Top Flite TOPA0410 - Manual (Page 48)

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❏ 6. Install a 2-56 pivot ball on the throttle bellcrank. Snap
a ball end onto the pivot ball. Mark the isolation plate in
line with the ball end and drill a 3/16" [4.8mm] hole at the
mark through the plate and firewall. If you don’t have a
long 3/16" [4.8mm] drill bit you may need to remove the
engine to drill the holes.
❏ 7. Roughen a 3/16" [4.8mm] outer pushrod tube with
320 grit sandpaper. Glue the outer pushrod tube in the
3/16" hole in the firewall, flush with the front of the firewall.
Cut off the outer pushrod tube approximately 2" [50.8mm]
from the servo arm.
❏ 8. Screw a 2-56 x 1" [2-56 x 25.4mm] threaded stud 1/2"
[12.7mm] into one end of the inner nylon pushrod. Screw a
nylon ball end 14 turns onto the 2-56 threaded stud. Slide
the inner pushrod into the outer pushrod tube and connect
the ball end to the pivot ball on the throttle bellcrank.
❏ 9. Mark the inner pushrod 2" [50.8mm] from the throttle
servo arm. Remove the inner pushrod and cut the
pushrod 1" [25.4mm] shorter than the mark.
❏ 10. Screw a 2-56 x 12" [2-56 x 304.8mm] metal pushrod
14 turns into the end of the nylon inner pushrod. Slide the
inner pushrod into the outer pushrod tube. Attach a
Screw-Lock Pushrod Connector to the throttle servo arm
and slide the 2-56 metal pushrod through the pushrod
connector. Switch on the radio system and adjust the
throttle linkage so that the carburetor opens and closes
completely. Make an outer pushrod tube support from
leftover balsa and glue it to the outer pushrod tube and
fuse, close to the end of the outer tube.
❏ 11. Make a fuel fill valve mount from leftover 1/8"
[3.2mm] plywood. Install a fuel fill valve in the fuel fill valve
mount. If you are using a gas powered engine, be sure to
use a fuel fill valve designed for gasoline. Glue the mount
to F-1 so that the front of the valve is flush with the side of
the fuse.
❏ 12. Drill a clearance hole in the isolation plate and two
holes in the firewall for the fuel line to pass through.
Assemble your fuel tank. If you are using a gas powered
engine, be sure to use a fuel tank that is compatible with
gasoline. Wrap the fuel tank in foam rubber and insert it in
the front of the fuse. Mark the location for the die-cut 1/8"
[3.2mm] plywood fuel tank floor (TF). Remove the fuel
tank and glue the floor in place. Use several leftover
pieces of balsa to reinforce the joint between the fuel tank
floor and the fuse.
ASSEMBLE THE COWL
❏ 1. Trim the front, back and sides of the plastic cowl
along the molded cut lines. You can use a hobby knife to
carefully score along the cut lines and flex the plastic until
it breaks free, or use a small scissors to cut along the
lines. Hobbico
® Curved Tip Canopy Scissors (HCAR0667)
work extremely well for this. Drill a 3/16" [4.8mm] mounting
hole at each dimple on the back cowl mounting lip.