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# 1 Phillips Head Screwdriver
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Ruler
SECTION 14: BALANCING
YOU'LL NEED THE FOLLOWING SUPPLIES:
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Masking Tape
IMPORTANT
It is critical that your airplane be balanced correctly. Improper balance will cause your airplane to lose control and crash!
Center of Gravity Location:
2-7/8" back from the leading edge of the wing, at the fuselage sides.
WARNING
This location is recommended for initial test flying. The C.G. can be moved fore or aft up to 1/4", but it is not
recommended that the C.G. be located any farther back than 3-1/8".
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Balance the Crazy-8 with the flight battery installed.
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Install the wing and belly pan onto the fuselage.
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Apply two pieces of masking tape onto the top of the wing, 2-7/8" back from the leading edge, at the fuselage sides.
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Turn the airplane upside down, place your fingers on the masking tape, and carefully lift the airplane. If the nose of
the airplane falls, the airplane is nose heavy. To correct this, move the battery pack and/or receiver back far enough to
bring the airplane into balance. If the tail of the airplane falls, the airplane is tail heavy. To correct this, move the battery
pack and/or receiver forward enough to bring the airplane into balance. When balanced correctly, the airplane should sit
level or slightly nose down when you lift it up with your fingers at the C.G. location.
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Once you have flown and become familiar with the flight characteristics of the airplane, the C.G. can be moved fore
or aft up to 1/4" in each direction to change the flight performance. Moving the C.G. back will cause the airplane to be
more responsive, but less stable. Moving the C.G. forward will cause the airplane to be more stable, but less responsive.
Do not fly the airplane beyond the recommended balance range or an uncontrollable crash could
result!
