Hangar 9 P-51 Mustang ARF Assembly Manual page 11

 
Step 11
Cut a piece of plastic from one of the bags the wing was
packaged in. Tape the plastic so it is between the wing and
flap linkage, but does not cover the hinge slot. This will
keep you from gluing the flap linkage to the wing in the
following steps.
 
Step 12
Slide the flap in position. Check that it can move freely
without rubbing against the aileron or wing. The flap
linkage will go into the pre-drilled hole in the flap, and the
hinges into the slots in the wing.
Note: You will need to work quickly for the
following step. Be prepared to position the
flap as soon as the epoxy has been applied as
described.
Section 1: Hinging the Ailerons and Flaps
 
Step 13
Once the fit has been checked, remove the flap from the
wing. Mix about a tablespoon of 6-minute epoxy and
apply it to the flap linkage. Use a toothpick to apply the
epoxy into the hole and slot in the flap. Slide the flap in
position and check the movement as described in Step 12.
 
Step 14
Once the epoxy has cured, apply CA to the flap hinges as
described back in Step 6 for the aileron hinges. The flap
may not deflect very far upwards so do not force it to do
so. Remember to apply CA to both the top and bottom.
 
Step 15
Remove the plastic taped onto the wing back in Step 11.
Move the flap down, and up if possible, to break in the
flap hinges.

Step 16
Repeat Steps 1 through 15 to install the remaining aileron
and flap to the remaining wing panel.
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