46
Hangar 9 P-51D Mustang Sport 40 Assembly Manual
Step 4
Locate the 4-40 x 3/4-inch socket head screw, #4 washer
and #4 lock washer. Slide the lock washer onto the screw,
then slide the washer onto the screw.
Step 5
Use the screws and a 3/32-inch ball driver or hex wrench to
secure the wing to the fuselage. If the screw does not go in
easily, you may need to double-check that the wing is tight
against the fuselage.
Step 6
You can now slide the remaining wing panel onto the wing
tube. Plug the aileron extension from the aileron servo
into the Y-harness in the fuselage, then slide the wing tight
against the fuselage. Repeat Steps 5 and 6 to secure the
wing panel to the fuselage.
Center of gravity
An important part of preparing the aircraft for flight
is properly balancing the model.
Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) location for the
model is 3
3
/
4
-inch (95mm) behind the leading edge of the
wing against the fuselage. The CG range for your model is
3
1
/
2
to 3
7
/
8
inches (89mm to 98mm) from the leading edge of
the wing.
If necessary, move the battery pack or add weight to either
the nose or the tail until the correct balance is achieved.
Stick-on weights are available at your local hobby shop and
work well for this purpose.
When balancing your model, support the plane inverted
at the marks made on the wing with your fingers or a
commercially available balancing stand. This is the correct
balance point for your model. You might find you may be
required to add a small amount of weight to either the front
or back of the fuselage to achieve the correct balance.
Lifting the Model and Observations
The P-51D Mustang is balanced using either your fingers or
a balancing stand. Place or lift the airplane so it is supported
at the marks made in the previous step. The plane will rest
level when balanced correctly. If not, self stick weights must
be added to correct any balancing problems.
