C/G And Balancing - Model Tech Fun Fighters P-51 ARF Assembly Instructions Manual

step 2: instaLLing the canopy
❑ When satisfied with the alignment, glue the canopy into place, using a thin layer of Formula 560 Canopy Glue. Remove any
excess glue before it dries, using a paper towel and water, and use pieces of masking tape to hold the canopy in place until the glue
fully cures.
STEP 3: INSTALLINg THE RECEIvER, BATTERY AND SWITCH HARNESS
❑ Wrap the receiver and battery in foam rubber to protect them from vibration. Use masking tape or rubber bands to hold the foam
rubber in place.
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Do not wrap the foam rubber too tightly or its vibration dampening quality will be reduced.
IMPORTANT We don't suggest permanently installing the receiver and battery until you have balanced the airplane. How the
airplane initially balances will determine where you need to mount them.
❑ After you've found the final location of the receiver and battery, mount them into the fuselage using your favorite method.
Cut
Remove This
Servo
Horn
Antenna
Modified Servo Arm
❑ Mount the switch to the fuselage side (opposite the muffler) and connect the battery lead to the switch, and the switch and servo
leads to the receiver.
IMPORTANT It is critical that your airplane be balanced correctly. Incorrectly balancing your airplane can cause your airplane
to lose control and crash!
BAlANCe PoINT (C/G):
2-3/4" to 3-5/16" (70 to 85mm) back from the leading edge of the wing, measured at the fuselage sides.
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IMPORTANT Balance the airplane with the fuel tank empty.
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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 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.
At 2-3/4" (70mm), it takes full throw for the flare on landing, but is stable and flies nice.
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At 2-15/16" (75mm), the airplane should not high speed tip stall when using full rate elevator throw and this setting makes the
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elevator more responsive.
At 3-5/16" (85mm), it can high-speed snap roll but flies nice.
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❑ Set the canopy onto the fuselage and align it. When aligned properly,
the front edge of the canopy should be approximately 5-3/4" (146mm)
behind the back edge of the cowling and the canopy should be centered
from side-to-side when viewed from the front.
Portion
Rubber Band
❑ After installing the receiver, run the antenna out the bottom of the
fuselage (behind the wing saddle) and secure it to the tail wheel wire using
a rubber band and an antenna mount made from an extra servo horn.
To Tail Wheel Wire

C/g AND BALANCINg

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