Top Flite TOPA0110 - Manual (Page 41)

4. Fit the balsa pieces on both sides of the
Dorsal Fin. Start by shaping the aft edge of the
balsa pieces so they overlap the fin slightly. To
save work, fit and shape the balsa pieces as well
as you can before gluing them on.
5. Glue the balsa pieces to both sides of the
Dorsal Fin and finish shaping them. Fill the area
just behind the Dorsal Fin with scrap balsa. Filler
will be required to obtain a smooth transition.
MAKE THE TOP COWLING
NOTE: The sequence below shows the
installation of an O.S. .120 Surpass 4C
pumper on a J-Tec JT-122SV soft
mount. See the fuselage plan for an
alternate engine installation.
1. Bolt the engine mount to the firewall. If
your installation requires spacers, install them
now. Bolt your engine to the engine mount. (The
plans and the photos in the cowling section, on
page 43, show the spacers.)
2. Draw a line 3/16" above the bottom edge
of the die-cut 1/16" plywood Spinner Ring. This
is the centerline of the spinner.
3. Glue scraps of 1/16" (or 3/32" for soft
mounted engines) balsa to the Spinner Ring to
act as a spacer for the spinner.
4. Tack glue the spacers on the Spinner Ring
to the backplate of the spinner. Mount the
spinner backplate to the engine.
5. Put a mark on the outside of the fuselage
side 3/4" below the centerline marked on the
firewall. This mark will designate the bottom of
the Cowl Sides (see the photos at steps 4 & 6).
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