Top Flite TOPA0708 - Manual (Page 17)

17
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6. Install a 2-56 ball link ball on the choke arm and
secure it with a 2-56 nylon nut.
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7. Temporarily install the engine inverted on the
aluminum standoffs. Determine on which side of the
fuselage the throttle and choke servos need to be
installed.
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8. Snap a nylon ball socket onto both pivot balls.
Center the choke and throttle arms and mark the fi rewall
where the pushrods will need to pass through.
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9. Drill a 3/16" [4.8mm] hole at the marks on the
fi rewall for the throttle and choke pushrods. You may
fi nd it easier to remove the engine before drilling the
holes. Cut two 11" [279mm] long outer pushrod tubes
from the 36" [914mm] long outer pushrod tube. Use
medium sandpaper to roughen the outer pushrod tubes.
Clean the tubes with denatured alcohol and insert the
tubes into the previously drilled holes in the fi rewall.
Route the tube through the slot in the former until it is
fl ush with the front of the fi rewall. Use thin CA to glue
the tubes to the fi rewall.
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10. Apply a drop of threadlocker to the engine
mounting bolts. Reinstall the engine on the standoffs
using the bolts and washers supplied with the engine.
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11. To make a throttle pushrod, thread a 2-56 x 1"
[25mm] threaded rod approximately 3/8" [9mm] into the
end of the white inner pushrod tube. Thread a nylon ball
link socket onto the threaded rod. For the DLE engine,
trim the throttle pushrod 12-1/2" [318mm] long.
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12. Make a ½" [12mm] long L-bend at the non-
threaded end of the 2-56 x 6" [152mm] metal pushrod.
Thread the other end ¾" [19mm] into the end of the
throttle pushrod tube. The L-bend makes it easier to
thread in.
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13. Cut off the L-bend from the 2-56 x 6" [152mm]
pushrod. Insert the throttle pushrod into the throttle
outer pushrod tube. Attach the ball link socket to the
ball link ball on the throttle arm.
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14. To make the choke pushrod, trim approximately
1/8" [3.2mm] from the end of the nylon ball socket before
threading the 2-56 x 1" [25mm] threaded rod into the
end. Also trim the threaded rod so that 3/8" [9.5mm]
of the rod remains from the white inner pushrod tube.
Trim the choke pushrod 12" [305mm] long.
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15. Make a ½" [12mm] long L-bend at the non-
threaded end of the 2-56 x 6" [152mm] metal pushrod.
Thread the other end ¾" [19mm] into the end of the
choke pushrod tube. Cut off the L-bend from the 2-56 x
6" [152mm] pushrod. Insert the choke pushrod into the
choke outer pushrod tube. Attach the ball link socket to
the ball link ball on the choke arm.