Hangar 9 Beast 100cc ARF - Manual (Page 56)

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Balancing the Model
This is a very important step that should not be skipped before your first flight. Balancing
the model correctly not only improves the flying performance but also reduces the amount of
coupling.
The best Center of Gravity is at 63mm from the leading edge of bottom wing toward the trailing
edge of the wing. The range of the CG is from 60-70mm. Use masking tape and mark the
range and recommended CG on both bottom wings. Ask someone to help you by picking up the
model from the other side. Make sure to pick up the model from a rib or strong location to avoid
any damage.
Plane Assembly
1. Start by Bottom wing assembly.
Each bottom wing panel is attached to the fuselage with two 1/4-20 plastic bolts. Do not forget
the CF anti-rotation pin.
2. Attaching the top wings.
Each wing panel is attached to mid-wing section with (2) 6-32 bolts and washers.
Use a short (1.5-2 inches long) 7/16-inch hex driver for ease of use.
3. Interplane struts attach top and bottom wings together with (4) 4-40 screws and washers
using a 3/32-inch hex driver. Note that left and right interplane struts are different.
4. The canopy uses (2) 6-32 screws and washers.
To keep track of your assembly, it is best to keep all of your bolts and washers pertaining to
your plane in a small box such as a matchbox case. By the time the plane is put together at the
field that box should be empty.