18
E-flite Alpha Sport 450 PNP Assembly Manual
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 Alpha 450 is 3
1
/
4
to 3
1
/
2
(82 to 88mm) back from
the leading edge of the top wing. Mark the location for
the Center of Gravity on the bottom of the top wing in
the center as shown.
When balancing your Alpha 450 Sport 450, support
the plane upright at the marks made on the bottom of
the wing with your fingers or a commercially available
balancing stand. Move the motor battery as necessary
so the model hangs level or slightly nose down. This is
the correct balance point for your model.
BALANCEd MOdEL
NOSE hEAvy - MOvE BATTERy BACK
If the model is positioned with the nose facing
downward as shown in the illustration, it will be
necessary to move the battery rearward in the battery
compartment to achieve the correct Center of Gravity.
TAIL hEAvy - MOvE BATTERy fORWARd
If the model is positioned with the tail facing
downward as shown in the illustration, it will be
necessary to move the battery forward in the battery
compartment to achieve the correct Center of Gravity.
Once you model is balanced correctly, it is
recommended to mark the position of the battery in the
battery compartment using a pencil or felt-tipped pen.
This way it can be returned to the same location after it
has been removed for charging.
After the first flights, the CG position can be adjusted
for your personal preference.
