Hangar 9 Twin Otter ARF Assembly Manual page 40

Step 8
Use a 3/32-inch hex wrench to secure the wing strut to
the wing with a 4-40 x 3/4-inch Allen head machine screw.
Step 9
Thread a 1/4-20 x 2-inch nylon bolt into the wing
panels to secure them to the fuselage.
40
Step 10
Set the top hatch in place on the fuselage and mark
the mounting hole locations with a pencil.
Step 11
Use a 1/16-inch drill bit in a pin vise to drill the
mounting holes in the fuselage. Apply a small drop of
thin CA to each of the holes to strengthen the wood.
Allow the CA to cure without using accelerator.
Step 12
Use a #1 Phillips screwdriver to install the hatch with
four #2 x 1/4-inch woodscrews.
Twin Otter ARF Assembly Manual