Center Of Gravity - Hangar 9 Funtana 125 Assembly Manual

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Step 14
Secure the canopy hatch using two 3mm x 12mm hex head
bolts and two 3mm washers. Tighten the bolts using a
2.5mm hex wrench.
52

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
Funtana is 6 / -inch–6 / -inch (162mm–171mm) behind the
3 3
8 4
leading edge of the wing against the fuselage.
Note: The CG can also be measured at the wing tip.
This measurement is 3 / -inch–3 /
1 1
8 2
89mm) behind 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 upright 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.
-inch (80mm–
After the first flights, the CG position can be adjusted for
your personal preference.
Hangar 9 Funtana 125 ARF Assembly Manual