38
Step 3.
Use a Moto-tool and a carbide cutter to make the
cylinder head and needle valve openings in the cowl.
Note:
For illustration purposes, we have shown an
MDS 1.48 glow engine mounted in the Edge 540.
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 6
1
/
4
'' from the firewall. This should provide
an approximate 3/16'' clearance between the cowl and the
spinner backplate when mounted on the engine. Re-adjust the
cowl or engine 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 clearance (1/8''
around the engine and muffler). Make sure the prop hub is
centered in the opening in the cowl.
Step 6.
There will be two-button head hold-down screws
located on either side of the cowl. With the cowl in position, the
top screw is located 1
1
/
2
'' from the edge of the cowl to the front,
1
/
2
'' down from the blue/yellow color line on the top of the cowl.
The bottom screw is located directly below the top screw, 3
1
/
4
'' at
a location 1
1
/
2
'' from the edge of the cowl and 3/8'' up from the
yellow/blue color line at the bottom of the cowl.
Step 7.
Once the mounting holes have been marked, drill the
holes on each side of the cowl using a 1/16'' drill bit. Be sure to
use masking tape to hold the cowl securely in position
Step 8.
Remove the cowling and enlarge the four holes in the
cowling just enough to fit the rubber grommets in place.
Note:
On some engines where the carburetor is not easily
accessible, a a fuel dot can be used. Hangar 9’s gold
anodize machined aluminum fuel dot with “T” coupler
(HAN115) is an excellent choice and should be
available at your local hobby shop.
Step 9.
Align the cowling on the fuselage and secure it with the
button head screws. Do not overtighten the screws by smashing
into the rubber grommets, as this will take away the vibration
isolation of the grommets.
Step 10.
Self-adhesive red trim tape is provided for trimming
the cowl.
Section 16: Attaching the Cowling
CONTINUED
Summary of Contents for EDGE 540
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