Hangar 9 P-51D Blue Nose 60 ARF - Manual (Page 13)

24 Hangar 9 P-51 Mustang 60 ARF Assembly Manual 25 Hangar 9 P-51 Mustang 60 ARF Assembly Manual
 Step 16
Use a hobby knife with a #11 blade to cut a 1/4-inch (6mm)
piece of tubing from the 2-inch (52mm) safety tubing
included with the kit. Slide the tubing on a clevis, and then
thread the clevis 10 turns on the flap pushrod.
 Step 17
Slide the flap pushrod into the wing, bent end first. Connect
the clevis to the outer hole of the flap control horn. Slide the
safety tubing on the clevis so it won’t accidentally open in
flight.
 Step 18
At this time you will want to mark the leads for the aileron,
retract and flap servos so each can be identified as they are
going to be hidden inside the wing. Tie the string around all
three leads and carefully pull them through the wing and out
through the hole.
Hint : If you have a short extension or Y-harness handy,
you may want to attach it temporarily to the flap servo
lead as it will make it easier to connect the flap servo
to the receiver while the servo installation is being
finalized.
 Step 19
Use a pushrod keeper to connect the flap pushrod to the flap
servo horn.
 Step 20
If you have a three-position flap switch, it is recommended
to set the endpoint to 0%. This will make installing the flap
much easier.
 Step 21
Place the flap servo into position and check the
measurement for the mid flap setting. You may need to
adjust the length of the pushrod to achieve the correct
measurement.
Note : If you have a two-position switch, you will not
need to make this measurement. You will only be
setting the ‘up’ and “down” flap positions.
Important : Do not operate the flap using the radio
system at this time. If the throws are too great, it could
damage the servo if the servo moves more than the flap
can. Setting the throws to 0% at your radio as a starting
point is the best method for installing the flap servo. If
you have not set the throws to 0%, simply lift the flap
servo cover from the wing BEFORE operating the flap
servo from the radio system to make sure the servo
does not bind when operated.
 Step 10
Use a 5/64-inch (2mm) drill bit and pin drill to enlarge the
hole in the flap servo horn.
 Step 11
Position the servo between the blocks. Leave a small gap
of 1/32-inch (1mm) between the servo cover and servo to
prevent vibrations from the airframe from being transferred
directly to the servo. Use a pencil to mark the blocks for the
four servo mounting screws.
Hint : Place a 1/32-inch (.5mm) spacer between the
servo and the servo hatch cover before marking the
mounting holes.
 Step 12
Remove the servo. Use a drill and 1/16-inch (1.5mm) drill bit
to drill the four holes for the servo mounting screws.
 Step 13
Apply 2–3 drops of thin CA into each hole to harden the
surrounding wood. This provides a harder surface for the
screws making them more secure when installed.
 Step 14
Use the screws provided with the servo to secure it to the
servo mounting blocks. Use a #1 Phillips screwdriver to
tighten the servo mounting screws.
 Step 15
Prepare the flap pushrod by making a 90-degree bend that
is 2 7 /
16
-inch (63mm) from the threaded end of the pushrod.
Measure 3/8-inch (10mm) from the bend and use side
cutters to trim the pushrod wire.