Top Flite TOPA0120 - Manual (Page 33)

❑ 2. Use the die-cut 1/8” plywood Dash Gauge
(DG) to set the angle of the die-cut 1/8” Former
F-3B. Glue Former F-3B securely at set angle.
Do not glue in the dash gauge.
❑ 3. Glue in the 1/8” die-cut plywood former top
F-2B. Make sure F-2B is perpendicular to the
crutch.
❑ 4. There are punch marks in the die-cut 1/8”
plywood Former F-1A (Firewall). These locate the
engine center lines. Draw lines connecting the
points as shown in the photo at step 6.
❑ 5. The centerline of the engine is positioned
on the horizontal and vertical lines on the firewall.
The engine is offset to the left side of the model.
This allows the spinner to be on the centerline of
the model, despite the right thrust.
NOTE: The lines through the punch
marks set the proper amount of engine
offset and engine tilt to clear the
exhaust header. Any changes must be
rotated about the intersection of the
lines shown, which indicate the engine
centerline.
NOTE: If you use the included
adjustable engine mount, place it on the
engine to determine proper spacing.
You should use the 4 holes indicated by
the punch marks on F-1A regardless of
the width the mount is adjusted to. In
most cases, you will be required to use
the included spacer plates when using
this mount. Refer to the fuselage
bottom view on the plans for a typical
2-cycle installation.
❑ 6. Mark the locations of the mounting bolts for
your engine mount. NOTE: If using the adjustable
engine mount, make sure the centerline on the
firewall is centered between the "tick marks" on the
mount. You may find it convenient to also mark
locations for the fuel lines and the throttle pushrod
at this time. Epoxy F-1A in place and drill pilot
holes for the engine mount bolts. NOTE: Photo
shows J-Tec JT-122(SV) engine mount.
❑ 7. Slide F-1C into place behind F-1A. The
tops of F-1A and F-1C should be even. Make any
adjustments to F-1C until it fits well. Glue F-1C in
place.
❑ 8. Install the 1/8” x 3/4” x 3” Firewall Backup
strips to backup the firewall where the bolts for
your mount pass through. Refer to the firewall
cross-section on the plans for a typical location.
❑ 9. This is a good time to apply fuel proofing
inside the nose section. 30-minute epoxy works
great for this.
❑ 10. If you have all your engine mount parts
available, install them temporarily now and pull in
any blind nuts, etc., into place.
❑ 11. Cut a 3/16" x 3/16" x 24" balsa Stringer in
half. Install the Stringers in the slots on the top of
the fuselage.
❑ 12. Cut the Forward Deck Sheeting out of
3/32” x 2-1/4” x 24” balsa sheet. NOTE: The Fwd
Deck Sheeting at the base of the dash extends
approximately 1/4” aft (see plans). The sheeting
should extend past the firewall and be trimmed
square to the fuselage sides about 1/4" in front of
the firewall.
❑ 13. Glue a Forward Deck Sheet to the
fuselage along the top edge of the fuselage side.
Wet the deck sheeting using a damp paper towel.
Apply CA+ to the formers and stringers. Bend the
wood around and attach it to formers F-2 and F-3
first. You may hold the sheeting in place with
masking tape.
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