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1-1/2"
38 mm
Front Edge of
Back Edge Of
Back FIN-
Motor Tube
LOK™ Ring
Thrust
Ring
Thrust
Ring
Flange
1. Cement the thrust ring flange (1/16"/1.6 mm thick) to the
thrust ring (7/16"/11 mm long). Set the thrust ring assem-
bly aside to dry.
2. Find the line drawn along the side of the motor tube. Using
the Location Guide printed along the top edge of this
instruction sheet, cut a 1/4" (6 mm) long slot 4-5/8"
(117mm) from the back end of the motor tube and next to
the line on the motor tube as shown.
3. Using the Location Guide, make a mark along the motor
tube line 3-9/16" (91mm) from the back end of the motor
tube. This mark locates where the back edge of the front
AERO-FIBRE™
Centering
Ring
NOTE: FROM THIS POINT ON, DO NOT USE ANY
CEMENT UNTIL REACHING ASSEMBLY STEP 5.
1. With their motor hook channels aligned with the motor
hook, slide a FIN-LOK™ ring and then an AERO-FI-
BRE™ centering ring over the front end of the motor
tube. Push on the centering ring until the back edge of the
FIN-LOK™ ring is moved to the forward most mark made
in Step 3 above. (NOTE: The rings are designed to be a
tight fit on the motor tube. If the rings are difficult to slide
onto the motor tube, round the inside edges of the rings
with sandpaper. If the FIN-LOK™ rings need to be turned
3"
76 mm
3-9/16"
91 mm
Tube Coupler
Marking Guide
MOTOR TUBE ASSEMBLY
Motor
Hook
Motor
Tube
FIN-LOK™ ASSEMBLY
FIN-LOK™
Ring
4-5/8"
117 mm
Motor
Back Edge Of
Hook
Front FIN-LOK™
Slot
Ring
Line
1-1/2"/38mm And 3-9/16"/91mm
FIN-LOK™Ring
From Back Edge Of Motor Tube
Location Marks
FIN-LOK™ ring will be. Make another mark 1-1/2"(38mm)
from the back end of the motor tube. This mark locates
where the front edge of the rear most FIN-LOK™ ring will
be.
4. Insert the tab of the motor hook into the slot cut into the
motor tube. Use a small dowel to apply several drops
of cement around the inside of the motor tube just
behind where the motor hook comes through the
motor tube wall. Then, with the thrust ring flange facing
the back of the motor tube, insert the thrust ring assembly
into the motor tube until it stops, against the motor hook
tab.
Front
Motor
Tube
after they are on the motor tube, use a small piece of cloth
to provide a better grip.)
2. Slide the other FIN-LOK™ ring and then a centering ring
over the back end of the motor tube. Push on the
centering ring until the front edge of the FIN-LOK™ ring
is at the rear-most mark made in Step 3.
3. Using the line on the motor tube as a guide, gently twist the
back centering ring slightly until the fin locks of the back
FIN-LOK™ ring are aligned with the fin locks of the front
FIN-LOK™ ring.
2
A/D-2
LOCATION
1/4"
6 mm
GUIDE
Front
End
Slot For
4-5/8"/117mm
Motor
From Back Edge of
Hook
Motor Tube
FIN-LOK™
Ring
End
Motor
Hook
Channels
1/2"
13 mm
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