Hangar 9 P-51D Blue Nose 60 ARF - Manual (Page 25)

48 Hangar 9 P-51 Mustang 60 ARF Assembly Manual 49 Hangar 9 P-51 Mustang 60 ARF Assembly Manual
Important : A plywood spacer has been included if
your engine is too short to achieve the correct distance
between the drive washer and firewall. The spacer
must be secured to the firewall with epoxy and placed
between the mount and firewall. You will also need to
purchase four 8-32 x 1 1 /
4
-inch bolts to attach the mount
to the firewall spacer.
Hint : You can loosen the mounts on the firewall to
make it easier to install the engine. Just make sure the
mounts are tight before tightening the engine mounting
bolts.
 Step 15
Remove the arms from the throttle servo that will not be
used so they don’t interfere with the operation of the servo.
Use an arm that has a hole that is 1/2-inch (13mm) from the
center of the servo horn.
 Step 16
Slide the plywood pushrod support on the pushrod at this
time. Do not glue the support until instructed to do so.
 Step 17
Thread a clevis on the 13 1 /
4
-inch (335mm) pushrod wire.
Make sure to slide a piece of safety tubing on the clevis.
 Step 18
Insert the pushrod into the pushrod tube from the outside of
the fuselage. Attach the clevis to the carburetor arm.
 Step 8
Slide the pushrod tube in the hole in the firewall. Position the
tube so 2 5 /
8
-inch (67mm) is exposed forward of the firewall.
Use medium CA to glue the tube to the firewall.
 Step 9
Position the throttle servo on the same side of the fuselage
as the pushrod tube and the output of the servo facing the
rear of the fuselage. Use a pencil to mark the locations for
the four servo mounting screws.
 Step 10
Remove the servo and use a drill with a 1/16-inch (1.5mm)
drill bit to drill the holes necessary for the servo mounting
screws.
 Step 11
Place 2–3 drops of thin CA in each hole to harden the
surrounding wood.
 Step 12
Use the screws provided with the servo and a #1 Phillips
screwdriver to secure the throttle servo in the fuselage. Make
sure to plug the throttle servo into the throttle channel of the
receiver at this time.
 Step 13
Use the radio system to center the throttle servo. With the
throttle stick and trim centered, the arm should be positioned
as shown in the previous photo. This will provide an equal
amount of travel to both full and closed throttle.
 Step 14
Use four 8-32 x 1 1 /
4
-inch socket head bolts, four #8 washers
and four 8-32 lock nuts to secure the engine. Make sure
the engine is positioned so the driver washer is 5 7 /
16
-inches
(138mm) forward of the firewall. A 9/64-inch hex wrench or
ball driver and a 11/32-inch nut driver or socket will make
tightening the bolts quick work.