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Ruler
SECTION 13: BALANCING THE MiG-15 EDF
YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES:
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Pencil
IMPORTANT
It is critical that your airplane be balanced correctly. Improper balance will cause your airplane to lose
control and crash!
WARNING
This is the recommended C.G. range. For test-flying we suggest you start with the C.G. in the middle of the
range, then move it farther back as you become familiar with the flying characteristics of the airplane. It is not
recommended that the C.G. be located any farther back than 3-1/2".
IMPORTANT
As you move the C.G. farther aft, the airplane will become more responsive, especially in pitch. Do not start
to move the C.G. back until you are comfortable with the flight characteristics of the airplane.
☞
Balance the MiG-15 EDF with the flight battery
installed.
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Measure and draw two small marks on the
top
of the wing, 3-3/8" back from the leading edge, measured at the
wing-to-fuselage glue joints.
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Turn the airplane upside down, place your fingers on the marks, and carefully lift the airplane. If the nose of the
airplane falls, the airplane is nose heavy. To correct this, move the flight battery 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 flight battery 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.
☞
Once you have flown and become familiar with the flight characteristics of the airplane, the C.G. can be moved forward
or aft up to 1/8" 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 less responsive, but more stable.
Do not fly the airplane beyond the recommended balance range or an uncontrollable crash could result!
Center of Gravity Location:
3-1/4" to 3-1/2" back from the leading edge of the wing, measured at the glue joint.
SECTION 14: CONTROL THROWS
We recommend setting up the MiG-15 EDF using the control throws listed below. These control throws are suggested for
initial test-flying because they will allow the airplane to fly smoother and make it easier to control.
TEST-FLYING
Ailerons:
3/16" Up and Down
Elevator:
3/16" Up and Down
☞
When measuring the control throws, measure from the widest point of the control surfaces.
Continued on Next Page
