Hobbico Spectrum Assembly Instructions Manual page 18

them to the wing.
2. Use a sharp hobby knife, scissors or Lexan
shears to trim the upper fuselage at the rear for the
fin and stabilizer.
3. Test fit the upper fuselage to the stabilizer
and rudder, as well as the main fuselage. Trim as
necessary to prevent any binding of the control
surfaces. Remove the upper fuselage, and roughen
the bottom 1/8" [3mm] of the inside edge. Glue the
upper fuselage to the main fuselage using 30-minute
epoxy or R/C-56 glue. Use masking tape to hold it
in position until the glue has cured. Use a tissue
dampened with alcohol to wipe away any epoxy
that oozes out, then set the fuselage aside.
Note: The upper fuselage can also be glued using
thin CA. Tape the upper fuselage into position,
spacing the tape about 3" [75mm] apart. Place a
drop of thin CA between the pieces of tape to tack
the upper fuselage into position. Remove the tape,
and wick thin CA along the seam between the
upper fuselage and main fuselage. There is a
chance the CA may drip along the upper fuselage
and ruin the finish, so work slowly to obtain the
best finish.
4. Use the same gluing technique to glue the
®
lower fuselage to the main fuselage as shown.
The following steps cover fitting the cowl to an O.S.
engine using the stock muffler. This is the most
often used engine configuration as it allows for
adequate engine cooling and muffler installation.
5. Tape the upper, left and right cowl pieces
together to check the fit. Test fit the cowl to the
fuselage. Slowly trim the cowl to fit into position.
Once satisfied with the fit of the cowl onto the
fuselage, wick thin CA along the seams to glue the
cowl together. If the cowl is a tight fit, the seam at
the bottom can be left slightly apart, as this area
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