10
❏ ❏
4. Extend the retract. View the wheel from
directly above. Adjust the strut so that the wheel
is parallel to the root of the wing. Lock the strut in
position by applying a drop of threadlocker to the
threads and securely tightening the bolt at the top of
the strut.
❏ ❏
5. Double check that the wheel will fully retract
into the wing. Extend the retract to make sure it does
not interfere with any part of the wing and that the
retract is operating smoothly.
❏ ❏
6. Hold the retract in the wing. Using the mounting
holes as a guide, drill 7/64" [2.8mm] pilot holes into the
retract rails. Caution: Do not inadvertently drill into the
air cylinder when you get to the middle hole. Mount
the retracts with fi ve #6 x 3/4" [19.1mm] sheet metal
screws, one in each corner and one in the middle as
shown. Use one #6 x 1/2" [12.7mm] sheet metal screw
in the hole over the air cylinder.
❏ ❏
7. Remove the six screws and retract and apply
a couple of drops of thin CA in the holes.
❏ ❏
8. Cut the covering from the holes in the top of
the wing for the servo wires and the airline tubing.
❏ ❏
9. Cut a 21" [533mm] piece of red air line
tubing and a 23" [584mm] piece of purple air line
tubing from the tubing included with the Robart Air
Control Kit (not included). Connect the red line to
the front of the air cylinder and the purple to the
back of the air cylinder.
❏ ❏
10. Connect the two pieces of air line tubing to
the string in the retract bay. Guide the airline tubing
through the front of the retract bay, through the fl ap
bay and out the hole in the top of the wing. Also pull
the aileron servo lead out the hole. Tape the airline
and aileron servo lead to the top of the wing. Remount
the retract in the wing.
❏ ❏
11. Use a sharp hobby knife to remove the
covering from over the fi ve mounting holes in the
plywood retract cover. Set the retract cover over the
retract and drill a 1/16" [1.6mm] pilot hole using the
holes in the cover as a guide.
❏ ❏
12. Mount the retract cover to the wing with fi ve
#2 x 3/8" [9.5mm] fl at head sheet metal screws.
❏ ❏
13. Cut two of the landing gear door drill guides
from the back of the manual. Place the drill guides
in the rectangle recesses of the landing gear door.
Place the landing gear door on a piece of scrap wood
and drill a 1/8" [3.2mm] hole through the door at the
marked hole location.
