Hangar 9 Alpha 40 ARF Assembly Manual page 28

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Step 7
Use a hobby knife to remove the covering from the slot on
the top of the fuselage for the fin.

Step 8
Use a hobby knife with a #11 blade to remove the covering on
the bottom of the fuselage for the stabilizer attachment screw.
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
Step 9
Slide the fin into position on the fuselage as shown.
o
Step 10
Locate a #4 washer and 3mm x 10mm machine screw. Slide
the washer onto the screw, then apply a small amount of
threadlock on the screw.
o
Step 11
Insert the screw into the hole in the fuselage and through
the stabilizer to the preinstalled blind nut on the top of the
stabilizer. Use a #2 Phillips screwdriver to tighten the screw.
Hangar 9 Alpha 40 ARF Assembly Manual