Hangar 9 P-51D Mustang Sport 40 ARF Assembly Manual page 31


Step 2
Use a pin vise and 5/64-inch (2mm) drill bit to enlarge the
hole in a 180-degree servo horn that is 5/8-inch (15mm)
from the center of the arm.

Step 3
Use side cutters to remove the excess arm from the horn so
it does not interfere with the operation of the servo.
Hangar 9 P-51D Mustang Sport 40 Assembly Manual

Step 4
Use the radio system to center the flap servo. Install the arm
so it is perpendicular to the servo center line as shown.

Step 5
Remove the servo cover from the wing. Position the servo
on the cover so the servo horn is centered in the slot in the
cover as shown.

Step 6
Use a pencil to mark the position of the servo mounting tabs
on the cover.

Step 7
Use medium grit sandpaper to lightly sand the end of the
block that will rest against the servo cover.
Sand this end
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