted on the engine. Re-adjust
the cowl or engine on motor mount if necessary to obtain the
proper clearance.
Step 5. Tape the cowl securely in position and check to make
sure it fits correctly. There should be ample (1/8" around the
engine and muffler) clearance. Check to make sure the prop hub
is centered in the opening in the cowl.
Step 6. There will be two hold-down screws located on either
side of the cowl. With the cowl in position, the top screw is
located 1/2" from the edge of the cowl to the front. The bottom
screw is located below the top screw, as shown at a location
1/2" from the edge of the cowl.
Section 16: Attaching the Cowling