Top Flite TOPA0410 - Manual (Page 47)

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FIT THE RETRACTABLE TAILGEAR
❏ 1. Use the fuse plan to locate the tail gear opening. Start
by cutting a small hole in the bottom of the fuse, gradually
increasing its size while test fitting the retract. You will
need to cut the bottom stringer and former F-9 to allow the
retract to fit.
❏ 2. Center the tail gear retract in the opening. Mark the
retract braces for the mounting screws. If you are installing
the Robart tail gear retract, drill 7/64" pilot holes through
the retract braces. Attach the retracts to the braces with
#6 x 5/8" sheet metal screws (not included).
❏ 3. Remove the retract and apply several drops of thin
CA to each screw hole to harden the wood.
INSTALL THE ENGINE
The following instructions are for mounting the US
Engines 41cc on the Great Planes Isolation Mount. If you
are installing a different engine and engine mount, follow
the instructions included with the engine and engine
mount. Note: You previously prepared the firewall for
engine installation, before gluing the firewall on the fuse.
❏ 1. Position the engine on the plywood isolation plate,
checking that the mounting holes in the engine align with
the hole locations on the isolation plate. Approximately
5/8" [15.9mm] will need to be trimmed from the bottom of
the plywood plate to provide muffler clearance.
❏ 2. Drill a 17/64" [6.7mm] clearance hole at each mark.
Mount the engine to the isolation plate with four 1/4-20 x
3/4" [1/4-20 x 19mm] bolts and 1/4" [6.4mm] flat washers
(not included).
❏ 3. Mount the isolation plate to the firewall with the rubber
grommets and bolts included with the isolation mount.
❏ 4. On the US Engines 41, we moved the throttle connector
arm to the other arm on the bellcrank. This will allow the
throttle pushrod to exit the firewall in a better location.
❏ 5. Mount the throttle servo in the forward opening in the
servo tray.
Important: The throttle linkage is not included in the Giant
Corsair Kit allowing you to use the method you prefer. We
recommend that whatever method you use, do not use a
metal pushrod or cable from the engine to the servo. This
may allow electrical interference from the engine to be
transferred to the radio system. The following method is
one possible throttle pushrod system that works very well.